RU2199387C1 - Catalyst for extensive oxidation of organics and carbon monoxide in gas emissions and method of preparation thereof (versions) - Google Patents

Abstract

FIELD: oxidation catalysts. SUBSTANCE: alumina-based catalyst contains (on conversion to oxides) 2-15% chromium oxide, 2-15% copper oxide, at least one additional element selected from alkali and alkali-earth metals, silicon, iron, magnesium, titanium, zirconium, and cerium in amounts from 0.01 to 45% and 2 to 15% of promoter: at least one compound of metal from following group: magnesium, nickel, manganese, cobalt, iron, and vanadium. Catalyst preparation procedures: (1) chromium and copper compounds, aluminum hydroxide, additional compound, and promoter are mixed and resulting mixture is molded, dried, and calcined; (2) alumina carrier bearing and additional compound is impregnated with solution containing chromium and copper compounds and promoter, dried, and calcined. EFFECT: enhanced catalytic activity in oxidation reactions, especially in presence of sulfur compounds, and increased mechanical strength. 10 cl, 1 dwg, 2 tbl, 11 ex

Description

 The invention relates to catalysts and methods for producing oxide catalysts used in the processes of deep oxidation of organic compounds and carbon monoxide in gas emissions from industrial plants.

Known high-temperature oxidation catalyst (US Patent 4968661, IPC ⁵ B 01 J 21/06, B 01 J 23/02, 1990) having the formula [A _u -MO _w (DO _x ) (EO _y ) _a ] _z , where A - alkaline or alkaline earth metal; M - V, Cr, Mo, Mn, Fe, Co, Ni, Cu or a mixture of two or more elements; D is Zr, Ti, Hf, Ce, Th, Pr, Nb, Ta, W, Re, or a mixture of two or more elements; E - Ca, Mg, Sr, Ba, Y, La, Yb, Sm, Gd, Nd, Sc, V, Bi, Ce, Pr, Eu, Tb, Dy, Ho, Er, Tm, Lu, or a mixture of two or more elements; a = 0-0.2; u is 0-1; z is 10-100; w is the number of oxygen atoms necessary to ensure the required valency of A and M; x is the number of oxygen atoms necessary to provide the required valency D; y is the number of oxygen atoms necessary to provide the required valency E.

 The catalyst has not enough high activity and resistance to catalytic poisons.

A known catalyst for the purification of gases from carbon monoxide and organic substances (RF Patent 2002498, IPC B 01 J 23/84, B 02 D 53/36, 1993) containing spinel of the general formula AB ₂ O ₄ , where A and B include copper cations and chromium, O is oxygen. As A, the catalyst contains cations of zinc, cadmium, iron, cobalt, and as B contains chromium and additional cations of iron, nickel, and copper. In this case, the catalyst is a solid solution of spinels with the content of metal cations simultaneously present in it.

 The lack of catalyst is low activity.

A known low-temperature oxidation catalyst (UK Application 2234450, IPC B 01 J 23/40, 1991) containing at least one noble metal (platinum, palladium, rhodium) on a support and capable of reducing a metal oxide such as Fe ₂ O ₃ , Ce ₂ O ₃ , ZrO ₂ , CuO, rare earth metal oxides, MnO ₂ , V ₂ O ₅ and Cr ₂ O ₃ . The active component (a noble metal and reducible metal oxide) can be deposited on an inert substrate such as alumina or carbon cloth.

 The disadvantage of the catalyst is the presence in its composition of metals of the platinum and rare earth groups, which are unstable to poisoning by catalytic poisons.

A known catalyst for cleaning gas emissions (Japanese Application No. 59-44897, IPC ³ B 01 J 23/89 // B 01 D 53/36, 1984), which contains a platinum group metal deposited on a carrier containing calcium aluminate, metal oxide, for example Mn, Cu, Co, Ni, Cr and Fe, and complex oxides, for example ZnFe ₂ O ₃ and MnFe ₂ O ₃ .

 The disadvantage of the catalyst is the presence in its composition of platinum group metals, which are unstable to poisoning by catalytic poisons.

