EP3116648A1 - Catalyst precursor material on a tio2 basis, and production and use thereof - Google Patents

Abstract

The invention relates to a catalyst precursor material, more specifically to a powdered catalyst precursor material on a TiO₂ basis, which contains at least one shaping auxiliary; to methods for producing said material; to the use for the production of moulded parts; and to the use of said moulded parts as catalyst or catalyst carrier.

Description

 TiOg-based catalyst precursor material, its preparation and its use

The invention relates to a catalyst precursor material, and more particularly to a powdered Ti0 ₂ -based catalyst precursor material containing at least one molding assistant, to a process for its preparation, to use for the production of moldings and to the use of the moldings as catalyst or catalyst support. The use of powdered titanium dioxide to produce shaped catalysts or catalyst supports has long been known. For certain applications, eg for "Claus catalysis", the titanium dioxide moldings can be used directly as a catalyst without the addition of other materials.For other applications, titanium dioxide-containing moldings with active metals such as Cr, Mo, W, Fe, Ru, Os , Co, Ni, Pd, Pt, Cu, Ag, V or Zn or their metal oxides In these cases, the titania-containing moldings serve as so-called catalyst carriers, as well as the co-processing of titanium dioxide with active materials for the production of titania-containing catalysts For example, catalysts consisting of titanium dioxide, WO3 and V2O5 are used for the selective catalytic reduction of nitrogen oxides in exhaust gases of combustion plants, waste incineration plants, gas turbines, industrial plants and engines Such titanium dioxide shaped bodies serving as catalyst or catalyst support for fixed bed or fluidized bed Systems used must have sufficiently high strengths Otherwise, since the catalyst can break apart when filling the reactor and / or can be crushed by the gas pressure, the heat load and dynamic loads during the reaction or can be subject to severe abrasion.

US 41 13660 describes a process for the preparation of catalysts and catalyst supports (moldings) with improved mechanical strengths, the consist predominantly of titanium dioxide. The production of these moldings takes place in such a way that titanium dioxide or a precursor thereof in the presence of metatitanic acid sol or gel is subjected to a calcining treatment at temperatures of 200 to 800 ° C.

US Pat. No. 4,388,288 describes a process for producing porous titanium dioxide catalysts / catalyst supports in the form of shaped bodies, in which pulverulent, low-crystalline or amorphous titanium dioxides are mixed with water and a shaping assistant. This paste is then molded and annealed at temperatures of typically 200-900 ° C.

No. 3,919,119 describes the preparation of abrasion-enhanced catalyst supports which comprise a mixture of a titanium chelate with titanium dioxide and a gelling agent. After gelation of the mixture, it is dried and calcined. The titanium chelate complex used is preferably diethanolamine titanate.

EP 0389041 A1 describes a process for the preparation of titania extrudates from a moldable dough, which process comprises mixing and kneading a particulate titanium dioxide with water and an alkanolamine or ammonia or an ammonia releasing compound. Further, the extrusion and calcination of the extruded dough strands is typically described at 450-750 ° C. EP 0389041 describes titanium dioxide moldings having specific surfaces of less than 100 m ² / g and prepared only with the addition of inorganic additives, such as silica or zeolites.

Powdered catalyst materials based on titanium dioxide, which have high specific surface areas and are particularly suitable for producing titanium dioxide moldings with high specific surface areas and with good mechanical strengths, are not known in the prior art.

The object of the invention is to overcome the disadvantages of the prior art and a catalyst precursor material based on titanium dioxide with high specific surface area, which is particularly suitable for the production of titanium dioxide moldings with high mechanical strength and high specific surface areas. By the inventors has now been found that a powdered Katalysatorprecursormaterial on TiO2-based comprising one or more shaping auxiliary and having specific surface areas of at least 150 m ² / g, suitable for the production of titanium dioxide molded bodies, which, surprisingly, by high mechanical strengths and high specific surface areas.

Accordingly, the invention relates to a TiO ₂ based powdered catalyst precursor material containing TiO ₂ particles of the formula TiO (2 _-X ) (OH) 2 × (x = 0-1), wherein the particles are coated with one or more shaping aids and have a specific surface of at least 150 m ² / g after occupancy and drying. Thus, the TiO 2 -based catalyst precursor material of the present invention may contain such particles of titanium dioxide and hydrated forms thereof as described above.

Further, the powdery catalyst precursor material based on TiO 2, which can be described as the TiO 2 particles represented by the formula TiO (2-x) (OH) ₂ x (x = 0-1) and those having the above-mentioned coating aids, can be used. in addition to one or more shaping aids additionally also S1O2, Al2O3 and / or their hydrated forms such as AIO (OH) or mixtures thereof, for example with a content of 50-99.5 wt.%, preferably 70-99.5 wt. % TiO ₂ , 0.5-30% by weight, especially 4-15% by weight of forming assistant and 0.1-50% by weight, especially 0.1-1 15% by weight of S1O2, Al2O3 and / or their hydrated forms such as AIO (OH) include. In this case, these optional components are preferably added to the TiO 2 component before the addition of the shaping aid (s). The pulverulent catalyst precursor material can also, for example, depending on the neutralizing agent used to neutralize sulfuric acid adhering to the TiO 2 particles, additionally contain 0.5 to 30% by weight, especially 5 to 25% by weight, of CaSO ₄ , BaSO ₄ or mixtures included.

The wt .-% in this specification according to the invention relate to the total weight of the catalyst precursor material after drying at 105 ° C for at least 120 minutes and add up to 100 wt .-% of the total weight of the material, wherein the optional components are included.

The powdered catalyst precursor material particularly has a specific surface area of at least 150 m ² / g, especially at least 200 m ² / g, especially at least 300 m ² / g. The total pore volume (N ₂ -porosimetry) is at least 0.25 cm ³ / g, especially at least 0.3 cm ³ / g, especially at least 0.4 cm ³ / g and very particularly 0.6 cm ³ / g , The crystalline parts of the titanium dioxide are preferably present in the anatase modification. "Powdered" means according to the invention that the particles generally have a size of <1 mm (sieving). The TiO 2 particles of the catalyst precursor material according to the invention in the preferred embodiment have an irregular shape which can be described approximately as spherical. These are not tube, stick or platelet materials. The surface of the powdered catalyst precursor material is coated with the forming aid. This surface coverage of the catalyst percursor material with one or more shaping auxiliaries can be achieved particularly well by the process according to the invention, whereas a pure physical mixture of pulverulent catalyst precursor materials with shaping aids generally does not lead to a comparable surface coverage and formability. According to the invention, the pulverulent catalyst precursor material is obtained by mixing a suspension of TiO 2 particles of the formula TiO (2-x) (OH) ₂ x (0 <x <1) with the shaping assistant or mixtures of several shaping aids as such, in solution or suspension is treated and thereby the surface of said TiO2 particles with the (n) forming aid (s) is occupied.

