CN111573723A - Method for producing titanium dioxide by using neutralization sulfuric acid method - Google Patents
Method for producing titanium dioxide by using neutralization sulfuric acid method Download PDFInfo
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- CN111573723A CN111573723A CN202010361987.5A CN202010361987A CN111573723A CN 111573723 A CN111573723 A CN 111573723A CN 202010361987 A CN202010361987 A CN 202010361987A CN 111573723 A CN111573723 A CN 111573723A
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- titanium dioxide
- slurry
- neutralization
- metatitanic acid
- sulfate
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 57
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 41
- 239000002253 acid Substances 0.000 claims abstract description 38
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 15
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 15
- 239000004202 carbamide Substances 0.000 claims abstract description 15
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 15
- -1 fatty acid ester Chemical class 0.000 claims abstract description 12
- 239000012065 filter cake Substances 0.000 claims abstract description 11
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 10
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 10
- MRUAUOIMASANKQ-UHFFFAOYSA-N cocamidopropyl betaine Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O MRUAUOIMASANKQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229940073507 cocamidopropyl betaine Drugs 0.000 claims abstract description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 10
- 229930195729 fatty acid Natural products 0.000 claims abstract description 10
- 239000000194 fatty acid Substances 0.000 claims abstract description 10
- 239000004571 lime Substances 0.000 claims abstract description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 10
- 229920000223 polyglycerol Polymers 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 7
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 230000008020 evaporation Effects 0.000 claims abstract description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 6
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 6
- 235000011151 potassium sulphates Nutrition 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 229940103272 aluminum potassium sulfate Drugs 0.000 claims description 4
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 238000011085 pressure filtration Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000007062 hydrolysis Effects 0.000 abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 1
- 239000001038 titanium pigment Substances 0.000 abstract 1
- 235000013877 carbamide Nutrition 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 238000009826 distribution Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- 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
- C01P2006/12—Surface area
-
- 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
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
Abstract
The invention discloses a method for producing titanium dioxide by a neutralization sulfuric acid method, which comprises the steps of washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 6.5-7.5, performing filter pressing by a filter press, and adding water to adjust the pH value to be metatitanic acid slurry with titanium dioxide concentration of 150-250 g/L; adding sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to a temperature, uniformly stirring, standing for 2-4h, and neutralizing with ammonia water until the pH value is 6.5-7.5 to obtain hydrolysis slurry; adding a dispersing agent into the nano titanium dioxide slurry, carrying out filter pressing by a filter press, carrying out flash evaporation drying on a squeezed filter cake, and crushing to obtain titanium dioxide; the dispersing agent consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol. The method adds lime for neutralization after washing metatitanic acid, can reduce the discharge of waste acid in the production process of titanium pigment, and the prepared titanium pigmentThe specific surface area of the titanium dioxide is 360-380cm2The water dispersibility is more than 98 percent, calcium is introduced, and the prepared titanium dioxide has wide application prospect in the field of wastewater treatment.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a method for producing titanium dioxide by a neutralization sulfuric acid method.
Background
Titanium dioxide, i.e. titanium dioxide, is an important inorganic chemical raw material. Because of its non-toxicity, stable physical and chemical properties, it has excellent optical and electrical properties and excellent pigment performance, and can be extensively used in the fields of coating, printing ink, plastics, rubber, paper-making, chemical fibre, art pigment, daily cosmetics, enamel, ceramics and electronics, etc. The production method of titanium dioxide is mainly sulfuric acid process, and is characterized by that the titanium iron powder and concentrated sulfuric acid are undergone the process of acidolysis reaction to produce intermediate titanyl sulfate, the titanyl sulfate must be hydrolyzed into metatitanic acid and sulfuric acid, and the metatitanic acid is undergone the processes of water-washing, calcining and pulverizing so as to obtain the titanium dioxide product. The existing sulfuric acid method for producing titanium dioxide has the problems of large discharge amount of three wastes, easy corrosion of equipment, small specific surface area, poor dispersibility and the like.
