New technology for preparing pearlescent pigment

A pearlescent pigment and process technology, applied in inorganic pigment processing, fibrous fillers, chemical instruments and methods, etc., can solve the problems of volatile, high price of titanium tetrachloride, harsh environment, etc.

Inactive Publication Date: 2016-06-01
江淑芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high purity of titanium tetrachloride in this method, the whiteness and gloss of the product are obviously improved, but because the aqueous solution contains a...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) Prepare 25% titanium sulfate, titanyl sulfate aqueous solution

[0012] According to the material-acid ratio of titanium dioxide, TiOI[2]:HI[2]SOI[4]=1:2, add titanium dioxide to the acid hydrolysis tank, add concentrated sulfuric acid, add water to adjust the concentration of sulfuric acid to 90%, stir and heat . After the reactants are dissolved and become solid, let stand and cool for 2 hours, then add water to dilute to 25% under air stirring for later use;

[0013] (2) Hydrolysis coating [0013] 75 grams of mica powder with a particle size range of 10-60 microns are suspended in 400 milliliters of deionized water, stirred evenly, and slowly heated to 75 degrees Celsius, and the pH is adjusted to 2.2 with 20% hydrochloric acid . Then within 4 hours, 110 grams of 25% titanium solution prepared in step 1 was metered in, and at the same time, 25% sodium hydroxide solution was metered in to maintain the pH value of the suspension. After the addition is complete, t...

Embodiment 2

[0015] (1) Prepare 25% titanium sulfate, titanyl sulfate aqueous solution

[0016] Add the hydrated titanium dioxide dried at 100-200°C to the acid hydrolysis tank according to the material-acid ratio, TiO丨[2]:H丨[2]SO丨[4]=1:2, and then add the dried hydrated titanium dioxide to the acid hydrolysis tank Concentrated sulfuric acid, add water to adjust the concentration of sulfuric acid to 90%, stir and heat. After the reactant dissolves to a solid state, let it cool for 2 hours and then add water to dilute to 25% under air stirring

[0017] (2) Hydrolysis coating

[0018] Suspend 75 grams of mica powder with a particle size range of 10-60 microns in 400 milliliters of deionized water, stir evenly, and slowly heat to 75 degrees Celsius, and adjust the pH to 2.2 with 20% hydrochloric acid. Then within 4 hours, 110 grams of 25% titanium solution prepared in step 1 was metered in, and at the same time, 25% sodium hydroxide solution was metered in to maintain the pH value of the su...

Embodiment 3

[0020] (1) Prepare 25% titanium sulfate, titanyl sulfate aqueous solution

[0021] Hydrate titanium dioxide containing 60% water according to the material-acid ratio, TiO丨[2]:H丨[2]SO丨[4]=1:2, add hydrated titanium dioxide containing 60% water into the acid hydrolysis tank, add concentrated sulfuric acid, and then Add water to adjust the concentration of sulfuric acid to 90%, stir and heat. After the reactants are dissolved and become solid, let stand and cool for 2 hours, then add water to dilute to 25% under air stirring for later use;

[0022] (2) Hydrolysis coating

[0023] Suspend 75 grams of mica powder with a particle size range of 10-60 microns in 400 milliliters of deionized water, stir evenly, and slowly heat to 75 degrees Celsius, and adjust the pH to 2.2 with 20% hydrochloric acid. Then within 4 hours, 110 grams of 25% titanium solution prepared in step 1 was metered in, and at the same time, 25% sodium hydroxide solution was metered in to maintain the pH value of...

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Abstract

The invention relates to a new technology for preparing pearlescent pigment. The new technology is characterized in that titanous sulfate and/or titanyl sulfate prepared by sulfuric acid acidolysis of titanium dioxide and/or hydrated titanium dioxide are/is used as raw materials to replace a titaniferous solution prepared from titanium tetrachloride or ilmenite powder, a hydrolysis precipitation (while adding alkaline matter such as caustic soda and ammonia water, and maintaining pH) method is applied to a lamellar base material, and thickness of titanium oxide coated on the base material and product color are controlled by adjusting technological conditions; and if necessary, other metal or nonmetal hydrous oxide can be additionally coated. The invention has advantages as follows: preparation cost of the titaniferous solution is lower than preparation cost of a titanium tetrachloride aqueous solution, and purity is similar; the technology is environmentally friendly; and purity of the titaniferous solution prepared by the technology is higher than purity of a titaniferous solution prepared from ilmenite. The technology of the invention can be applied to various models of pigments which require the usage of a titanium tetrachloride aqueous solution in production and contain the pearlescent pigment to replace a titanium tetrachloride aqueous solution.

Description

technical field [0001] The invention relates to a new process for preparing pearlescent pigments. Specifically, high-purity titanium sulfate and titanium oxysulfate prepared from sulfuric acid acid hydrolysis of titanium dioxide and / or hydrated titanium dioxide are used as raw materials to replace expensive and highly toxic titanium tetrachloride or non-toxic titanium tetrachloride. The pure titanium solution prepared from ilmenite powder is used for various types of pigments containing pearlescent pigments that require titanium tetrachloride aqueous solution in production, instead of titanium tetrachloride aqueous solution. Background technique [0002] Pearlescent pigments are based on natural / artificial mica powder or glass powder with low refractive index, flaky alumina, silicon oxide and other flake materials as the base layer, and the outer layer is coated with metal oxides with high refractive index. The most common It is titanium dioxide. Different pearlescent effec...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C1/00C09C3/06
Inventor 不公告发明人
Owner 江淑芬
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