The suspension of TiO 2 particles having the formula TiO (2 _-X ) (OH) 2 _X (0 <x <1) may in one embodiment be metatitanic acid of the formula TiO (OH) ₂ , which is used to prepare TiO ₂ applied sulfate process is obtained as an intermediate. In other production processes, the suspension of TiO ₂ particles with the formula TiO (2 _-X ) (OH) 2 _X (0 <x <1) can also be prepared by precipitation, hydrolysis or sol-gel processes from Ti-containing solutions, in particular from hydrolysable compounds such as TiOSO ₄ or T1OCl 2 -containing solutions.

By occupying the surface of the particles is also an occupancy within the pores to understand, if possible. For the occupation, it is important according to the invention that sufficient OH groups are available which can interact with the shaping assistant or agents, for example by protonation, hydrogen bonds or possibly covalent bonds. This is generally not possible if the hydroxyl groups present on the surface of the particles have formed a Ti-O-Ti unit with elimination of water, for example when drying at elevated temperature. A TiO 2 -containing material in which a shaping aid without interaction, in particular with hydroxyl group (s) on the surface and thus usually after the drying of the metatitanic acid deposited, usually shows no comparable stability of the extrudates and is not covered by the invention , The inventors have found that one or more compounds for covering the surface of the TiO _(2-X) (OH) _2x (0 <x <1) / TiO 2 particles can be used as shaping aids, which are at temperatures below the transition temperature of Anatase in rutile (915 ° C), preferably to below 600 ° C, more preferably below 400 ° C, preferably as far as possible residue-free, evaporate, sublime or decompose. The forming aid aids shaping and may be left between and / or on the particles of the powdered catalyst precursor material and assist in kneading, as well as helping to singulate the particles of the powdered catalyst precursor material. Thus, as shaping aids, it is possible to add substances which primarily promote the formation of a plastic mass during kneading and, moreover, the mechanical stability of the shaped body during shaping. These shaping aids are removed on calcination of the molding, with complete removal preferred.

The shaping assistant may preferably be an organic hydrocarbon compound which may contain at least one functional group selected from hydroxy, carboxy, amino, imino, amido, ester, sulfonyl, keto, and their thio analogues, or several different thereof; at temperatures below the transition temperature of anatase in rutile (915 ° C), preferably below 600 ° C, more preferably below 400 ° C, for example in the preparation of the titanium dioxide molded body according to the invention, evaporated, decomposed or sublimed. Preferred is a low molecular weight organic hydrocarbon compound having at least one functional group containing one or more oxygen atoms, such as hydroxy, carboxy. According to the invention, a low molecular weight organic hydrocarbon compound is understood to mean a hydrocarbon compound having one to twelve carbon atoms which is at least one of the substituent groups selected from hydroxy, carboxy, amino, imino, amido, imido, ester, sulfonyl, keto, and their thio analogues, especially hydroxy, carboxy , having. Thus, the shaping aid may be an acid, a base, an alkanolamine or another substance which, when calcined, the titanium dioxide molded body according to the invention at temperatures below the transition temperature of anatase in rutile (915 ° C), preferably below 600 ° C, more preferably vaporizes below 400 ° C, decomposes or sublimates.

The shaping assistant is preferably an organic acid, particularly preferably a carboxylic acid, in particular having one to six carbon atoms, including a di- and tricarboxylic acid, particularly preferably acetic acid, oxalic acid, tartaric acid, maleic acid, or citric acid, in particular oxalic acid. Nitrogenic acid, ammonia, alkanolamine or an ammonia-releasing compound may also preferably be used as the shaping assistant. Carbohydrates such as cellulose, cellulose ethers, tyloses, glucose, polyacrylamines, polyvinyl alcohol, stearic acid, polyethylene glycol or mixtures thereof can likewise be used as shaping aids. After evaporation, sublimation or decomposition of the shaping aid, the molding according to the invention has a residual carbon content of less than 2% by weight, preferably less than 1% by weight, based on the weight of the molding after calcining.

More specifically, the invention thus relates to - wherein the wt .-% in each case based on the total weight of the dried catalyst precursor material:

a förm2 based powdered catalyst precursor material containing ΤΊΟ2 particles of the formula TiO (2- _X ) (OH) 2 _X (x = 0-1), the particles being coated with one or more forming aids and after coating and Drying have a specific surface area of at least 150 m ² / g, containing:

50-99.5% by weight of the titanium-oxygen compound having the general formula TiO (2 _-X ) (OH) 2 ×, where x = 0 to 1, or mixtures thereof,

0.5 to 50 wt .-% of a shaping aid, at temperatures below the transition temperature of anatase in rutile (915 ° C), preferably below 600 ° C, more preferably below 400 ° C, for example in the preparation of the inventive Titanium dioxide shaped body, evaporated, decomposed or sublimed, or mixtures thereof; a powdered Ti0 ₂ -based catalyst precursor material as defined above containing:

70-99.5 wt .-% of the titanium-oxygen compound having the general formula TiO ₍₂ -x ₎ OH ₂ x, where x = 0 to 1, or mixtures thereof,

0.5-30% by weight of the forming aid;

a powdered Ti0 ₂ -based catalyst precursor material as defined above with an additional content of:

0, 1 -. 15 wt.% S1O2 and / or Al2O3 or hydrated forms thereof a powdered Ti0 ₂ -based catalyst precursor material with a

Salary at:

40-60 wt .-% of the titanium-oxygen compound having the general formula TiO ( _2-X ) (OH) 2x, where x = 0 to 1, or mixtures thereof,

40-60% by weight of Si0 ₂ and / or Al ₂ O ₃ ,

0.5-20% by weight of the forming aid;

a powdered Ti0 ₂ -based catalyst precursor material as defined above with an additional content of:

0.1 to 30% by weight of CaSO ₄ , BaSO ₄ or mixtures thereof

a powdery Ti0 ₂ -based catalyst precursor material as defined above with a shaping assistant selected from

 an organic hydrocarbon compound which may contain at least one functional group selected from hydroxy, carboxy, amino, imino, amido, esters, sulphonyl, keto and their thio analogues, or several of which are different, at temperatures below the transformation temperature of anatase in Rutile (915 ° C), preferably below 600 ° C, especially below 400 ° C, for example in the preparation of the titanium dioxide molded body according to the invention, evaporated, decomposed or sublim tion, for example, an organic acid, preferably a carboxylic acid, particularly preferably acetic acid , Oxalic, tartaric, maleic or citric acid, most preferably oxalic acid,

 Ammonia, alkanolamine or an ammonia-releasing compound,

- Carbohydrates such as cellulose, cellulose ethers, glucose, polyacrylamines, polyvinyl alcohol, stearic acid, polyethylene glycol or mixtures thereof. a powdery catalyst precursor material based on TiO 2 as defined above with a spec. Surface of at least 150 m ² / g, preferably at least 200 m ² / g, and particularly preferably at least 300 m ² / g.

a powdered catalyst precursor material based on TiO ₂ as defined above with a pore volume (N ₂ desorption, total) of at least 0.25 cm ³ / g, preferably at least 0.30 cm ³ / g, particularly preferably at least 0.4 cm3 / g most preferably 0.6 cm ³ / g.

In accordance with the invention, hydrated preforms of TiO ₂ , SiO ₂ and / or Al ₂ O _{3 are} included. The preparation of pulverulent catalyst precursor materials according to the invention can be effected by adding one or more shaping auxiliaries, preferably in an aqueous solution, to a generally aqueous dispersion of titanium dioxide or a titanium dioxide precursor (generally TiO _(2-X) (OH) _2x ( x = 0-1)) and subsequent drying. This dispersion of titanium dioxide may also contain further constituents such as SiO ₂ and / or Al ₂ O ₃ and / or CaSO ₄ and their hydrated forms thereof such as AIO (OH), sulfate ions, phosphate ions and, depending on the preparation of the titanium dioxide dispersion, further typical accompanying substances such as Na , K, etc. included. In one embodiment, the sulphate content of the powdered catalyst precursor material according to the invention is less than 2.0% by weight, especially less than 1.5% by weight, based on the total weight of the dried catalyst precursor material.

Thus, the invention also relates to a process for the preparation of the powdery catalyst precursor material based on TiO ₂ , in which:

- A suspension of titanium oxide hydrate and / or hydrated titanium dioxide of the general formula TiO _(2-X) (OH) _2x (0 <x <1) or mixtures thereof (referred to herein as "titanium dioxide suspension") with the shaping aid or mixtures thereof is mixed and

- The resulting suspension is dried at a temperature of below 150 ° C and, if necessary, subjected to a grinding step. The forming aid or mixture thereof may be added in dry form, in suspension or in solution.

In one embodiment, it is preferred to use "titanium dioxide suspensions" which

 have a Ti content calculated as titanium dioxide of 100-400 g T1O2 / I,

have an average particle size of 5 nm-5 pm, preferably 10 nm-2000 nm, especially 10 nm-1000 nm, preferably 50 nm-1000 nm, particularly preferably 20 nm-800 nm, very particularly preferably 30-200 nm, and

- After drying at 105 ° C for at least 120 min, a specific surface area (5-point BET, N ₂ ) of 50 - 500 m ² / g, preferably 100 - 400 m ² / g, more preferably 250 - 400 m ² / g have.

 - Preferably, after drying at 105 ° C for at least 120 min in the X-ray diffraction analysis, the anatase phase, preferably the crystalline phases of the particles consist of anatase.

Another embodiment relates to the process for the preparation of the powdery catalyst precursor material based on TiO 2, in which:

a suspension of metatitanic acid is neutralized with a caustic solution,

the neutralized metatitanic acid is washed with water,

the washed metatitanic acid, preferably as a filter cake, is taken up again in an aqueous phase,

a preferably aqueous solution of the shaping assistant is added to the resulting suspension,

the suspension obtained is dried at a temperature below 150 ° C and, if necessary, subjected to a grinding step.

The metatitanic acid used contains titanium-oxygen compounds and may contain free and bound sulfuric acid, wherein the crystalline components of the titanium-oxygen compounds contained present in anatase modification and have a typical crystallite size of about 5-10 nm. The titanium-oxygen compounds can be defined by the general formula TiO (2 _-X ) (OH) 2 ×, where (0 <x <1). The metatitanic acid is produced in the production of Ti0 ₂ by the sulfate process as an intermediate. In the sulphate process llmenit and / or slag is digested with 90% H ₂ S0 ₄ , the resulting digestion cake dissolved in water and the solution clarified. By adding scrap iron, dissolved trivalent iron is converted to the divalent form because Fe ^{3+ would} disadvantageously precipitate and be adsorbed to Fe (OH) ₃ together with the metatitanic acid. Depending on the Fe content of the solution precipitates after cooling the solution FeS0 ₄ x 7H ₂ 0, which is removed from the system. In the subsequent hydrolysis, the TiOS0 _{4 is converted} into metatitanic acid. Other forms of hydrate, such as orthotitanic acid, are converted into metatitanic acid with elimination of H ₂ O.

The neutralization of the (sulfuric) metatitanic according to the invention, especially with an alkali, preferably selected from NaOH, ammonia, calcium carbonate, calcium hydroxide or Ba (OH) ₂ , particularly preferably with NaOH, take place.

Preferably, the resulting neutralized metatitanic acid is washed with water to a conductivity of at most 500 pS / cm, followed by slurry or dispersion of the washed filter cake, preferably with a stirrer, more preferably a dissolver.

After addition of the preferably aqueous solution of the shaping assistant, the suspension obtained is optionally subjected to a ripening step, preferably for 10 minutes to 24 hours, more preferably for 15 minutes to 3 hours, preferably at temperatures of T = 20-80 ° C.

The suspension obtained after the ripening step is dried according to the invention at a temperature of below 150 ° C, in order to prevent evaporation or decomposition of the forming aid, preferably in a temperature range of 90-140 ° C, in particular by means of spray-drying or mill-drying, and, if required to undergo a milling step to comminute any agglomerates formed. Because the Hot gas temperatures in the mill drying usually at 250 ° to 300 ° C, in the spray drying at 250 ° to 500 °, sometimes even up to 600 ° C, product flow and product temperature must be carefully monitored to prevent evaporation or decomposition of the forming aid to Accordingly, during spray-drying, the product outlet temperatures are in the range of 90-140.degree. C., in the case of mill-drying, the product outlet temperatures are approximately 120.degree. to 130.degree. C., in particular 125.degree.

