CN108329719B - Production method of titanium dioxide with high gloss and low oil absorption - Google Patents
Production method of titanium dioxide with high gloss and low oil absorption Download PDFInfo
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- CN108329719B CN108329719B CN201810375592.3A CN201810375592A CN108329719B CN 108329719 B CN108329719 B CN 108329719B CN 201810375592 A CN201810375592 A CN 201810375592A CN 108329719 B CN108329719 B CN 108329719B
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 44
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 58
- 239000000243 solution Substances 0.000 claims abstract description 57
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 19
- 239000003513 alkali Substances 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 230000002378 acidificating effect Effects 0.000 claims abstract description 12
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012266 salt solution Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 6
- DCRIQAAPAFMPKP-UHFFFAOYSA-N aluminum oxygen(2-) titanium(4+) Chemical compound [O-2].[O-2].[Al+3].[Ti+4] DCRIQAAPAFMPKP-UHFFFAOYSA-N 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 7
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 claims 1
- 235000010215 titanium dioxide Nutrition 0.000 description 35
- 239000000843 powder Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000005406 washing Methods 0.000 description 8
- 230000032683 aging Effects 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002932 luster Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000006481 Colocasia esculenta Nutrition 0.000 description 1
- 240000004270 Colocasia esculenta var. antiquorum Species 0.000 description 1
- DNXNYEBMOSARMM-UHFFFAOYSA-N alumane;zirconium Chemical compound [AlH3].[Zr] DNXNYEBMOSARMM-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
- C09C1/3661—Coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/066—Treatment or coating resulting in a free metal containing surface-region
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Cosmetics (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
The invention discloses a production method of titanium dioxide with high gloss and low oil absorption, and the titanium dioxide aluminum coating comprises the following steps: 1) adjusting the pH value of the titanium dioxide slurry to 3-6 by adopting an acidic aluminum salt solution; 2) adding a metaaluminate solution and an acidic aluminum salt solution into the titanium dioxide slurry in a concurrent flow manner, and controlling the pH value of the slurry to be 3-6; 3) adjusting the pH value of the slurry obtained in the step 2) to 9-11 by using alkali liquor; 4) adding acid liquor and metaaluminate solution into the slurry obtained in the step 3) in a concurrent flow manner, and controlling the pH value of the slurry to be 9-11; 5) adjusting the pH value of the slurry obtained in the step 4) to 6-8 by using acid liquor. The invention can reduce the oil absorption of the product and ensure the product gloss to be unchanged by improving the aluminum-coated process of the titanium dioxide, and can save a certain amount of acid or alkali.
Description
Technical Field
The invention belongs to the field of titanium dioxide production, and particularly relates to a method for producing titanium dioxide with high gloss and low oil absorption.
Background
The inorganic coating of the domestic general titanium dioxide is usually a zirconium-aluminum coating, and the foreign advanced titanium dioxide enterprises also have silicon-aluminum coatings. Because the isoelectric point of the aluminum coating is pH 7-9, if the titanium white powder is coated with the aluminum film, the titanium white powder is easy to flocculate and agglomerate at the pH value, and the percolation amount of the titanium white powder in washing can be greatly reduced. Therefore, titanium dioxide which needs to be subjected to an inorganic coating process needs to be subjected to aluminum coating regardless of the application field. At present, most of aluminum coating processes are carried out on the alkali side, and aluminum coating is carried out by adding and controlling the aluminum and acid in parallel flow at a certain pH value or downstream coating. Acid side coating is also performed, and coating is generally performed with aluminum metal carbonate. The aluminum-coated crystal form with the pH value of less than 10 on the alkali side is a pseudo boehmite type or a boehmite type, and the luster of the product is generally better. The aluminum crystal form of the coating on the acid side is amorphous, the oil absorption is low, and the luster of the product is poor.
In the above-mentioned coating, both of the acid side and the alkali side, it is necessary to adjust the pH by consuming sulfuric acid and alkali to stabilize the pH at the pH of the coating, and to adjust the pH to be neutral after the completion of the coating to flocculate the slurry. The salt generated by acid-base neutralization is finally discharged to a sewage station, which causes resource waste.