The closest technical solution is a catalyst for the purification of gases from carbon monoxide (Ed. Certificate. USSR 1121032, IPC B 01 J 23/86, 1984), which includes CuO and Cr ₂ O ₃ and additionally contains manganese dioxide and chamotte carrier in the following the ratio of components, wt.%:
Copper oxide - 1.4-3.5
Chromium oxide - 1.3-2.0
Manganese Dioxide - 10.1-11.6
Chamotte - The rest
The disadvantage of this method is that the resulting catalyst does not have a sufficiently high catalytic activity, mechanical strength and stability.

 The problem solved by the present invention is the development of a catalyst for the deep oxidation of hydrocarbons and carbon monoxide in gas emissions with high activity, stability, resistance to catalytic poisons and methods for its production (options).

The problem is solved using a catalyst for the deep oxidation of organic compounds and carbon monoxide in gas emissions, including chromium, copper, aluminum compounds, an additional compound, a promoter. The catalyst contains as an additional compound at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium, as a promoter, at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium in the following ratio of components in terms of oxides, wt.%:
Chromium oxide - 2-15
Copper oxide - 2-15
The oxide of at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium - 2-15
The oxide of at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium - 0.01-45
Alumina - Else
The aluminum compound precursor is preferably a product obtained by rapid dehydration of aluminum trihydroxide and having the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0. An aluminum compound may contain at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron in an amount of 0.01-2.0, calculated as oxides, wt.% (For example, according to the patent of the Russian Federation 2148017 from 27.04 .2000).

 The problem is also solved by the methods (options) for obtaining the above catalyst for the deep oxidation of organic compounds and carbon monoxide in gas emissions.

The first method consists in mixing chromium, copper, aluminum compounds, an additional compound, a promoter, followed by molding, drying and calcination. As the aluminum compound, a hydrated aluminum compound of the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0, is able to form basic aluminum salts with acids, which is mixed with at least one additional compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium, oxygen-containing compounds of chromium, copper and a promoter — at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium, are added to the resulting composition then enter stifikator until a plastic mass is formed, followed by wilting granules were dried, calcined at a temperature of 500-600 ^o C to give a catalyst with the following ratio of components, calculated as oxides, wt.%:
Chromium oxide - 2-15
Copper oxide - 2-15
The oxide of at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium - 2-15
The oxide of at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium - 0.01-45
Alumina - Else
Organic or inorganic acids capable of forming basic soluble aluminum salts are used as a plasticizer.

The aluminum compound precursor is preferably a product obtained by rapid dehydration of aluminum trihydroxide and having the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0. An aluminum compound may contain at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron in an amount of 0.01-2.0, calculated as oxides, wt.% (For example, according to the patent of the Russian Federation 2148017 from 27.04 .2000).

The second method for producing a catalyst for the deep oxidation of organic compounds and carbon monoxide in gas emissions consists in impregnating a support comprising an aluminum compound, an additional compound, with a solution containing chromium, copper compounds and a promoter, drying and calcining. The carrier used is a composition of an aluminum compound with at least one additional compound of an element from the group: alkali and alkaline earth metals, silicon, titanium, zirconium, cerium, which is impregnated with a solution containing chromium, copper compounds and a promoter - at least one compound metal from the group: magnesium, nickel, manganese, cobalt, iron, vanadium, calcined impregnated carrier at a temperature of up to 500-600 ^o With and get the catalyst in the following ratio of components in terms of oxides, wt.%:
Chromium oxide - 2-15
Copper oxide - 2-15
The oxide of at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium - 2-15
The oxide of at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium - 0.01-45
Alumina - Else
The aluminum compound precursor is preferably a product obtained by rapid dehydration of aluminum trihydroxide and having the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0. An aluminum compound may contain at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron in an amount of 0.01-2.0, calculated as oxides, wt.% (For example, according to the patent of the Russian Federation 2148017 from 27.04 .2000).

 Compounds of chromium, copper and promoters are introduced into the catalyst by any known methods.

 The proposed methods allow to obtain a catalyst of various compositions, which can be selected depending on operating conditions, gas humidity, the presence of harmful impurities, etc. When implementing both methods of producing a catalyst, there are no toxic gas emissions and wastewater.