The auf2-based powdered catalyst precursor materials according to the invention thus obtained can be used according to the invention for the production of moldings according to the invention using the following method:

1 . Preparation of an aqueous titanium dioxide paste from:

 - Inventive powdered catalyst precursor material on ΤΊΟ2

Base with shaping aids

 Peptizing agent, preferably hydrochloric acid, sulfuric acid, nitric acid,

Acetic acid, oxalic acid.

 - Water, preferably desalted water, and as optional ingredients

 i. Plasticizer such. Cellulose, clay, polyvinyl alcohols,

Polyethylene glycol, preferably cellulose, particularly preferably Tylose ii. Binders such as TiO ₂ sols, TiOSO ₄ solution, alumina, SiO ₂ sols or clays, preferably TiO ₂ sol, TiOSO ₄ solution or AIO (OH) (boehmite or pseudoboehmite)

 iii. Bases preferably ammonia or amine-containing compounds iv. Lubricants such. B. glycerin

 v. Pore images such. B. starch or carbon black

 The water content of the paste is preferably chosen so that the paste by means of an extruder (twin screw) with pressures of 1 to 100 bar, or, if necessary, up to 200 bar by a 1-5 mm diameter

Nozzle can be pressed;

2. kneading of the resulting paste, for example in a double-Z kneader, for typically 30-60 minutes; 3. shaping, eg extrusion, the paste for the production of moldings such as strands z. B. with 1 -5 mm diameter and a length of typically 10 - 25 mm;

 4. Drying of the moldings such as extrudates first at 20 to 30 ° C, especially at 25 ° C, for a period of more than 1, especially more than 6, especially more than 12 hours, then at 80 - 120 ° C, preferably at 90 ° C, for 60 to 120 min and then calcining at 300 ° to 600 °, especially at 350 to 600 ° C, more preferably at 350 ° to 450 °, especially at 400 ° C for 1 -4 hours.

The molded articles produced from the catalyst precursor materials according to the invention usually have the following properties:

 Crushing Strength of> 5, especially> 8 N / mm, preferably> 10 N / mm, more preferably> 15, most preferably 25 N / mm;

- Spec. Surfaces of> 80, especially> 100 m ² / g, preferably> 120 m ² / g, particularly preferably> 150 m ² / g, very particularly preferably> 200 m ² / g;

- N ₂ -Porenvolumina of> 0.2 cm ³ / g, preferably> 0.3 cm ³ / g, particularly preferably> 0.6 cm ³ / g.

According to the invention, the moldings produced from the catalyst precursor materials according to the invention can be used as catalyst or catalyst support for catalytically active metals such as V, W, Co, Mo, Ni, Fe, Cu, Cr, Ru, Pd, Pt, Ag, Zn for applications in the field of

- Photocatalysis

 - Claus catalysis

 - Claus tail gas treatment

 - SCR, hydrotreating, gas-to-liquid, Fischer-Tropsch, etc.

be used.

The present invention will be further illustrated by the following experimental part including the production examples and the comparative examples of the present invention. Description of the measuring methods used

Determination of carbon

The sample is burned at 1300 ° C in an oxygen stream. The resulting carbon dioxide is detected by infrared analysis.

Determination of sulfur

The sample is burned at 1400 ° C in an oxygen stream. The resulting sulfur dioxide is detected by infrared analysis. Thereafter, the determined S content is converted to S0 ₄ .

Determination of titanium calculated as TiQ ₂

Digestion of the material with sulfuric acid / ammonium sulfate or potassium disulfate. Reduction with Al to Ti ³⁺ . Titration with ammonium ferric sulfate (indicator: NH ₄ SCN).

Determination of the specific surface area (multipoint method) and analysis of the pore structure after the nitrogen gas absorption process

(Ng Porosimetry)

The specific surface and the pore structure (pore volume and pore diameter) are carried out by means of N ₂ -orosimetry with the device Autosorb 6 or 6B from Quantachrome GmbH. The BET surface area (Brunnauer, Emmet and Teller) is determined according to DIN ISO 9277, the pore distribution according to DIN 66134.

Sample preparation (N ₂ porosimetry)

The sample weighed into the measuring cell is pre-dried at the baking station for 16 h under vacuum. Subsequently, the heating is carried out under vacuum to 180 ° C in about 30 min. The temperature is then maintained for one hour while maintaining the vacuum. The sample is considered sufficiently degassed if a pressure of 20-30 millitorr is set on the degasser and after disconnecting the vacuum pump the needle of the vacuum gauge remains stable for approx. 2 minutes. Measurement / Evaluation (Ng porosimetry)

The entire N ₂ isotherm is measured with 20 adsorption points and 25 desorption points. The evaluation of the measurements was carried out as follows:

Specific surface area (multipoint BET)

 5 measuring points in the evaluation range from 0, 1 to 0.3 p / pO Evaluation of total pore volume

 Determination of the pore volume according to the Gurvich rule

(Determination of the last adsorption point)

The determination of the total pore volume is carried out according to DIN 66134 according to the Gurvich rule. After the s.g. Gurvich's rule determines the total pore volume of a sample from the last pressure point in the adsorption measurement: p. Pressure of the sorptive

pO. Saturation vapor pressure of the sorptive

 Vp. Specific pore volume according to the Gurvich rule (the total pore volume at p / Po 0.99) quasi last adsorption pressure point which is reached in the measurement.

Evaluation of pore diameter (hydraulic pore diameter)

The calculation uses the relationship 4Vp / A _B ET, which corresponds to the "average pore diameter" A _B ET specific surface according to ISO 9277.

Determination of the strength of extrudates

The measurement of the strength of the extrudates is carried out by applying a pneumatic pressure on an extrudate specimen between two horizontally mounted flat metal plates. In this case, a 4-5 mm long extrudate specimen is placed centrally on a lower, stationary plate. The upper, pneumatically controlled counterplate is slowly driven down to the slight touch of the extrudate specimen. The pressure is now up for destruction (cracking, breaking or splitting) of the extrudate sample body continuously increased. The pressure necessary to destroy the extrudate sample is read on a digital display in kg. To indicate the strength in N / mm, multiply the value read in kg by 9.81 and divide by the length of the extruded specimen. The strength of the extrudates is calculated from the average of 30 measurements.

