Method for producing rutile type titanium white powder with high hiding power

A technology of rutile titanium dioxide and its production method, which is applied in the fields of chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc., can solve the problem of unreachable, high refractive index of silicon dioxide film, and failure to maximize the improvement of titanium dioxide. Hiding power and other issues, to achieve the effect of maintaining high whiteness and improving hiding power

Inactive Publication Date: 2010-11-17
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The inventor found in long-term experimental research and production practice that the introduction of appropriate silicon dioxide and aluminum oxide can indeed improve the hiding power of titanium dioxide, but the refractive index of the silicon dioxide film produced by the above-mentioned patent methods in an alkaline environment Higher without maximizing the hiding power

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The production method of the high hiding power rutile type titanium dioxide of the present embodiment comprises the following steps:

[0032] (1) Prepare the slurry containing the primary product of titanium dioxide: weigh 6000g of deionized water, add 12g of SiO 2 Sodium silicate solution, add 6000g uncoated rutile titanium dioxide under stirring to make a concentration of about 800gTiO 2 / L of titanium dioxide slurry, and then sanded with a laboratory sand mill to make the titanium dioxide reach the original particle size;

[0033] (2) Dilution: add deionized water to adjust the concentration of the slurry to 300gTiO 2 / L, transferred to the coating tank, heated the slurry to 35°C by steam indirect heating; then adjusted the pH value of the slurry to about 10.0;

[0034] (3) Add silicon-containing compound: add 100g SiO 2 / L sodium silicate solution 3000mL (according to SiO 2 with TiO 2 The mass percentage is about 5.0%); the slurry is heated to 70°C by indirect ...

Embodiment 2

[0039] The production method of the high hiding power rutile type titanium dioxide of the present embodiment comprises the following steps:

[0040] (1) Prepare the slurry containing the primary product of titanium dioxide: weigh 6000g of deionized water, add 12g of SiO 2 Sodium silicate solution, add 6000g uncoated rutile titanium dioxide under stirring to make a concentration of about 800gTiO 2 / L of titanium dioxide slurry, and then sanded with a laboratory sand mill to make the titanium dioxide reach the original particle size;

[0041] (2) Dilution: add deionized water to adjust the concentration of the slurry to 300gTiO 2 / L, transferred to the coating tank, heated the slurry to 35°C by steam indirect heating; then adjusted the pH value of the slurry to about 10.0;

[0042] (3) Add silicon-containing compound: add 100g SiO 2 / L sodium silicate solution 2700mL (according to SiO 2 with TiO 2 The mass percentage is about 4.5%); the slurry is heated to 60°C by indirect ...

Embodiment 3

[0047] The production method of the high hiding power rutile type titanium dioxide of the present embodiment comprises the following steps:

[0048] (1) Prepare the slurry containing the primary product of titanium dioxide: weigh 8500g of deionized water, add 12g of SiO 2 Sodium silicate solution, add 6000g uncoated rutile titanium dioxide under stirring to make a concentration of about 600gTiO 2 / L of titanium dioxide slurry, and then sanded with a laboratory sand mill to make the titanium dioxide reach the original particle size;

[0049] (2) Dilution: add deionized water to adjust the concentration of the slurry to 200gTiO 2 / L, transfer to the coating tank, heat the slurry to 40°C by indirect steam heating; then adjust the pH value of the slurry to about 11.0;

[0050] (3) Add silicon-containing compound: add 100g SiO 2 / L sodium silicate solution 2400mL (according to SiO 2 with TiO 2 The mass percentage is about 4.0%); the slurry is heated to 80°C by indirect steam h...

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Abstract

The invention discloses a method for producing rutile type titanium white powder with high hiding power, which comprises the following steps of: preparing slurry containing a primary titanium dioxide product, diluting the slurry, adding a silicon-containing compound into the slurry, then adding the silicon-containing compound and an acid aluminum-containing compound into the mixture, and performing ageing, filtration, water washing, drying, crushing and the like. The adding order, adding mode, adding quantity and the like of each coating agent are controlled by fine processes, and process and parameter conditions of each operation step are strictly controlled at the same time so that the added coating agents are deposited on the surfaces of titanium white powder particles in forms of compact silicon dioxide coating layers, loose silicon dioxide coating layers and alumina coating layers; and the hiding power of a titanium white powder product is improved and the characteristics such as high whiteness and the like and basic weather resistance of the titanium white powder product are kept by combining the processes of ageing, filtration, water washing, drying, crushing and the like.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a production method of high-hiding rutile titanium dioxide. Background technique [0002] Titanium dioxide pigment is the best white pigment. It has the advantages of high whiteness, high opacity, stable physical and chemical properties, etc. It is widely used in coatings, plastics, papermaking and other industries. [0003] In the field of coating applications, the hiding power of titanium dioxide is related to the difference between the refractive index of the pigment and the resin, the greater the difference, the higher the hiding power. Since hydrated silica has the lowest refractive index, the introduction of hydrated silica during the surface treatment of titanium dioxide can increase the refractive index difference, and coating a large amount of hydrated silica can also maximize the individual titanium dioxide The particles are isolated from each other...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/04C09D133/02
Inventor 刘不尽高华刘洪金邓伯松王洪福
Owner SICHUAN LOMON TITANIUM IND CO LTD
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