Disclosure of Invention
In order to solve the problems, the invention provides a method for producing titanium dioxide by a neutralization sulfuric acid method. According to the method, the metatitanic acid is washed by water and then added with lime for neutralization, so that the emission of waste acid in the production process of the titanium dioxide can be reduced, the waste acid is comprehensively utilized, and the sulfate, the urea and the ammonium dihydrogen phosphate are added for reaction and the dispersing agent is added, so that the specific surface area of the titanium dioxide is increased, and the dispersibility of the product is improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method for producing titanium dioxide by a neutralization sulfuric acid method comprises the following steps:
(1) washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 6.5-7.5, performing filter pressing by a filter press, and adding water to adjust the pH value to be metatitanic acid slurry with the titanium dioxide concentration of 150-250 g/L;
(2) adding sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to 60-80 deg.C, stirring, standing for 2-4 hr, and neutralizing with ammonia water to pH of 6.5-7.5 to obtain hydrolyzed slurry; the addition amounts of the sulfate, the urea and the ammonium dihydrogen phosphate are respectively 1-3%, 0.5-1.5% and 0.5-1.5% based on the titanium dioxide in the metatitanic acid slurry;
(3) adding a dispersing agent into the nano titanium dioxide slurry, carrying out filter pressing by a filter press, carrying out flash evaporation drying on a pressed filter cake, and crushing by using a steam flow crusher to obtain titanium dioxide; the dispersing agent consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol.
Further, the dispersant is added in an amount of 0.5-1.5% by weight based on the weight of titanium dioxide in the slurry.
Furthermore, the mass ratio of the cocamidopropyl betaine, the polyglycerol fatty acid ester and the polyethylene glycol in the dispersing agent is 1-3:1-3: 3-5.
Further, the filter pressing in the step (1) and the step (3) is carried out until the solid content is 50-60%.
Further, the flash drying temperature is controlled at 350-500 ℃.
Further, the sulfate is one or more of sodium sulfate, potassium sulfate, aluminum potassium sulfate and aluminum sulfate.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the method adds lime for neutralization after washing metatitanic acid, not only can reduce the discharge of waste acid in the production process of titanium dioxide, but also comprehensively utilizes the waste acid, and the specific surface area of the prepared titanium dioxide is 360-380cm2The water dispersibility is more than 98 percent, calcium is introduced, and the prepared titanium dioxide has wide application prospect in the field of wastewater treatment.
2. According to the method, sulfate, urea and ammonium dihydrogen phosphate are added into metatitanic acid slurry, so that the particle size distribution of the titanium dioxide product is narrow, and the specific surface area is increased.
3. The method of the invention adds the dispersing agent consisting of the cocamidopropyl betaine, the polyglycerol fatty acid ester and the polyethylene glycol, can obviously improve the dispersibility of the titanium dioxide, and solves the problem of low catalytic efficiency caused by easy agglomeration of the existing titanium dioxide.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Example 1
A method for producing titanium dioxide by a neutralization sulfuric acid method comprises the following steps:
(1) washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 7.0, performing filter pressing by a filter press, and adding water to adjust the mixture to metatitanic acid slurry with the titanium dioxide concentration of 200 g/L;
(2) adding sodium sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to 60-80 deg.C, stirring, standing for 3 hr, and neutralizing with ammonia water to pH 7.0 to obtain hydrolyzed slurry; the addition amounts of the sodium sulfate, the urea and the ammonium dihydrogen phosphate are respectively 1.5%, 1% and 1.2% based on titanium dioxide in the metatitanic acid slurry;
(3) 1.2 percent of dispersant is added into the nano titanium dioxide slurry by the weight of titanium dioxide in the slurry, and the dispersant consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol in a mass ratio of 2:3: 5. Filter-pressing the mixture by a filter press until the solid content is 55 percent, flash-evaporating and drying the pressed filter cake at the temperature of 450 ℃, and crushing the filter cake by a steam flow crusher to obtain the titanium dioxide.