Determination of the phase and crystallite size according to Scherrer

 To determine the crystal modification (phase identification), an X-ray diffractogram is taken. For this purpose, the intensities of the x-rays diffracted by the Bragg condition at the lattice planes of a crystal are measured against the diffraction angle 2 theta. The X-ray diffraction pattern is typical for one phase. Execution and evaluation:

 The material to be examined is brushed onto the preparation carrier with the aid of a slide. The evaluation of the powder diffractometry data is carried out using the JCPDS powder diffractometry database. The phase is identified when the measured diffraction pattern corresponds to the stored bar pattern.

The measurement conditions are typically: 2 theta = 10 ° -70 °, measured in steps of 2 theta = 0.02 °, measuring time per step: 1.2 s. The crystallite size is determined by the Scherrer method from the half-width of the anatase reflex at 2 theta of 25.3 ° according to the following formula:

D crystallite = K ^* I / (S ^* cos (theta)

where: D crystallite: crystallite size [nm]

 K: Shape constant = 0.9

 Theta: angular position of the measurement reflex 2 theta / 2

 S: half width of the measurement reflex

I: wavelength of the used X-ray Determination of mean particle size

 To determine the mean particle size of titanium oxide hydrate and / or hydrated titanium dioxide, the aqueous "titanium dioxide suspension" is first diluted in a solution of 1 g Calgon / I deionized water, so that a concentration of about 0.4 g T1O2 to 60 ml The thus diluted "titanium dioxide" solution is then first for 5 min in an ultrasonic bath (eg Sonorex Super RK106, Bandelin) and stirring and then for 5 min with an ultrasonic finger (Branson Sonifier W-450 with gold booster for amplification and 3/4 inch high-power resonator) dispersed. The particle size distribution is determined by means of a photon correlation spectrometer with Zetasizer Advanced software, eg. Zetasizer 1000HSa, Malvern. A measurement with multimodal calculation is carried out at a measuring temperature of 25 ° C. The mean particle size d50 is the d50 value of the volume distribution, which corresponds to the density of the mass distribution.

Examples Example 1

Hombikat MTSA (metatitanic acid, commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water until the conductivity in the filtrate is less than 200 pS / cm. The filter cake is redisperigert and treated with an aqueous oxalic acid solution (corresponding to 6 g of oxalic acid on 94 g of T1O2). This suspension is ripened for 1 h at T = 25 ° C and then spray-dried, while the Produktaustragstemperatur was T = 1 10 +/- 5 ° C. The properties of this powder are listed in Tab. 1. 400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then 34.4 g of a 10 wt .-% hydrochloric acid and so much desalinated water are added until the plasticine has plastic behavior (about 70 g). These Mixture is then kneaded for 30 minutes. Subsequently, 24 g of ammonia water (25%) are added and kneaded for a further 30 min. The putty is then discharged by extrusion at a pressure of 40-70 bar, over a 4 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus prepared are first dried in air and then heated for 60 min at 90 ° C, then for several hours to the Caicinierungstemperatur of 400 ° C and held for 120 min at this temperature, and then cooled to room temperature. Example 2

Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water until the conductivity in the filtrate is less than 200 pS / cm. The filter cake is redisperigert and treated with an aqueous oxalic acid solution (corresponding to 8 g of oxalic acid dihydrate to 92g ΤΊΟ2). This suspension is ripened for 2 h at T = 50 ° C and then spray-dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried TiO ₂ or titanium oxide hydrate powder are listed in Tab.

400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then 16.4 g of a 10 wt .-% hydrochloric acid and so much desalted water is added until the plasticine has plastic behavior (about 94 g). This mixture is then kneaded for 30 minutes. Then 1 1 g of ammonia water (25%) and 44 ml of deionized water is added and kneaded for 30 min. The kneading material is then discharged by means of extrusion, at a pressure of 40-70 bar, over a 3 mm die and cut to the desired length (about 15-20 mm). The extrudates thus obtained are first dried in air and then tempered as in Example 1.

Example 3 Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water. The filter cake is redisperigert and mixed with maleic acid with stirring (corresponding to 6 g of maleic acid to 94 g Ti0 ₂ ). This suspension is ripened for 2 h at T = 50 ° C and then spray-dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried ΤΊΟ2 or titanium oxide hydrate powder are listed in Tab. 1. Example 4

 Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water. The filter cake is redisperigert and added with stirring with citric acid monohydrate (corresponding to 6 g of citric acid monohydrate on 94 g of T1O2). This suspension is ripened for 2 h at T = 50 ° C and then spray-dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried T1O2 or titanium oxide hydrate powder are listed in Tab. 400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then 32.8 ml of a 10 wt .-% hydrochloric acid and deionized water are added until the plasticine has plastic behavior (about 75 ml). This mixture is then kneaded for 30 minutes. Subsequently, 17.2 ml of ammonia water (25%) are added and kneaded for a further 30 minutes. The kneading material is then discharged by means of extrusion, at a pressure of 40-70 bar, over a 3 mm die and cut to the desired length (about 15-20 mm). The extrudates thus produced are first dried in air and then tempered as in Example 1.

Example 5

Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and with water washed. The filter cake is redisperigert and with stirring with tartaric acid added (corresponding to 6 g of tartaric acid to 94 g ΤΊΟ2). This suspension is ripened for 2 h at T = 50 ° C and then spray-dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried ΤΊΟ2 or titanium oxide hydrate powder are listed in Tab. 1.

Example 6

 Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water. The filter cake is redisperigert and treated with stirring with triethanolamine (corresponding to 1 g of triethanolamine to 99 g of T1O2). This suspension is ripened for 2 h at T = 50 ° C and then spray-dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried T1O2 or titanium oxide hydrate powder are listed in Tab.

Example 7

The starting material used is a commercially available titanium oxide hydrate suspension (TiO.sub.x ₎ (OH) ₂ × (0 <x <1)), with a Ti content calculated as titanium dioxide of about 200 g of T1O.sub.2 / I, an average particle size of 48 nm (measured by PCS measurement after ultrasonic finger dispersion and with a specific surface area of 350 m ² / g (N ₂ -5-Pt-BET, measured after drying at 105 ° C.). (Eg Hombikat M310 suspension, commercial product from Sachtleben Chemie GmbH.) This suspension is combined with oxalic acid dihydrate with stirring (corresponding to 6 g of oxalic acid dihydrate on 94 g of T1O2) .This suspension is stirred for 24 h and then spray-dried, the product discharge temperature being T = 110 ± 5 ° C. The properties of this spray-dried T1O2 or titanium oxide hydrate powder are listed in Tab.

