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Hydrolysis method for preparing rutile titanium dioxide

A technology for preparing rutile titanium dioxide and gold, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complex operation and long process flow, and achieve the effect of simple and convenient process operation, good pigment performance and cost saving

Inactive Publication Date: 2012-06-20
PANGANG GROUP RESEARCH INSTITUTE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrolysis process has the disadvantages of long process flow and complex operation.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0016] The hydrolysis method for preparing rutile type titanium dioxide according to the present invention comprises the following steps:

[0017] A. Under the condition of sufficient stirring, the seed crystal is added into the titanium liquid to form a hydrolysis system, and the ratio of the seed crystal to the titanium liquid is according to the titanium dioxide (TiO2) in the seed crystal 2 O) quality and titanium dioxide (Ti) in titanium solution 2 The mass ratio of O) is calculated within the range of 1.0% to 5.0%. B. Heat the hydrolysis system to the first boiling point, and stop heating and stirring after the color of the hydrolysis system turns gray to mature the particles formed in the hydrolysis system. Here, the time for stopping heating and stopping stirring after the color of the hydrolysis system turns gray may be referred to as aging time, and the aging time in the present invention may be 10 minutes to 50 minutes. Preferably, the aging time can be selected wi...

example 1

[0025] Add 1000ml of titanium liquid into the hydrolysis pot, the concentration of titanium dioxide in the titanium liquid is 225g / L, and preheat the titanium liquid to 94°C. After preheating the seed crystal to 50°C, add it into the hydrolysis pot under the condition of sufficient stirring, the amount of the seed crystal added (TiO2 in the seed crystal 2 Mass and TiO in titanium solution 2 mass ratio) was 1.5%. The concentration of titanium dioxide in the obtained hydrolysis system was 180 g / L. Heat the hydrolysis system to raise the temperature to the first boiling point. After the hydrolysis system turns gray, stop stirring and stop heating for 50 minutes. After starting the stirring, add pure water within 90 minutes to adjust the TiO in the hydrolysis system. 2 The content is 175g / L, while maintaining a slight boiling state for 4h, the hydrolysis ends. The hydrolyzed metatitanic acid obtained after subsequent treatment has a decolorizing strength (TCS) of 1810 and a bri...

example 2

[0027] Add 1000ml of titanium liquid into the hydrolysis pot, the concentration of titanium dioxide in the titanium liquid is 225g / L, and preheat the titanium liquid to 96°C. After preheating the seed crystal to 90°C, add it into the hydrolysis pot under the condition of sufficient stirring, the amount of the seed crystal added (TiO2 in the seed crystal 2 Mass and TiO in titanium solution 2 mass ratio) was 5.0%. The concentration of titanium dioxide in the obtained hydrolysis system was 190 g / L. Heat the hydrolysis system to raise the temperature to the first boiling point. After the hydrolysis system turns gray, stop stirring and stop heating for 10 minutes. After starting the stirring, add pure water within 120 minutes to adjust the TiO in the hydrolysis system. 2 The content is 185g / L, while maintaining a slight boiling state for 4h, the hydrolysis ends. The hydrolyzed metatitanic acid obtained after subsequent treatment has a decolorizing strength (TCS) of 1805 and a br...

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Abstract

The invention provides a hydrolysis method for preparing rutile titanium dioxide. The hydrolysis method comprises the following steps of: adding a crystal seed into titanium liquid under full stirring to form a hydrolysis system, wherein the ratio of the crystal seed to the titanium liquid is 1.0 to 5.0 percent according to the mass ratio of titanium dioxide in the crystal seed to titanium dioxide in the titanium liquid; heating the hydrolysis system to a first boiling point, and stopping heating and stirring after the color of the hydrolysis system is grayed to ensure that particles formed in the hydrolysis system are cured; and starting stirring, and continuously heating the hydrolysis system to ensure that the hydrolysis system is slightly boiled until hydrolysis is finished. The hydrolysis method has the advantages that: the process is easy and convenient to operate, cost is saved, and the like; and the rutile titanium dioxide with stable quality and high pigment performance can be prepared after metatitanic acid obtained through hydrolysis is subjected to subsequent treatment.

Description

technical field [0001] The invention relates to the preparation technology of rutile titanium dioxide, more specifically, relates to a hydrolysis method capable of preparing rutile titanium dioxide with better pigment performance and stable quality. Background technique [0002] At present, most domestic titanium dioxide manufacturers use the sulfuric acid titanium dioxide process, and for the sulfuric acid titanium dioxide process, the titanium solution (usually, the main component of the titanium solution is: TiOSO 4 or Ti(SO 4 ) 2 、H 2 SO 4 , FeSO 4 ) hydrolysis process is one of the key factors affecting the quality of titanium dioxide products. At present, the hydrolysis in industrial application mainly includes self-generated seed crystal hydrolysis at atmospheric pressure and external seed crystal hydrolysis at atmospheric pressure. Compared with self-generated seed crystal hydrolysis at atmospheric pressure, external seed crystal hydrolysis at atmospheric press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/053
Inventor 路瑞芳马维平胡鸿飞杜剑桥
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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