In the proposed solution for the preparation of the catalyst, a hydrated aluminum compound is used, which can be obtained by various known methods: by nitrate, sulfate or aluminate technology, reprecipitation, thermal activation of Al (OH) ₃ , rapid dehydration of aluminum hydroxide (hydrargillite, technical alumina), shock heat treatment hydrargillite et al., however, preferred to prepare the catalyst composition is the product al ₂ O ₃ • nH ₂ O, where n = 0,03-2,0, which is obtained by rapid dehydration of t igidroksida aluminum, has a layered structure of amorphous and capable of forming acid-soluble basic aluminum salt. This product may contain at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron in an amount of 0.01-2.0, calculated on oxides, wt.% (For example, according to the patent of the Russian Federation 2148017 dated 04/27/2000), which may be partially present in the starting products or are introduced before fast partial dehydration by any known methods, for example, by impregnation or coprecipitation. During the heat treatment of catalyst granules based on such a hydrated aluminum compound, a catalyst is formed on the modified surface of the aluminum compound, which ensures the formation of strong bonds of the aluminum compound with other catalyst components and, as a result, leads to a catalyst with higher rates: strength, stability.

 Introduction to the composition of the proposed catalyst compounds of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium in an amount of 0.01-45, in terms of oxides, wt.% Leads to increased catalyst stability, resistance to catalytic poisons and increases the life of the catalysts.

 The introduction of the proposed promoters in the catalyst leads to an increase in catalytic activity. In this case, the catalysts retain high stability, resistance to catalytic poisons and have a sufficiently high strength.

So, the proposed catalyst retains high catalytic activity and stability in the oxidation reaction of a model mixture containing 0.5 vol. % propane, and a mixture containing 0.5 vol.% propane and 0.1 vol.% SO ₂ compared with the prototype (see drawing).

 The activity of the catalyst was determined on a true grain in a flow-circulation installation during deep oxidation in excess of oxygen on model mixtures containing n-butane or carbon monoxide.

The reaction rate (cm ³ C ₄ H ₁₀ / G cat. • C) of n-butane oxidation at 400 ^° C was taken as a measure of the catalytic activity of the catalyst in the deep oxidation of n-butane. A higher rate of the reaction of complete oxidation of n-butane corresponds to more active catalyst.

 The temperature at which an 85% degree of oxidation of carbon monoxide is reached is taken as a measure of the catalytic activity of the catalyst in the deep oxidation of carbon monoxide reaction. The lower the temperature at which the carbon monoxide reaches 85% oxidation, the higher the activity of the catalyst.

The activity and stability of the catalyst with respect to catalytic poisons was determined in the oxidation reaction of a model mixture containing 0.5 vol.% Propane and a mixture containing 0.5 vol.% Propane + 0.1 vol.% SO ₂ in excess oxygen, a temperature of 500 ^{° C.} and was evaluated by the oxidation state of propane at the indicated temperature.

 The mechanical strength of the granules by crushing along the generatrix was determined on the MP-9C device. As a measure of mechanical strength, the ultimate compressive force is taken at which the destruction of the granules occurs, referred to the conditional section.

 The following examples illustrate the invention.

Example 1
To prepare the catalyst, 452 g of hydrated aluminum compound of the composition Al ₂ O ₃ • nH ₂ O, where n = 2.0, is used. To the aluminum compound was added 20 g of wood flour, as an additional compound 450 g of silica, pre-ground, and mixed. Then, 131.6 g of an oxygen-containing chromium compound (chromium oxide) is introduced into the composition, 100 g of copper oxide obtained by thermal decomposition of basic copper carbon dioxide, 20 g of vanadium oxide are added as a promoter and mixing is continued. Plasticization of the catalyst charge is carried out with an aqueous solution of nitric acid at the rate of 0.2 mol of HNO ₃ per 1 mol of aluminum oxide, then granules with a diameter of 4.5 mm are formed by extrusion. The stage of drying in air is carried out for 10-12 hours, dried at 120 ^{° C. for} 6 hours and calcined at 500 ^{° C. for} 6 hours.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 10.0
Copper oxide - 10.0
Vanadium Oxide - 2.0
Silica - 45.0
Alumina - Else
According to x-ray phase analysis, the composition of the catalyst is a structure of simple and complex oxides of elements, compounds of several elements (aluminum, copper, chromium, vanadium) with a structure such as solid solutions.