400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then the pH of the kneading composition is adjusted to pH = 1 by addition of hydrochloric acid and as long as desalted water is added until the plasticine has plastic behavior. This mixture is then kneaded for 30 minutes. The pH of the kneading composition is then adjusted to pH = 6 by addition of ammonia water (25% strength) and kneaded for a further 30 minutes. The putty is then discharged by extrusion, at a pressure of 140-180 bar, over a 3 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus produced are first dried in air and then tempered as in Example 1.

Example 8

Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water. The filter cake is redisperigert and with stirring with Tyloselösung (Tylose 4000 P2) added (corresponding to 0.5 g Tylose on 99.5 g of T1O2). This suspension is ripened for 2 h at T = 50 ° C and then spray-dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried Ti0 ₂ or titanium oxide hydrate powder are listed in Tab. 1.

400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then, the pH of the kneading composition is adjusted by adding hydrochloric acid to pH = 1, 5 and as long as desalted water is added until the plasticine has plastic behavior. This mixture is then kneaded for 30 minutes. The pH of the kneading composition is then adjusted to pH = 5 by addition of ammonia water (25% strength) and kneaded for a further 30 minutes. The putty is then discharged by extrusion over a 3 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus prepared are first dried in air and then heated for 60 min at 90 ° C, then for several hours to the calcination temperature of 450 ° C and held for 120 min at this temperature, and then cooled to room temperature. Example 9

As starting material, a commercially available titanium oxide hydrate suspension (TiO _(2x) (OH) _2x (0 <x <1)) is calculated with a Ti content as titanium dioxide of approximately 300 g of T1O2 / l, a mean particle size of 950 nm (measured by PCS measurement after ultrasonic finger dispersion and with a specific surface area of 350 m ² / g (N ₂ -5-Pt-BET, measured after drying at 105 ° C.). (Eg Hombikat M210 suspension, commercial product of Sachtleben Chemie GmbH) This suspension is adjusted to pH = 3.8 while stirring with acetic acid and this suspension is then spray-dried, the product discharge temperature being T = 10 ± 5 ° C. The properties of this spray-dried T1O2 or Titanium oxide hydrate powders are listed in Table 1. 400 g of this powder and 64 g of an aqueous 2.5% tylose solution are introduced into the mixing trough of the double Z kneader and mixed for about 1 minute, and the pH then becomes the dough by means of adding vo Hydrochloric acid adjusted to pH = 1 and as long as deionized water is added until the plasticine has plastic behavior. This mixture is then kneaded for 30 minutes. The pH of the kneading composition is then adjusted to pH = 6 by addition of ammonia water (25% strength) and kneaded for a further 30 minutes. The putty is then discharged by extrusion over a 3 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus prepared are first dried in air and then heated for 60 min at 90 ° C, then for several hours to the calcination temperature of 350 ° C and held for 120 min at this temperature, and then cooled to room temperature.

Example 10

Hombikat MTSA (commercial product of Sachtleben Chemie GmbH.) Is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water. The filter cake is redisperigert. Subsequently, the pH of the suspension is adjusted to pH = 6.9 while stirring with ammonia. These Suspension is then spray dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried ΤΊΟ2 or titanium oxide hydrate powder are listed in Tab. 1.

400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then the pH of the kneading compound is adjusted to pH = 1 by addition of hydrochloric acid and as long as desalted water is added until the plasticine has plastic behavior. This mixture is then kneaded for 30 minutes. The pH of the kneading composition is then adjusted to pH = 6 by addition of ammonia water (25% strength) and kneaded for a further 30 minutes. The putty is then discharged by extrusion over a 3 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus prepared are first dried in air and then heated for 60 min at 90 ° C, then for several hours to the calcination temperature of 350 ° C and held for 120 min at this temperature, and then cooled to room temperature. Example 11

Hombikat MTSA (commercial product from Sachtleben Chemie GmbH) is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water. The filter cake is redisperigert. Subsequently, the pH of the suspension is adjusted to pH = 3.2 with stirring with nitric acid. This suspension is then spray dried, while the product discharge temperature was T = 1 10 +/- 5 ° C. The properties of this spray-dried Ti0 ₂ or titanium oxide hydrate powder are listed in Tab. 1. 400 g of this powder and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then the pH of the kneading composition is adjusted by adding hydrochloric acid to pH = 1 and as long as desalted water is added to the plasticine having plastic behavior. This mixture is then kneaded for 30 minutes. The pH of the kneading composition is then adjusted to pH = 6 by addition of ammonia water (25% strength) and kneaded for a further 30 minutes. The putty is then discharged by extrusion over a 3 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus prepared are first dried in air and then heated for 60 min at 90 ° C, then for several hours to the Caicinierungstemperatur of 350 ° C and held for 120 min at this temperature, and then cooled to room temperature.

Example 12

 400 g of the powder from Example 1 and 64 g of an aqueous 2.5% Tyloselösung be introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then 34 g of a 10 wt .-% hydrochloric acid and 20 g of an acidic titania sol ("HOMBIKAT XXS 100", commercial product of Sachtleben Chemie GmbH) and as much desalted water is added until the plasticine has plastic behavior (approx. This mixture is then kneaded for 30 minutes, then 7.4 ml of ammonia water (25%) are added and the mixture is kneaded for a further 30 minutes, the mixture is then extruded, at a pressure of 120-150 bar The extrudates produced in this way are first dried in air and then for 60 min at 90 ° C, then for several hours to the Caicinierungstemperatur of 400 ° C. heated and held for 120 min at this temperature, and then cooled to room temperature.

Example 13

400 g of powder from Example 1 and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then 34 g of a 10 wt .-% hydrochloric acid and 30 g of an acidic titania sol ("HOMBIKAT XXS 100", commercial product of Sachtleben Chemie GmbH) and as much desalted water is added until the plasticine has plastic behavior will then be for 30 Kneaded for a few minutes. Then 7.4 ml of ammonia water (25%) are added and kneaded for a further 30 minutes. The putty is then discharged by extrusion, at a pressure of 120-150 bar, over a 3 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus prepared are first dried in air and then heated for 60 min at 90 ° C, then for several hours to the calcination temperature of 350 ° C and held for 120 min at this temperature, and then cooled to room temperature. Comparative Example 1

 400 g of Hombikat M21 1 (titanium dioxide, commercial product from Sachtleben) and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then 60 g of a 10 wt .-% hydrochloric acid and deionized water are added until the plasticine has plastic behavior (about 70 ml). This mixture is then kneaded for 30 minutes. Subsequently, 20 g of ammonia water (25%) and 20 ml of deionized water are added and kneaded for 30 minutes. The kneading material is then discharged by means of extrusion, at a pressure of 40-70 bar, over a 3 mm die and cut to the desired length (about 15-20 mm). The extrudates thus obtained are first dried in air and then tempered as in Example 1.

