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Method for treating salt during production of titanium dioxide

A titanium dioxide and salt treatment technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of titanium dioxide achromatic power and the electrical resistivity is not greatly improved, and achieves the improvement of achromatic power and quality. Effect

Active Publication Date: 2017-08-11
PANZHIHUA TAIDU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this salt treatment agent can improve the whiteness, it does not greatly improve the decolorization power and resistivity of titanium dioxide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Adopt the following method to prepare the titanium dioxide primary product:

[0032] a, pulping: add water and stir metatitanic acid (titanium dioxide content is 45% in this metatitanic acid), make metatitanic acid slurry;

[0033] b. Add treatment agent: add potassium carbonate, sodium phosphate, stannous sulfate and aluminum chloride to the metatitanic acid slurry;

[0034] c. Filtration and calcination: filter the slurry after adding the treatment agent in step b, take the filter cake, and calcine to obtain the primary product of titanium dioxide;

[0035] Wherein, the addition of potassium carbonate is based on potassium oxide, and the quality of potassium oxide is 0.64% of the mass of titanium dioxide; the addition of sodium phosphate is based on phosphorus pentoxide, and the quality of phosphorus pentoxide is 0.28% of the quality of titanium dioxide; The added amount of tin is calculated as tin oxide, and the mass of tin oxide is 0.13% of the mass of titanium dio...

Embodiment 2

[0038] Adopt the following method to prepare the titanium dioxide primary product:

[0039] a, pulping: add water and stir metatitanic acid (titanium dioxide content is 45% in this metatitanic acid), make metatitanic acid slurry;

[0040] b. Add treatment agent: add potassium hydroxide, sodium hydrogen phosphate, tin nitrate and aluminum sulfate to the metatitanic acid slurry;

[0041] c. Filtration and calcination: filter the slurry after adding the treatment agent in step b, take the filter cake, and calcine to obtain the primary product of titanium dioxide;

[0042] Wherein, the addition of potassium hydroxide is calculated in terms of potassium oxide, and the quality of potassium oxide is 1.35% of the mass of titanium dioxide; the addition of sodium hydrogen phosphate is calculated in terms of phosphorus pentoxide, and the quality of phosphorus pentoxide is 0.38% of the quality of titanium dioxide; The added amount of tin nitrate is calculated by tin oxide, and the mass o...

Embodiment 3

[0045] Adopt the following method to prepare the titanium dioxide primary product:

[0046] a, pulping: add water and stir metatitanic acid (titanium dioxide content is 45% in this metatitanic acid), make metatitanic acid slurry;

[0047] b. Add treatment agent: add potassium bicarbonate, sodium hexametaphosphate, stannous sulfate and aluminum nitrate to the metatitanic acid slurry;

[0048] c. Filtration and calcination: filter the slurry after adding the treatment agent in step b, take the filter cake, and calcine to obtain the primary product of titanium dioxide;

[0049] Wherein, the addition of potassium bicarbonate is based on potassium oxide, and the quality of potassium oxide is 0.76% of the mass of titanium dioxide; the addition of sodium hexametaphosphate is based on phosphorus pentoxide, and the quality of phosphorus pentoxide is 0.33% of the quality of titanium dioxide %; the addition of stannous sulfate is based on tin oxide, and the quality of tin oxide is 0.21%...

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PUM

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Abstract

The invention relates to a method for treating salt during production of titanium dioxide, belongs to the technical field of titanium dioxide and solves the technical problems to provide the method for treating salt during production of titanium dioxide. By means of the method, the lightening power of titanium dioxide can be improved. The method comprises steps as follows: a, metatitanic acid is mixed with water and stirred for slurry production; b, specific amounts of potassium salt, phosphor salt, tin salt and aluminum salt are added to metatitanic acid slurry; c, a titanium dioxide primary product is obtained through filtration, filter cake taking and calcination. By means of the method, the lightening power of titanium dioxide obtained through treatment can be improved, and the quality of titanium dioxide is improved.

Description

technical field [0001] The invention relates to a salt treatment method during titanium dioxide production, and belongs to the technical field of titanium dioxide production. Background technique [0002] Titanium dioxide (titanium dioxide) is chemically stable and does not react with most substances under normal circumstances. There are three crystallizations of titanium dioxide in nature: brookite, anatase and rutile. The plate titanium type is an unstable crystal type, which has no industrial application value. Both the anatase type and the rutile type have stable crystal lattices and are important white pigments and porcelain glazes. Compared with other white pigments It has superior whiteness, tinting strength, hiding power, weather resistance, heat resistance, and chemical stability, especially non-toxic. Therefore, titanium dioxide is widely used in coatings, plastics, rubber, ink, paper, chemical fiber, ceramics, daily chemicals, medicine, food and other industries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01G23/08
CPCC01G23/053C01G23/08
Inventor 周彤周军米加海李关祥
Owner PANZHIHUA TAIDU CHEM
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