Example 2
931.5 g of hydrated aluminum compound (n = 1.5) containing the sodium compound is mixed with 10 g of polyethylene oxide, 80 g of magnesium oxide and 20 g of cerium oxide are added as additional compounds and mixed again. 26.3 g of chromium oxide, 208.6 g of basic carbon dioxide of copper are introduced into the resulting composition as a promoter of 50 g of manganese dioxide and the mixing of the components is continued. Plasticization of the catalyst charge is carried out with an aqueous solution of nitric acid at the rate of M _k = 0.15 to a plastic state. As ready, the catalyst mass is formed into granules with a diameter of 4.5 mm The granules are dried in air, dried and calcined at 600 ^o C.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 2.0
Copper oxide - 15.0
Manganese Oxide - 5.0
Magnesium Oxide - 8.0
Cerium Oxide - 2.0
Alumina - Else,
including

Sodium oxide - 0.01
The phase composition of the catalyst is a structure including complex oxides of several elements, compounds of elements with a crystal lattice of the spinel type and simple oxides of elements.

Example 3
The catalyst is prepared analogously to example 2, but the catalyst mixture contains 753.4 g of hydrated aluminum compound, 50 g of wood flour, as additional compounds 200 g of silicon oxide, pre-ground, 5 g of titanium oxide and 25 g of calcium oxide; 197.4 g of chromium oxide, 20 g of copper oxide, as a promoter of 50 g of cobalt oxide. Plasticization of the catalyst charge is carried out with an aqueous solution of a mixture of nitric and glacial acetic acids at the rate of M _k = 0.2.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 15.0
Copper oxide - 2.0
Cobalt oxide - 5.0
Silica - 20.0
Titanium Oxide - 0.5
Calcium Oxide - 2.5
Alumina - Else
The phase composition of the catalyst is a structure consisting of simple and complex oxides of elements, oxygen-containing compounds of elements (aluminum, cobalt, copper) with a crystal lattice such as spinel, compounds of elements with a structure such as solid solutions and unidentified compounds.

Example 4
The catalyst is prepared analogously to example 2, but the catalyst mixture contains 835.6 g of hydrated aluminum compound Al ₂ O ₃ • nH ₂ O, where n = 1.0, containing potassium and barium compounds; 50 g of polyethylene oxide; as additional compounds, 160.6 g of iron hydroxide and 30 g of zirconium dioxide; 109.8 g of an oxygen-containing chromium compound (chromium hydroxide, hydrate); 41.7 g of basic copper carbonate and 72.3 g of magnesium hydroxide, 50 g of manganese dioxide and 50 g of iron oxide as promoters. Plasticization of the catalyst charge is carried out with an aqueous solution of a mixture of nitric and oxalic acids at the rate of M _k = 0.2, then the catalyst mass is molded in the form of rings (10-15 mm in diameter). The stage of drying is carried out in air, dried at 120 ^o C and calcined at 600 ^o C.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 6.0
Copper oxide - 3.0
Magnesium Oxide - 5.0
Manganese Oxide - 5.0
Iron oxide - 17.0
Zirconia - 3.0
Alumina - Else,
including

Potassium oxide - 0.02
Barium Oxide - 1.98
According to x-ray phase analysis, the composition of the catalyst is a structure of simple and complex oxides of elements, compounds of several elements (aluminum, copper, magnesium, manganese) with a structure such as solid solutions and unidentified compounds.