Comparative Example 2

Hombikat MTSA (commercial product from Sachtleben) is neutralized with sodium hydroxide solution to a pH of 6.5 and washed with water to a filtrate conductivity of <200 pS / cm. The filter cake is redisperigert and spray dried. The properties of this spray-dried TiO ₂ or titanium oxide hydrate powder are listed in Tab. 400 g of this powder are introduced with 100 g of oxalic acid (9, 1%) and 64 g of an aqueous 2.5% Tyloselösung in the mixing trough of the double Z-kneader and mixed for about 1 min. Then 27 g of a 10 wt .-% hydrochloric acid are added. This mixture is then kneaded for 30 minutes. Subsequently, 12 g of ammonia water (25%) and 35 ml of deionized water are added and kneaded for 30 minutes. The kneading material is then discharged by means of extrusion, at a pressure of 40-70 bar, over a 3 mm die and cut to the desired length (about 15-20 mm). The extrudates thus obtained are first dried in air and then tempered as in Example 1.

Comparative Example 3

 The typical properties of Hombikat M31 1 powder (titanium dioxide, commercial product from Sachtleben) are listed in Table 1.

400 g of Hombikat M31 1 (commercial product from Sachtleben) and 64 g of an aqueous 2.5% Tyloselösung are introduced into the mixing trough of the double Z-kneader and mixed for about 1 min. Then the pH of the kneading compound is adjusted to pH = 1 by addition of hydrochloric acid and as long as desalted water is added until the plasticine has plastic behavior. This mixture is then kneaded for 30 minutes. Subsequently, the pH of the kneading material for the addition of ammonia water (25%) is adjusted to pH = 6 and kneaded for a further 30 min. The putty is then discharged by extrusion over a 1, 8 mm die and cut to the desired length (about 15 - 20 mm). The extrudates thus produced are first dried in air and then tempered as in Example 1.

As shown in Tab. 2, the surface-modified powders according to the invention with high specific surface areas can be used to produce extrudates with high strength with simultaneously high specific surface areas and high pore volumes. Comparable TiO 2 -based powders with high specific surface areas are not known in the prior art.

The improvement in the strength of the extrudates by adding shaping aids before drying at the suspension stage is particularly surprising, since the addition of the same shaping aids during the kneading process does not substantially change the strength, as shown by Comparative Example 2. Table 1 - Powder properties

Poren¬

TiO _z - C- so ₄ - crystallite

Spec. Surface area volume

 Example salary salary salary size phase

(5 pt-BET) [m ² / g] (total)

 [Weight%] [weight%] [weight%] [nm]

[cm ³ / g]

 comparably

346 0.31 88.9 0.15 0.78 7 Anatase example 1

 comparably

312 0.30 86.7 0.12 1, 50 8 Anatase example 2

 comparably

354 0.81 84.8 n. D. 0,71 8 Anatas example 3

 Example 1 333 0.32 84.4 0.79 1, 3 8 anatase

Example 2 327 0.30 85.3 1, 40 0.78 8 Anatase

Example 3 320 0.30 85.2 2.3 n.d. n.d. anatase

Example 4 316 0.28 86.4 1, 8 n.d. n.d. anatase

Example 5 328 0.30 84.9 1, 8 n.d. n.d. anatase

Example 6 344 0.32 88.4 0.55 n.d. n.d. anatase

Example 7 351 0.78 77.1 0.85 0.39 8 Anatase

Example 8 349 0.31 87.7 n.d. 0.3 n.d. anatase

Example 9 352 0.33 85.1 n.d. 0.31 n.d. anatase

Example 10 347 0.31 86.3 n.d. n.d. n.d. anatase

Example 1 1 339 0.32 87.2 nd 0.29 nd anatase Tab. 2: Extrudate properties

Spec.

 middle

 surface

 Firmness Pore volume (total) pore

Example (5 point phase

[N / mm] [cm ³ / g] diameter

 BET)

 [Nm]

[m ² / g]