Disclosure of Invention
In view of the above situation, the invention aims to provide a method for producing titanium dioxide with high gloss and low oil absorption. Firstly, aluminum metal salt and meta-aluminate are used for parallel flow coating on an acid side, then the pH value is adjusted to an alkali side, and then the rest aluminum film is coated, so that on one hand, the oil absorption of the product can be reduced, simultaneously, the luster of the product is ensured to be unchanged, and on the other hand, a certain amount of alkali can be saved.
The invention provides a production method of titanium dioxide with high gloss and low oil absorption, and the titanium dioxide aluminum coating comprises the following steps:
1) adjusting the pH value of the titanium dioxide slurry to 3-6 by adopting an acidic aluminum salt solution;
2) adding a metaaluminate solution and an acidic aluminum salt solution into the titanium dioxide slurry in a concurrent flow manner, and controlling the pH value of the slurry to be 3-6;
3) adjusting the pH value of the slurry obtained in the step 2) to 9-11 by using alkali liquor;
4) adding acid liquor and metaaluminate solution into the slurry obtained in the step 3) in a concurrent flow manner, and controlling the pH value of the titanium dioxide slurry to be 9-11;
5) adjusting the pH value of the slurry obtained in the step 4) to 6-8 by using acid liquor.
The concentration of the titanium dioxide slurry in the invention can be selected from the conventional concentration in the coating process in the field, for example, the concentration of the titanium dioxide slurry can be 50-500 g/L.
Preferably, the acidic aluminum salt solution is AlCl3、Al2(SO4)3Or Al (NO)3)3And (3) solution.
Further preferably, Al2O3The quality of the acidic aluminum salt solution is measuredThe concentration is 40-150g/L, preferably 60-100 g/L.
Preferably, the metaaluminate solution is NaAlO2Or KAlO2And (3) solution.
Further preferably, Al2O3The mass concentration of the metaaluminate solution is 40-150g/L, preferably 60-100 g/L.
In the invention, the alkali liquor can be NaOH, (NH)4)2CO3Or NH4OH solution, preferably (NH)4)2CO3Or NaOH solution.
The mass concentration of the alkali liquor can be 3-20%, and is preferably 8-16%.
According to the invention, the acid solution is a sulfuric acid solution with a mass concentration of 3-30%, preferably 3-10%.
In the invention, the amount of the aluminum clad film in the step 4) is 0.2-0.8%.
According to the invention, after the pH value is adjusted in the step 5), the reaction is finished after aging for 30-90 minutes, and the finished product is obtained by filtering, washing and drying the vapor powder.
According to a preferred embodiment of the invention, the production method of the titanium dioxide with high gloss and low oil absorption comprises the following steps: adjusting the pH value of the titanium dioxide slurry to 3-6 by adopting an acidic aluminum salt solution which is AlCl3、Al2(SO4)3Or Al (NO)3)3Solution of Al2O3The mass concentration is 60-100 g/L; adding a metaaluminate solution and an acidic aluminum salt solution into the titanium dioxide slurry in a concurrent flow manner, controlling the pH value of the titanium dioxide slurry to be 3-6, wherein the metaaluminate solution is NaAlO2Or KAlO2Solution of Al2O3The mass concentration is 60-100 g/L; adjusting the pH value of the titanium dioxide slurry to 9-11 by using alkali liquor, wherein the alkali liquor is (NH)4)2CO3Or NaOH solution with the mass concentration of 8-16%; adding acid liquor and metaaluminate solution into the titanium dioxide slurry in a concurrent flow manner, controlling the pH value of the titanium dioxide slurry to be 9-11, wherein the aluminum-clad film amount in the step is 0.2-0.8%; using acid liquor to make titanium dioxide slurryAdjusting the pH value of the mixed solution to 6-8, aging the acid solution which is a sulfuric acid solution with the mass concentration of 3-10% for 30-90 minutes, finishing the reaction, filtering and washing, and drying vapor powder to obtain a finished product.
