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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  • Abstract
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  • Application Information

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Problems solved by technology

However, when titanium dioxide is exposed to complex environments for a long time, its performance does n

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
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Example Embodiment

[0027] Example 1:

[0028] (1). Weigh a certain amount of titanium dioxide powder, add water to make a suspension with a concentration of 10wt%, add 0.02% sodium hexametaphosphate based on the mass of the titanium dioxide powder, adjust the pH to 11 with sodium hydroxide, and 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, which accounts for 0.5% of the mass of the titanium dioxide powder, and then mature for 30 minutes , Adjust the pH to 7 again with hydrochloric acid, and then mature for 50 minutes;

[0030] (3) In the mixed powder slurry obtained in step (2), the temperature is raised to 70°C, sodium silicate (calculated as SiO2) is added to 0.5% of the mass of the titanium dioxide powder to obtain the mixed slurry, and the pH value is adjusted with hydrochloric acid 7.5, let the slurry stand for 30 minutes ...

Example Embodiment

[0035] Example 2:

[0036] (1) Weigh a certain amount of titanium dioxide powder with a particle size of 0.2-0.3um, add water to make a suspension with a concentration of 20% by weight, add 0.2% sodium hexametaphosphate by weight of the titanium dioxide powder, and adjust the pH to 10. Stir for another 3 hours to obtain titanium dioxide slurry;

[0037] (2) In the titanium dioxide slurry obtained in step (1), the temperature is raised to 80°C, hydrochloric acid is added to adjust the pH to 8, and then zirconium oxychloride is slowly added. The added amount of zirconium oxychloride accounts for the mass of the titanium dioxide powder 1%, then mature for 60 minutes, adjust the pH to 8 again with hydrochloric acid, and then mature for 60 minutes;

[0038] (3). The mixed slurry obtained in the above step (2) is cooled to 70°C, and sodium metasilicate (with SiO 2 (Calculated) is 3% of the mass of the titanium dioxide powder, adjust the pH to 8.2 with hydrochloric acid, and let the slurry...

Example Embodiment

[0043] Example 3:

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

[0045] (2) In the titanium dioxide slurry obtained in step (1), the temperature is raised to 85°C, hydrochloric acid is added to adjust the pH to 9, and then zirconium chloride is slowly added. The amount of zirconium chloride added accounts for 2% of the mass of the titanium dioxide powder , Then mature for 30-100min, adjust the pH to 9 with hydrochloric acid again, and mature for 90min;

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

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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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