Example 5
The catalyst is prepared using 1000 g of a hydrated aluminum compound of the composition Al ₂ O ₃ • nH ₂ O, where n = 1.9; add 20 g of wood flour; as an additional compound, a cerium compound is used - 0.1 g of cerium dioxide. The composition is thoroughly mixed, then chromium and copper compounds are introduced into it: 100 g of chromium oxide and 104.3 g of basic copper carbon dioxide; 30 g of magnesium oxide and 53.41 g of nickel acetic acid are added as a promoter and mixing is continued. The catalyst charge is plasticized with an aqueous solution of a mixture of nitric and glacial acetic acids at the rate of M _k = 0.15 to a plastic state. As ready, the catalyst mass is formed by extrusion into granules with a diameter of 4.2 mm The granules are dried in air, dried and calcined at 550 ^o C.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 10.0
Copper oxide - 7.5
Nickel oxide - 2.5
Magnesium Oxide - 3.0
Cerium oxide - 0.01
Alumina - Else
The phase composition of the catalyst is a simple and complex oxides of elements, compounds of elements (aluminum, copper, magnesium, nickel) with a structure such as solid solutions.

Example 6
Using 490.4 g of hydrated aluminum compound (n = 0.03), 50 g of polyethylene oxide and, as additional compounds, 290 g of silicon oxide and 160 g of magnesium oxide, previously ground, a porous support composition (808 g) was prepared by mixing (diameter 4 , 5 mm, specific surface 200 m ² / g, water capacity 1.0 ml / g), which is then impregnated according to water capacity with an aqueous solution with a concentration of elements, mg / ml: chromium 108.39; copper 33.61; iron (promoter) 28.86. As compounds of chromium, copper and iron, acetic acid salts are used. The carrier is impregnated with a solution at room temperature in a rotary drum impregnator, the impregnated carrier is dried in a stream of hot air at 120 ^° C, and the catalyst is calcined at temperatures up to 550 ^° C.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 12.8
Copper oxide - 3.4
Iron Oxide - 3.0
Silica - 29.0
Magnesium Oxide - 16.0
Alumina - Else
According to x-ray phase analysis, the composition of the proposed catalyst includes simple and complex element oxides and crystallized mixed oxygen-containing compounds of elements (copper, chromium, iron) with a spinel-type crystal lattice.

Example 7
The catalyst is prepared analogously to example 6, but the composition of the refractory porous carrier (770 g) is prepared by mixing, using 1027.4 g of hydrated aluminum compound containing compounds of sodium, potassium, iron, calcium; 70 g of wood flour and, as an additional compound, 20 g of zirconium dioxide (specific surface 215 m ² / g, outer diameter of the rings 10 mm, moisture capacity 1.0 ml / g). For impregnation of the carrier using a solution with a concentration of elements, mg / ml: chromium 154.6; copper 20.74; magnesium (promoter) 28.2. To prepare the impregnating solution, acetic acid salts of chromium, copper, and magnesium are used.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 17.4
Copper oxide - 2.0
Magnesium Oxide - 3.6
Zirconia - 2.0
Alumina - Else,
including

Sodium oxide - 0.08
Potassium oxide - 0.02
Iron Oxide - 0.9
Calcium Oxide - 1.0
According to x-ray phase analysis, the composition of the proposed catalyst is a structure that includes simple oxides of elements, compounds of elements (aluminum, copper, magnesium) such as solid solutions and mixed crystalline compounds of elements (copper, magnesium, chromium) like spinel.

Example 8
Using 1026.71 g of a hydrated aluminum compound containing magnesium, silicon and barium compounds, 40 g of wood flour and, as an additional compound, 100 g of titanium dioxide, a porous support composition (849.5 g) was prepared by mixing (specific surface 170 m ² / g, water capacity 0.9 ml / g, outer diameter of the rings 10 mm), which is then impregnated at room temperature in stages: first with an aqueous solution with a concentration of elements, mg / ml: chromium 59.92 and copper 36.55. The impregnated carrier is dried in a stream of hot air at a temperature of up to 200 ^o C for 6 hours, cooled.

Re-impregnation is carried out with an aqueous solution with a concentration of elements, mg / ml: cobalt 31.11 and nickel 15.39. The impregnated carrier is again dried in a stream of hot air at a temperature of up to 120 ^o C for 6 hours and is subjected to heat treatment stepwise to a temperature of 600 ^o C.

