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Preparation method of titanium dioxide made with compound coating chlorination process

A titanium dioxide and chlorination technology, applied in the field of chemical materials, can solve problems such as the performance not reaching the best effect, and achieve the effect of improving lipophilicity or hydrophilicity, improving anti-pulverization performance, and excellent comprehensive performance.

Inactive Publication Date: 2016-10-12
YIBIN TIANYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when titanium dioxide is exposed to complex environments for a long time, its performance does not achieve the best effect when using inorganic, organic, one-component or two-component composites alone.

Method used

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  • Preparation method of titanium dioxide made with compound coating chlorination process
  • Preparation method of titanium dioxide made with compound coating chlorination process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1), take a certain amount of titanium dioxide powder, add water to make a suspension with a concentration of 10wt%, add 0.02% sodium hexametaphosphate of the quality of the titanium dioxide powder, adjust the pH to 11 with sodium hydroxide, and then stir for 2h, Obtain titanium dioxide slurry;

[0029] (2), add hydrochloric acid to the titanium dioxide slurry obtained in step (1) to adjust the pH to 9, raise the temperature to 60°C, then slowly add zirconium sulfate, the addition of zirconium sulfate accounts for 0.5% of the mass of the titanium dioxide powder, and then ripen for 30min , adjust the pH to 7 with hydrochloric acid again, and then ripen for 50 minutes;

[0030](3), in the mixed powder slurry obtained in step (2), heat up to 70° C., add sodium silicate (calculated as SiO ) as 0.5% of the mass of titanium dioxide powder to obtain a mixed slurry, and adjust the pH value with hydrochloric acid 7.5, let the slurry stand for 30 minutes to make silicon precipit...

Embodiment 2

[0036] (1), take a certain amount of particle size at 0.2-0.3um titanium dioxide powder, add water to make a suspension with a concentration of 20wt%, add 0.2% sodium hexametaphosphate of the titanium dioxide powder quality, adjust the pH to 10, and then stirred for 3h to obtain a titanium dioxide slurry;

[0037] (2), in the titanium dioxide slurry obtained in step (1), heat up to 80°C, add hydrochloric acid to adjust the pH to 8, then slowly add zirconium oxychloride, the amount of zirconium oxychloride accounts for 1 / 2 of the mass of titanium dioxide powder 1%, then ripen for 60 minutes, adjust the pH to 8 with hydrochloric acid again, and then ripen for 60 minutes;

[0038] (3), lower the temperature of the mixed slurry obtained in the above step (2) to 70°C, add sodium metasilicate (using SiO 2 Calculate) is 3% of the titanium dioxide powder mass, adjust the pH value to 8.2 with hydrochloric acid, let the slurry stand for 60 minutes, make silicon precipitate on the surfa...

Embodiment 3

[0044] (1), take a certain amount of titanium dioxide powder with a particle size of 0.2-0.3um, add water to form a suspension with a concentration of 30wt%, add 0.3% sodium hexametaphosphate of the titanium dioxide powder quality, and adjust the pH to 9. Stir for another 2 hours to obtain a titanium dioxide slurry;

[0045] (2), in the titanium dioxide slurry obtained in step (1), heat up to 85°C, add hydrochloric acid to adjust the pH to 9, then slowly add zirconium chloride, the addition of zirconium chloride accounts for 2% of the mass of titanium dioxide powder , then ripen for 30-100 minutes, adjust the pH to 9 with hydrochloric acid again, and then ripen for 90 minutes;

[0046] (3), in the mixed slurry obtained in the above step (2), the temperature is lowered to 70°C, the addition amount of sodium silicate (based on SiO 2 Calculated) is 2% of the mass of the titanium dioxide powder, the pH value is adjusted to 8.6 with hydrochloric acid, and the slurry is allowed to ...

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Abstract

The invention discloses a preparation method of titanium dioxide made with a compound coating chlorination process. Firstly, zirconium salt, silicon salt and aluminium salt are adopted for inorganic coating of titanium dioxide, and then an organic coating agent is used for coating. According to the method, an inorganic and organic novel compound coating technology is utilized, titanium dioxide is greatly improved in hydrophilicity, chalking resistance, lightening power, and color retention, and meanwhile the wettability, dispersity and covering power of titanium dioxide in a dispersion medium are improved. Compared with individual organic and inorganic coating agents, the titanium dioxide has better comprehensive performance.

Description

technical field [0001] The invention relates to a preparation method of coated titanium dioxide, in particular to a preparation method of composite coated titanium dioxide by chlorination method, and belongs to the technical field of chemical materials. Background technique [0002] The scientific name of titanium dioxide is titanium dioxide, which is considered to be a white pigment with the best performance in the world. It has high hiding power, weather resistance, and decolorization power. Fine chemical industries such as rubber, ceramics, cosmetics, food and medicine. At present, there are two main methods for producing titanium dioxide: sulfuric acid method and chlorination method. The sulfuric acid method is to produce titanous sulfate by acidolysis reaction of ferrotitanium powder and concentrated sulfuric acid, which is hydrolyzed to generate metatitanic acid, and then calcined and crushed to obtain titanium dioxide products. The advantage of this process is that ...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/08
CPCC09C1/3692C09C3/006
Inventor 陈洪万立缑可贞王政强
Owner YIBIN TIANYUAN GRP CO LTD
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