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Method for preparing high-purity titanyl sulfate crystals

A high-purity technology of titanyl sulfate, applied in chemical instruments and methods, titanium and titanyl sulfate, titanium compounds, etc., can solve high energy consumption, affect the application effect of titanyl sulfate, quality and color of titanyl sulfate crystals and Purity differences and other issues to achieve the effect of reducing production costs

Inactive Publication Date: 2018-06-22
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-concentration sulfuric acid and high reaction temperature have high technical index requirements for the selection of preparation equipment materials, protective facilities, and parameter control, and there are technical problems of high energy consumption and high equipment maintenance costs; The titanyl sulfate solution has a great influence, and it is easy to breed by-products, so that the quality of the obtained titanyl sulfate crystals has considerable differences in color and purity, resulting in a decrease in the solubility of the titanyl sulfate product in water, which in turn affects the quality of the titanyl sulfate product. The application effect of titanium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Titanium concentrate is subjected to acidolysis and sedimentation according to the normal acidolysis process. After separating the unreacted acidolysis slag, keep the temperature of the titanium solution at 100 o C, add sulfuric acid 10:1 (mass ratio of sulfate group to titanium dioxide), and also add titanyl sulfate seed crystals at the same time, the amount of seed crystals added is 15wt% (mass ratio to titanium dioxide in the solution), to speed up crystallization, after the crystallization is complete , the needle-shaped titanyl sulfate crystals were separated by filtration while hot, and fully washed with dilute sulfuric acid with a concentration of 20%, the final yield of titanyl sulfate was 85%.

Embodiment 2

[0020] Titanium concentrate is subjected to acidolysis and sedimentation according to the normal acidolysis process. After separating the unreacted acidolysis slag, keep the temperature of the titanium solution at 150 o C, add sulfuric acid 6:1 (mass ratio of sulfate group to titanium dioxide), and also add titanyl sulfate seed crystals at the same time, the amount of seed crystals added is 10wt% (mass ratio to titanium dioxide in the solution), to accelerate crystallization, after crystallization is complete , the needle-shaped titanyl sulfate crystals were separated by filtration while hot, and fully washed with dilute sulfuric acid with a concentration of 10%, the final yield of titanyl sulfate was 90%.

Embodiment 3

[0022] Titanium concentrate is subjected to acidolysis and sedimentation according to the normal acidolysis process. After separating the unreacted acidolysis slag, keep the temperature of the titanium solution at 180 o C, add sulfuric acid 4:1 (mass ratio of sulfate group to titanium dioxide), and also add titanyl sulfate seed crystals at the same time, the amount of seed crystals added is 1wt% (mass ratio to titanium dioxide in the solution), to speed up crystallization, after the crystallization is complete , the needle-shaped titanyl sulfate crystals were separated by filtration while hot, and fully washed with dilute sulfuric acid with a concentration of 5%, and the final yield of titanyl sulfate was 85%.

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Abstract

The invention relates to a method for preparing high-purity titanyl sulfate crystals. The method includes the following steps that 1, ilmenite concentrate is subjected to acidolysis and sedimentationaccording to an acidolysis flow of a sulfuric acid method for preparing titanium dioxide, and after unreacted acidolysis dregs are separated, an acidolysis liquid is obtained; 2, the acidolysis liquidobtained in step 1 is maintained at 100-180 DDG C, sulfuric acid and titanyl sulfate seed crystals are added for crystallization, and after the crystallization is conducted completely, separation iscarried out when the temperature is still high to obtain acicular crystals; 3, the acicular crystals obtained in step 2 is scrubbed in dilute sulfuric acid to obtain the titanyl sulfate crystals. According to the method, the acidolysis liquid of the ilmenite concentrate is adopted as the raw material, a high-temperature crystallization mode is utilized to seed out the titanyl sulfate crystals, andthen thorough scrubbing is conducted to obtain the high-purity titanyl sulfate crystals.

Description

technical field [0001] The invention relates to a method for preparing high-purity titanyl sulfate crystals, belonging to the technical field of titanyl sulfate preparation. Background technique [0002] Titanyl sulfate can be widely used as a mordant for fiber fabrics, a reducing agent for dye fading, and a chromium-free passivation treatment instead of chromic acid in the electroplating industry, and it can also be used as a photocatalyst. The preparation of nano-scale titanium dioxide also largely relies on titanyl sulfate as the titanium source. Titanyl sulfate solution can be used to prepare ultra-fine titanium dioxide under certain conditions. High-purity titanyl sulfate can effectively reduce the agglomeration of nano-scale titanium dioxide particles. Improve dispersibility and improve its catalytic effect. [0003] At present, the preparation of titanyl sulfate is mainly obtained by dissolving metatitanic acid in sulfuric acid, such as an article titled "Solid TiOSO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
CPCC01G23/008C01P2004/10C01P2006/80
Inventor 张玉荣曹鹏周春勇孙润发姚恒平朱全芳
Owner SICHUAN LOMON TITANIUM IND CO LTD
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