 As compounds of chromium, copper and compounds of promoters - cobalt and nickel, acetic salts are used.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 6.70
Copper oxide - 3.50
Cobalt oxide - 3.35
Nickel oxide - 1.50
Titanium oxide - 10.00
Alumina - Else,
including

Magnesium Oxide - 0.3
Silica - 0.1
Barium oxide - 0.5
The phase composition of the catalyst is a complex structure, including compounds of several elements (aluminum, titanium, magnesium, silicon, barium) such as solid solutions; complex oxygen-containing oxides of elements; compounds of elements (aluminum, copper, cobalt, nickel) with a spinel-type crystal lattice and unidentified compounds.

Example 9
For the preparation of the catalyst using 623.29 g of hydrated aluminum compounds. 10 g of polyethylene oxide was added to the aluminum compound, and 113.74 g of hydrated iron compound and 289.33 g of hydrated magnesium compound were added as additional compounds. The mixture is thoroughly mixed and partially plasticizer is added (~ 30-35% of the total volume of an aqueous solution of nitric acid at the rate of M _k = 0.2) and mixing continues until a homogeneous mass is obtained.

 Then, 30 g of copper oxide, 20 g of magnesium oxide, 20 g of iron oxide and 230.26 g of chromium oxide are introduced into the resulting composition. Compounds of magnesium and iron are used as promoters. The remainder of the plasticizer is introduced into the catalyst mixture and mixed until it is plastic.

As ready, the catalyst mass is formed into granules with a diameter of 4.0 mm The granules are dried in air, dried and calcined at 600 ^o C.

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 17.5
Copper oxide - 3.0
Magnesium Oxide - 22.0
Iron oxide - 12.0
Alumina - Else
The phase composition of the catalyst is a structure comprising simple element oxides; complex mixed compounds of elements (aluminum, copper, magnesium, iron, chromium) with a structure such as spinel and solid solutions, and unidentified compounds.

Example 10
The catalyst is prepared analogously to example 6, but as the carrier, a composition is used which is prepared by mixing using 438.36 g of hydrated aluminum compound containing magnesium compounds; 50 g of wood flour and, as an additional compound, 430 g of magnesium oxide. The specific surface of the carrier is 207 m ² / g, the water capacity is 1.0 ml / g, and the cylinder diameter is 4.0 mm.

Then 750 g of the carrier is impregnated at room temperature in terms of moisture capacity with a water-alcohol solution (in a 4: 1 ratio) with a concentration of elements, mg / ml: chromium 72.98; copper 21.30; and magnesium (promoter) 120.61. The impregnated carrier is dried in a stream of hot air at temperatures up to 150 ^o C and subjected to heat treatment stepwise to temperatures of 600 ^o C.

 Oxides are used as chromium and copper compounds, and acetic acid salt is used as a magnesium compound (promoter).

The proposed catalyst has the following composition in terms of oxides, wt.%:
Chromium oxide - 8.0
Copper oxide - 2.0
Magnesium Oxide - 58.0
Alumina - Else,
including

Magnesium Oxide - 2.0
The phase composition of the catalyst is a complex structure, including complex and simple oxides of elements, mixed compounds of elements (aluminum, copper, magnesium) with a structure like spinel, oxygen-containing compounds of elements (aluminum, copper, magnesium, chromium) such as solid solutions.

Example 11 (prototype)
840 g of fireclay, 30 g of copper oxide, 20 g of chromium oxide, 110 g of manganese dioxide are mixed and moistened with a plasticizer until a homogeneous mass is obtained. The resulting mass is extruded into granules with a diameter of 6-7 mm. Calcination is carried out at a temperature of 600 ^o C for 6 hours.

The catalyst has the following composition, wt.%:
Copper oxide - 3.0
Chromium oxide - 2.0
Manganese Dioxide - 11.0
Chamotte - The rest
Data on the composition of the catalysts according to the examples presented in table 1.

 Table 2 presents data on the catalytic activity in the reactions of deep oxidation of n-butane and carbon monoxide and the mechanical strength of the claimed catalyst and prototype. As can be seen from the table, the inventive catalyst has a higher catalytic activity in the above oxidation reactions and mechanical strength compared to the prototype.