 comparably

5 106 0.29 1 1 Anatase example 1

 comparably

6 1 14 0.30 10 Anatase example 2

 comparably

4 126 0,50 16 Anatas example 3

 Example 1 28 107 0.27 10 anatase

Example 2 23 108 0.26 10 anatase

Example 4 10 103 0.26 10 anatase

Example 7 10 130 0.50 16 Anatase

Example 8 25 156 0.27 n.d. anatase

Example 9 20 232 0.25 n.d. anatase

Example 10 20 209 0.24 n.d. anatase

Example 1 1 1 1 126 0.24 n.d. anatase

Example 12 19 109 0.26 anatase

Example 13 37 260 0.27 anatase

Claims

 claims 1 . A T1O2 based powdered catalyst precursor material containing ΤΊΟ2 particles of the formula TiO (2 _-X) (OH) ₂ x (x = 0-1), wherein the particles are coated with one or more forming aids and after the Occupancy and drying have a specific surface area of at least 150 m ² / g, preferably> 200 m ² / g, particularly preferably> 300 m ² / g, with a content of: - 50 - 99.5 wt .-% of a titanium-oxygen compound having the general formula TiO (2 _-X ) (OH) 2x, where x = 0 to 1, or mixtures thereof, wherein the crystalline phases of the titanium Oxygen compound in the anatase modification,  From 0.5 to 50% by weight of a shaping assistant which evaporates on heating to a temperature below the transition temperature of anatase to rutile (915 ° C.), preferably to below 600 ° C., particularly preferably below 400 ° C., sublimates and / or decomposes, or mixtures thereof,  wherein the weight% refers to the total weight of the dried catalyst precursor material. A TiO 2 based powdered catalyst precursor material according to claim 1 containing:  - 70 - 99.5 wt .-% of the titanium-oxygen compound with the general Formula TiO (2 _-X ) (OH) 2x, where x = 0 to 1, or mixtures thereof, - 0.5 - 30 wt .-% of the forming aid,  wherein the weight% refers to the total weight of the dried catalyst precursor material. 3. A powdery catalyst precursor material based on TiO 2 according to claim 1 or 2 with a content of 0.1 to 20% by weight, especially 0.1 to 15% by weight. S1O2, and / or Al2O3, wherein the wt .-% based on the total weight of the dried catalyst precursor material relate. A powder-form catalyst precursor material based on TiO ₂ as claimed in claim 1, 2 or 3 having a content of 0.1 to 30% by weight, in particular 0.1 to 25% by weight, of CaSO ₄ , BaSO ₄ or mixtures thereof, where the wt % to the total weight of the dried catalyst precursor material. A powdery TiO 2-based catalyst precursor material according to any one of the preceding claims, wherein the molding aid is selected from:  an organic hydrocarbon compound which preferably contains at least one functional group selected from hydroxy, carboxy, amino, imino, amido, ester, sulfonyl, keto, and their thio analogues, or several different thereof, or mixtures thereof, in particular an organic acid, preferably a carboxylic acid, particularly preferably acetic acid, oxalic acid, tartaric acid, maleic acid or citric acid, very particularly preferably oxalic acid,  Carbohydrates, such as cellulose, cellulose ethers, tylose, glucose, polyacrylamines, polyvinyl alcohol, stearic acid, polyethylene glycol or mixtures thereof,  - Ammonia, alkanolamine or an ammonia-releasing compound or mixtures thereof, as well as  - nitric acid. Powder-form catalyst precursor material based on TiO 2 according to one of the preceding claims, having a pore volume (N ₂ desorption, total) of at least 0.25 cm ³ / g, preferably at least 0.30 cm ³ / g, particularly preferably at least 0.4 cm ³ / g, most preferably at least 0.6 cm ³ / g, more preferably at least 0.7 cm ³ / g A process for producing the powdery TiO 2 -based catalyst precursor material according to any one of claims 1 to 6, wherein: - An aqueous suspension of titanium oxide hydrate particles and / or hydrated titanium dioxide particles having the general formula TiO (2 _-X ) (OH) 2 _X. (0 <x <1) is mixed with the forming aid or a suspension or solution of the forming agent, and  - The resulting suspension is dried at a temperature of below 150 ° C and, if necessary, subjected to a grinding step. A process for producing the powdery Ti0 ₂ -based catalyst precursor material according to claim 7, wherein - An aqueous suspension of titanium oxide hydrate particles and / or hydrated titanium dioxide particles having the general formula TiO _(2-X) (OH) ₂ x (0 <x <1) is used, which is obtained by  a suspension of metatitanic acid is neutralized with a lye, optionally the neutralized metatitanic acid is washed with water, - Optionally, the washed metatitanic acid, preferably as a filter cake, is taken up again. 9. A process for producing the powdery Ti0 ₂ -based catalyst precursor material according to claim 8, wherein: - The suspension of metatitanic acid with an alkali selected from NaOH, ammonia, calcium carbonate, calcium hydroxide, Ba (OH) ₂ , particularly preferably with NaOH, is neutralized. A process for producing the powdery TiO ₂ -based catalyst precursor material according to claim 8 or 9, wherein:  - The neutralized metatitanic acid is washed with water to a conductivity in the filtrate of at most 500 pS / cm. 1 1. A process for producing the powdery TiO ₂ -based catalyst precursor material according to any one of claims 7 to 10, wherein - The titanium oxide hydrate particles and / or hydrated titanium dioxide particles having the general formula TiO ( _2-X ) (OH) _2X (0 <x <1) in the aqueous suspension has an average particle size of 5 nm - 5 pm, preferably 10 nm - 2000 nm, especially 10 nm - 1000 nm, more preferably 20 nm - 800 nm, most preferably 30 - have 200 nm. 12. A process for producing the Ti0 ₂ -based powdery catalyst precursor material according to any one of claims 7 to 11, wherein  - The suspension obtained after addition of the solution of the shaping aid is subjected to a ripening step, preferably for 10 min to 24 h, more preferably for 15 min to 3 h, preferably at temperatures of 20 - 80 ° C. 13. A process for producing Ti0 ₂ -containing shaped bodies using the powdered catalyst precursor material according to one of claims 1 to 6, in which:  powdered catalyst precursor material according to one of claims 1 to 6 with a peptizer and water and optionally a further additive selected from plasticizers, binders, bases, lubricants and pore-formers, or mixtures thereof, to a mixture such as a paste is mixed,  the resulting mixture is subjected to a further mixing operation, such as a kneading process,  the resulting mixture is shaped into a shaped body by means of a shaping device,  - The molding at a temperature of below 150 ° C, preferably in a temperature range of 80 to 120 ° C, dried and then at a temperature of below the transformation temperature of anatase in rutile (915 ° C), preferably below 600 ° C, particularly preferably below 400 ° C., preferably until calcined, until no shaping assistant or its decomposition product emerges from the shaped body. 14. A process for the production of Ti0 ₂ -containing moldings according to claim 1 1, wherein the resulting mixture is extruded by means of an extruder as a shaping device to a preferably strand-shaped extrudate. 15. A process for the production of Ti0 ₂ -containing moldings according to claim 13 or 14, wherein the amount of water is chosen so that the resulting mixture as kneaded paste by means of the extruder at a pressure of 1 to 100, especially up to 200 bar , in particular by an extrusion die with a diameter of 1 to 5 mm, can be extruded into an extrudate. 16. A process for producing Ti0 ₂ -containing moldings according to any one of claims 13 to 15, wherein the extrudate is dried in a temperature range of 80-120 ° C, preferably at 90 ° C, for 60 to 120 min and then at 300 ° to 600 °, especially at 350 to 600 ° C, more preferably at 350 ° to 450 °, in particular at 400 ° C for 1 -4 hours is annealed. 17. Ti0 ₂ -containing shaped bodies obtainable by the process according to one of claims 13 to 16. 18. Use of the pulverulent Katalysatorprecursormaterials according to one of claims 1 to 6 for the production of moldings, in particular for catalytic use or as a support for a catalytically active metal for use in the field of catalysis such as photocatalysis, Claus catalysis, Claus tail gas treatment , SCR, hydrotreating, gas-to-liquid process, Fischer-Tropsch process. 19. Use of the Ti0 ₂ -containing shaped bodies according to claim 17 as a catalyst or as a support for a catalytically active metal for use in the field of catalysis such as photocatalysis, Claus catalysis, Claus tail gas treatment, SCR, hydrotreating, gas to-liquid method, Fischer-Tropsch method.