Example 2
A method for producing titanium dioxide by a neutralization sulfuric acid method comprises the following steps:
(1) washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 7.5, performing filter pressing by a filter press, and adding water to adjust the mixture to metatitanic acid slurry with titanium dioxide concentration of 150 g/L;
(2) adding aluminum potassium sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to 70 ℃, uniformly stirring, standing for 4 hours, and neutralizing with ammonia water until the pH value is 7.5 to obtain hydrolysis slurry; the adding amounts of the aluminum potassium sulfate, the urea and the ammonium dihydrogen phosphate are respectively 2.5%, 0.8% and 1% based on the titanium dioxide in the metatitanic acid slurry;
(3) 0.8 percent of dispersant is added into the nano titanium dioxide slurry by the weight of titanium dioxide in the slurry, and the dispersant consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol in a mass ratio of 1:2: 3. Filter-pressing the mixture by a filter press until the solid content is 60 percent, flash-evaporating and drying the pressed filter cake at the temperature of 500 ℃, and crushing the filter cake by a steam flow crusher to obtain the titanium dioxide.
Example 3
A method for producing titanium dioxide by a neutralization sulfuric acid method comprises the following steps:
(1) washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 7.0, performing filter pressing by a filter press, and adding water to adjust the mixture to metatitanic acid slurry with the titanium dioxide concentration of 250 g/L;
(2) adding potassium sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to 60 ℃, uniformly stirring, standing for 2.5h, and neutralizing with ammonia water until the pH value is 6.5 to obtain hydrolysis slurry; the adding amount of the potassium sulfate, the urea and the ammonium dihydrogen phosphate is respectively 1.5 percent, 1.2 percent and 0.6 percent based on the titanium dioxide in the metatitanic acid slurry;
(3) 1% of dispersing agent is added into the nano titanium dioxide slurry based on the weight of titanium dioxide in the slurry, and the dispersing agent consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol in a mass ratio of 3:3: 4. Filter-pressing the mixture by a filter press until the solid content is 50 percent, flash-evaporating and drying the pressed filter cake at the temperature of 350 ℃, and crushing the filter cake by a steam flow crusher to obtain the titanium dioxide.
Example 4
A method for producing titanium dioxide by a neutralization sulfuric acid method comprises the following steps:
(1) washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 6.5, performing filter pressing by a filter press, and adding water to adjust the mixture to metatitanic acid slurry with the titanium dioxide concentration of 200 g/L;
(2) adding potassium sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to 70 ℃, uniformly stirring, standing for 4h, and neutralizing with ammonia water until the pH value is 7.0 to obtain hydrolysis slurry; the adding amount of the potassium sulfate, the urea and the ammonium dihydrogen phosphate is respectively 2 percent, 0.8 percent and 1.0 percent based on the titanium dioxide in the metatitanic acid slurry;
(3) 1.5 percent of dispersant is added into the nano titanium dioxide slurry by the weight of titanium dioxide in the slurry, and the dispersant consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol in a mass ratio of 3:3: 4. Filter-pressing the mixture by a filter press until the solid content is 50 percent, flash-evaporating and drying the pressed filter cake at the temperature of 500 ℃, and crushing the filter cake by a steam flow crusher to obtain the titanium dioxide.
The titanium dioxide prepared in examples 1 to 4 was subjected to conventional methods for detecting specific surface area and particle size distribution (D)50、D90) And dispersibility, the test results are shown in table 1.
Table 1: performance detection result of titanium dioxide prepared by the invention
The titanium dioxide prepared by the method has the advantages of large specific surface area, good dispersibility, small particle size distribution and the like, and has wide application prospect in wastewater treatment.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (6)
1. A method for producing titanium dioxide by a neutralization sulfuric acid method is characterized by comprising the following steps: the method comprises the following steps:
washing metatitanic acid prepared by a sulfuric acid method with water, adding lime for neutralization, controlling the pH value to be 6.5-7.5, performing filter pressing by a filter press, and adding water to adjust the pH value to be metatitanic acid slurry with the titanium dioxide concentration of 150-250 g/L;
adding sulfate, urea and ammonium dihydrogen phosphate into metatitanic acid slurry, heating to 60-80 deg.C, stirring, standing for 2-4 hr, and neutralizing with ammonia water to pH of 6.5-7.5 to obtain hydrolyzed slurry; the addition amounts of the sulfate, the urea and the ammonium dihydrogen phosphate are respectively 1-3%, 0.5-1.5% and 0.5-1.5% based on the titanium dioxide in the metatitanic acid slurry;
(3) adding a dispersing agent into the nano titanium dioxide slurry, carrying out filter pressing by a filter press, carrying out flash evaporation drying on a pressed filter cake, and crushing by using a steam flow crusher to obtain titanium dioxide; the dispersing agent consists of cocamidopropyl betaine, polyglycerol fatty acid ester and polyethylene glycol.
