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Method for preparing high-purity titanium pigment by using high-purity water

A technology of high-purity water and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems that the harmful impurity elements of titanium dioxide cannot be effectively controlled, and the pollution of the environment by the tail gas of the calcination kiln, so as to improve the recovery rate and reduce the loss of dust , the effect of reducing pollution

Inactive Publication Date: 2011-02-16
XICHANG NEW VANADIUM & TITANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the above-mentioned technical scheme for preparing titanium dioxide, the main problem is that the harmful impurity elements in titanium dioxide cannot be effectively controlled, and the exhaust gas of the calcining kiln pollutes the environment

Method used

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  • Method for preparing high-purity titanium pigment by using high-purity water
  • Method for preparing high-purity titanium pigment by using high-purity water
  • Method for preparing high-purity titanium pigment by using high-purity water

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] refer to figure 1 , the fine titanium solution (physical and chemical index is: TiO 2 172g / l, F value 2.1, clarity qualified) and high-purity water in a volume ratio of 1:0.3, measure high-purity water and heat it to 100°C, mix and react with refined titanium liquid, and keep it at 92-96°C for 4 hours to form Material diaphragm filter press, pure water washing for 6 hours, to obtain high-purity metatitanic acid, metatitanic acid is added to the calcining kiln through the feeding device and calcined, and the product components obtained are as follows:

[0028] Chemical composition of high-purity titanium dioxide products Unit: %

[0029] Composition

example 2

[0031] As shown in the accompanying drawing, the fine titanium solution (physical and chemical index is: TiO 2 178g / l, F value 2.0, qualified clarity) and high-purity water in a volume ratio of 1:0.31, measure high-purity water and heat it to 100°C, mix and react with refined titanium liquid, and keep it at 93-96°C for 5 hours to form The material diaphragm filter press is pressed and washed with pure water for 5 hours to obtain high-purity metatitanic acid. The product composition obtained after metatitanic acid is added to the calcining kiln through the feeding device is as follows:

[0032] Chemical composition of high-purity titanium dioxide products Unit: %

[0033] Composition

example 3

[0035] As shown in the accompanying drawing, the fine titanium solution (physical and chemical index is: TiO 2 183g / l, F value 2.0, and qualified clarity) and high-purity water at a volume ratio of 1:0.33, measure high-purity water and heat it to 100°C, mix and react with refined titanium liquid, and keep it at 95-96°C for 5 hours to form Material diaphragm filter press, pure water washing for 6 hours, to obtain high-purity metatitanic acid, metatitanic acid is added to the calcining kiln through the feeding device and calcined, and the product components obtained are as follows:

[0036] Chemical composition of high-purity titanium dioxide products Unit: %

[0037] Composition

[0038] A method for preparing high-purity titanium dioxide by utilizing high-purity water of the present invention, the high-purity water used is obtained by processing raw water (tap water or underground water) through mechanical filtration, membrane filtration and mixed ...

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Abstract

The invention discloses a method for preparing high-purity titanium pigment by using high-purity water and relates to a preparation method of titanium pigment, in particular to a preparation method of high-purity titanium pigment, which comprises the following steps: (1) selecting high-purity water and a refined titanium liquid as raw materials; (2) carrying out hydrolysis of the refined titanium liquid: taking the high-purity water, controlling the high-purity water to boil at 100 DEG C, adding the refined titanium liquid according to a refined titanium liquid / high-purity water volume ratio of 1:0.3-0.35, and maintaining the temperature for 4-5 hours to obtain metatitanic acid; (3) carrying out water washing on the metatitanic acid: pumping the metatitanic acid into a membrane filter press, washing the metatitanic acid with the high-purity water for 4-6 hours; and (4) calcining the metatitanic acid subject to water washing to obtain the high-purity titanium pigment. By using the method, harmful impurities / elements in the titanium pigment prepared by the sulfuric acid method can be effectively controlled, and the tail gas from a calcining kiln can be effectively treated.

Description

technical field [0001] The invention relates to a preparation method of titanium dioxide, in particular to a preparation method of high-purity titanium dioxide. Background technique [0002] When sulfuric acid method is used to produce titanium dioxide, hydrolysis of refined titanium solution and washing with metatitanic acid are important processes. First, through hydrolysis of the titanium solution, metatitanic acid is precipitated from the solution, and then washed with water (purification of metatitanic acid). The quality of water directly affects the effect of hydrolysis and water washing and the quality level of the final titanium dioxide. [0003] At present, there are five methods for preparing high-purity titanium dioxide, the main contents of which are as follows: [0004] The Institute of Chemistry, Chinese Academy of Sciences has invented a preparation method for rutile titanium dioxide powder, which is carried out according to the following steps (percentage b...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 李安余乘波赵世昌
Owner XICHANG NEW VANADIUM & TITANIUM