By adopting the production method, aluminum metal salt and meta-aluminate are firstly used for parallel flow coating on the acid side, then the pH value is adjusted to the alkali side, and then the residual aluminum film is coated, so that on one hand, the oil absorption of the product can be effectively reduced, and simultaneously, the gloss of the product is ensured to be unchanged, and on the other hand, a certain amount of alkali can be saved.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples 1-3 illustrate the production of titanium dioxide with high gloss and low oil absorption according to the invention.
Example 1
A production method of titanium dioxide with high gloss and low oil absorption comprises the following steps: the mass concentration is 40g/L (by Al)2O3Meter) of AlCl3The pH value of titanium dioxide slurry (100 g/L) is adjusted to 3-6 by the solution; the mass concentration is 40g/L (by Al)2O3Calculated) of NaAlO2Solution and AlCl with the mass concentration of 40g/L3Adding the solution into the slurry in a parallel flow manner, and controlling the pH value of the slurry to be 3-6; using 3% NH by mass4The pH value of the slurry is adjusted to 9-11 by the OH solution; mixing 3% sulfuric acid solution and 40g/L NaAlO2Adding the solution into the slurry in a parallel flow manner, controlling the pH value of the slurry to be 9-11, and controlling the aluminum coating amount in the step to be 0.5%; adjusting the pH value of the slurry to 6-8 by using a sulfuric acid solution with the mass concentration of 3%, aging for 30-90 minutes, finishing the reaction, filtering, washing, and drying vapor powder to obtain a finished product.
Example 2
A production method of titanium dioxide with high gloss and low oil absorption comprises the following steps: the mass concentration is 100g/L (by Al)2O3Meter) A ofl(NO3)3The pH value of titanium dioxide slurry (300 g/L) is adjusted to 3-6 by the solution; the mass concentration is 100g/L (by Al)2O3Calculated) of NaAlO2Solution and AlCl with the mass concentration of 100g/L3Adding the solution into the slurry in a parallel flow manner, and controlling the pH value of the slurry to be 3-6; with a mass concentration of 12% (NH)4)2CO3The pH value of the slurry is adjusted to 9-11 by the solution; mixing a sulfuric acid solution with the mass concentration of 6 percent and NaAlO with the mass concentration of 100g/L2Adding the solution into the slurry in a parallel flow manner, controlling the pH value of the slurry to be 9-11, wherein the aluminum coating amount in the step is 0.2% of the total aluminum coating amount; adjusting the pH value of the slurry to 6-8 by using a sulfuric acid solution with the mass concentration of 10%, aging for 30-90 minutes, finishing the reaction, filtering, washing, and drying vapor powder to obtain a finished product.
Example 3
A production method of titanium dioxide with high gloss and low oil absorption comprises the following steps: the mass concentration is 150g/L (by Al)2O3Calculated) Al of2(SO4)3The pH value of titanium dioxide slurry (400 g/L) is adjusted to 3-6 by the solution; the mass concentration is 150g/L (by Al)2O3Meter) of KAlO2Solution and Al with the mass concentration of 150g/L2(SO4)3Adding the solution into the slurry in a parallel flow manner, and controlling the pH value of the slurry to be 3-6; adjusting the pH value of the slurry to 9-11 by using NaOH solution with the mass concentration of 20%; mixing a sulfuric acid solution with a mass concentration of 30% and KAlO with a mass concentration of 150g/L2Adding the solution into the slurry in a parallel flow manner, controlling the pH value of the slurry to be 9-11, wherein the aluminum coating amount in the step is 0.8 percent of the total aluminum coating amount; adjusting the pH value of the slurry to 6-8 by using a sulfuric acid solution with the mass concentration of 8%, aging for 30-90 minutes, finishing the reaction, filtering, washing, and drying vapor powder to obtain a finished product.
Comparative example 1
A production method of titanium dioxide with high gloss is disclosed, wherein the titanium dioxide aluminum coating comprises the following steps: adjusting pH value of slurry (100 g/L) to 9-10 with 10% NaOH, and then adopting mass concentration of 40g/L (using Al)2O3Calculated) of NaAlO2Solution and mass concentrationAdding 3% sulfuric acid solution in parallel, controlling the pH value of the slurry to be 9-11, adjusting the pH value of the slurry to be 6-8 by using the 3% sulfuric acid solution after the reaction is finished, aging for 30-90 minutes, finishing the reaction, filtering, washing, and drying vapor powder to obtain a finished product.