2. The method for producing titanium dioxide by the neutralization sulfuric acid process according to claim 1, which is characterized in that: the dispersant is added in an amount of 0.5-1.5% by weight of the titanium dioxide in the slurry.
3. The method of nano titanium dioxide according to claim 2, characterized in that: the mass ratio of the cocamidopropyl betaine, the polyglycerol fatty acid ester and the polyethylene glycol in the dispersing agent is 1-3:1-3: 3-5.
4. The method of nano titanium dioxide according to claim 1, characterized in that: and (3) performing pressure filtration in the step (1) and the step (3) until the solid content is 50-60%.
5. The method of nano titanium dioxide according to claim 1, characterized in that: the flash drying temperature is controlled at 350-500 ℃.
6. The method of nano titanium dioxide according to claim 1, characterized in that: the sulfate is one or a combination of sodium sulfate, potassium sulfate, aluminum potassium sulfate and aluminum sulfate.
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| CN202010361987.5A CN111573723A (en) | 2020-04-30 | 2020-04-30 | Method for producing titanium dioxide by using neutralization sulfuric acid method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010361987.5A CN111573723A (en) | 2020-04-30 | 2020-04-30 | Method for producing titanium dioxide by using neutralization sulfuric acid method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029187A (en) * | 2006-03-03 | 2007-09-05 | 攀钢集团攀枝花钢铁研究院 | High-dispersed titanium pigment and its production |
| CN101318698A (en) * | 2008-07-11 | 2008-12-10 | 四川华铁钒钛科技股份有限公司 | Method for preparing anatase type nano-titanium dioxide |
| CN104477984A (en) * | 2014-11-21 | 2015-04-01 | 广西美之峰科技有限责任公司 | Preparation method of nano titanium dioxide serving as flue gas denitrification catalyst |
| WO2017020547A1 (en) * | 2015-07-31 | 2017-02-09 | 上海安赐环保科技股份有限公司 | Highly effective sulfuric acid-process titanium dioxide water washing system and water washing process |
| CN106830063A (en) * | 2017-01-10 | 2017-06-13 | 四川龙蟒钛业股份有限公司 | The method that phosphoric acid by wet process is used for sulfuric acid method titanium pigment salt treatment |
| CN110510668A (en) * | 2018-10-31 | 2019-11-29 | 西安电子科技大学 | Adsorb the anatase titanium dioxide preparation method of heavy metal chromium |
-
2020
- 2020-04-30 CN CN202010361987.5A patent/CN111573723A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029187A (en) * | 2006-03-03 | 2007-09-05 | 攀钢集团攀枝花钢铁研究院 | High-dispersed titanium pigment and its production |
| CN101318698A (en) * | 2008-07-11 | 2008-12-10 | 四川华铁钒钛科技股份有限公司 | Method for preparing anatase type nano-titanium dioxide |
| CN104477984A (en) * | 2014-11-21 | 2015-04-01 | 广西美之峰科技有限责任公司 | Preparation method of nano titanium dioxide serving as flue gas denitrification catalyst |
| WO2017020547A1 (en) * | 2015-07-31 | 2017-02-09 | 上海安赐环保科技股份有限公司 | Highly effective sulfuric acid-process titanium dioxide water washing system and water washing process |
| CN106830063A (en) * | 2017-01-10 | 2017-06-13 | 四川龙蟒钛业股份有限公司 | The method that phosphoric acid by wet process is used for sulfuric acid method titanium pigment salt treatment |
| CN110510668A (en) * | 2018-10-31 | 2019-11-29 | 西安电子科技大学 | Adsorb the anatase titanium dioxide preparation method of heavy metal chromium |
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