The drawing shows the test results of the proposed catalyst and prototype in the oxidation reaction of propane and a mixture of propane with 0.1 vol.% SO ₂ . As can be seen from the drawing, the developed catalysts retain a rather high activity in the presence of sulfur compounds in comparison with the known solution.

Claims (7)

1. The catalyst for the deep oxidation of organic compounds and carbon monoxide in gas emissions, including compounds of chromium, copper, aluminum, an additional compound, a promoter, characterized in that the catalyst contains as an additional compound at least one compound of an element from the group: alkaline and alkaline - earth metals, silicon, iron, titanium, zirconium, cerium, as a promoter - at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium, in the following ratio components in terms of oxides, wt.%:
Chromium oxide - 2-15
Copper oxide - 2-15
The oxide of at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium - 2-15
The oxide of at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium - 0.01-45
Alumina - Else
2. The catalyst according to claim 1, characterized in that the precursor of the aluminum compound is a product obtained by the rapid dehydration of aluminum trihydroxide and having the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0.  3. The catalyst according to claim 1 or 2, characterized in that the aluminum compound contains at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron in an amount of 0.01-2.0 wt.% In terms of on oxides. 4. A method of producing a catalyst for deep oxidation of organic compounds and carbon monoxide in gas emissions by mixing chromium, copper, aluminum compounds, an additional compound, a promoter, followed by molding, drying and calcination, characterized in that a hydrated aluminum compound is used as an aluminum compound Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0, capable of forming basic aluminum salts with acids, which are mixed with at least one additional compound of an element from the group: full-time and alkaline-earth metals, silicon, iron, titanium, zirconium, cerium, oxygen-containing compounds of chromium, copper and a promoter — at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium, are added to the resulting composition then a plasticizer is introduced until a plastic mass is obtained, formed with subsequent drying of the granules, dried, calcined at 500-600 ^{° C.} , and a catalyst is obtained in the following ratio of components in terms of oxides, wt.%:
Chromium oxide - 2-15
Copper oxide - 2-15
The oxide of at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium - 2-15
The oxide of at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium - 0.01-45
Alumina - Else
5. The method according to claim 4, characterized in that as a plasticizer use organic or inorganic acids capable of forming basic soluble aluminum salts. 6. The method according to p. 4, characterized in that the hydrated aluminum compound of the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0, contains at least one compound of an element from the group: alkaline and alkaline earth metals, silicon, iron in an amount of 0.01-2.0 wt.% in terms of oxides. 7. The method according to p. 4, characterized in that the precursor of the aluminum compound is a product obtained by the rapid dehydration of aluminum trihydroxide, and having the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0. 8. A method of producing a catalyst for the deep oxidation of organic compounds and carbon monoxide in gas emissions by impregnating a carrier comprising an aluminum compound, an additional compound, with a solution containing chromium, copper compounds and a promoter, drying and calcining, characterized in that the composition is used as a carrier aluminum compounds with at least one additional compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium, which is impregnated with a solution rum, compounds containing chromium, copper and promoter - at least one compound of a metal from the group magnesium, nickel, manganese, cobalt, iron, vanadium, the impregnated carrier is calcined at temperatures up to 500-600 ^o C, and the catalyst was prepared in the following ratio in terms of oxides, wt.%:
Chromium oxide - 2-15
Copper oxide - 2-15
The oxide of at least one metal compound from the group: magnesium, nickel, manganese, cobalt, iron, vanadium - 2-15
The oxide of at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron, titanium, zirconium, cerium - 0.01-45
Alumina - Else
9. The method according to claim 8, characterized in that the aluminum compound contains at least one compound of an element from the group: alkali and alkaline earth metals, silicon, iron in an amount of 0.01-2.0 wt.% In terms of oxides . 10. The method according to claim 8, characterized in that the precursor of the aluminum compound is a product obtained by the rapid dehydration of aluminum trihydroxide and having the composition Al ₂ O ₃ • nH ₂ O, where n = 0.03-2.0.

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