Comparative example 2
A production method of titanium dioxide with low oil absorption comprises the following steps: with H at a concentration of 10%2SO4The pH value of the slurry (100 g/L) is adjusted to 3-6, and then the slurry with the mass concentration of 40g/L (taking Al)2O3Calculated) Al of2(SO4)3Adding the solution and NaOH solution with the mass concentration of 10% in a concurrent flow manner, controlling the pH value of the slurry to be 3-6, adjusting the pH value of the slurry to be 6-8 by using 10% NaOH solution after the reaction is finished, aging for 30-90 minutes, finishing the reaction, filtering, washing, and drying vapor powder to obtain a finished product.
The performance parameters of the titanium dioxide produced in examples 1 to 3 and comparative examples 1 to 2 are shown in Table 1.
TABLE 1
As can be seen from the examples and comparative examples, the titanium dioxide prepared by the method of the invention has low oil absorption, the product gloss is basically unchanged, and the alkali or acid dosage can be saved by more than 40%.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (5)
1. A production method of titanium dioxide with high gloss and low oil absorption is characterized in that the titanium dioxide aluminum coating comprises the following steps:
1) adjusting the pH value of the titanium dioxide slurry to 3 by adopting an acidic aluminum salt solution;
2) adding a metaaluminate solution and an acidic aluminum salt solution into the titanium dioxide slurry in a concurrent flow manner, and controlling the pH value of the slurry to be 3;
3) adjusting the pH value of the slurry obtained in the step 2) to 9-11 by using alkali liquor;
4) adding acid liquor and metaaluminate solution into the slurry obtained in the step 3) in a concurrent flow manner, and controlling the pH value of the slurry to be 9-11;
5) adjusting the pH value of the slurry obtained in the step 4) to 6-8 by using acid liquor;
with Al2O3The mass concentration of the acidic aluminum salt solution is 40-150 g/L;
with Al2O3The mass concentration of the metaaluminate solution is 40-150 g/L;
the amount of the aluminum clad film in the step 4) is 0.2-0.8%.
2. The process for producing titanium dioxide with high gloss and low oil absorption according to claim 1, wherein: the acidic aluminum salt solution is AlCl3、Al2(SO4)3Or Al (NO)3)3And (3) solution.
3. The process for producing titanium dioxide with high gloss and low oil absorption according to claim 1, wherein: the metaaluminate solution is NaAlO2Or KAlO2And (3) solution.
4. The process for producing titanium dioxide with high gloss and low oil absorption according to claim 1, wherein: the alkali liquor is NaOH or NH4The mass concentration of the OH solution is 3-20%.
5. The process for producing titanium dioxide with high gloss and low oil absorption according to claim 1, wherein: the acid solution is a sulfuric acid, hydrochloric acid or nitric acid solution with the mass concentration of 3-30%.
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| CN108329719B true CN108329719B (en) | 2020-03-20 |
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| CN108864771A (en) * | 2018-09-05 | 2018-11-23 | 襄阳龙蟒钛业有限公司 | It is a kind of for producing the coating agent of high glaze titanium dioxide |
| CN114479519A (en) * | 2021-12-28 | 2022-05-13 | 龙佰襄阳钛业有限公司 | Method for improving fluidity of titanium dioxide coating slurry |
| CN115594994B (en) * | 2022-10-25 | 2024-03-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of titanium dioxide special for high-gloss printing ink |
| CN115584147A (en) * | 2022-10-25 | 2023-01-10 | 攀钢集团攀枝花钢铁研究院有限公司 | A coating method of special titanium dioxide for printing ink |
| CN115746583B (en) * | 2022-12-08 | 2024-08-27 | 龙佰禄丰钛业有限公司 | Method for producing titanium dioxide by composite parallel flow film coating |
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