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Producing method for granular titanium dioxide

A technology of titanium dioxide and production method, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of uneven size, high production cost, brittle particles, etc., to save steam and water, complete hydrolysis, strength and purity high effect

Inactive Publication Date: 2004-11-03
镇江泛宇钛白粉厂
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AI Technical Summary

Problems solved by technology

The particles of titanium dioxide produced by the current process are fragile, the particle distribution is not concentrated, and the size is uneven. A large amount of sulfuric acid, steam and water are needed in the production, and the production cost is high.

Method used

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Embodiment

[0007] Use ferro-titanium ore, sulfuric acid and water as raw materials, mix and stir in an acid decomposition pot to fully dissolve the ferro-titanium ore and then heat. The heating temperature is controlled at 200-220°C to cause the mixture to undergo a polymerization reaction. After the reaction The concentration is controlled at about 87%, and water is added to dissolve, so that the titanium component is converted into a soluble sulfate solution, and high-priced iron filings are added to the sulfate solution for reduction treatment; the product after reduction treatment is added to titanium solution under normal pressure as Active agent, the titanium content in this active agent should account for 70-78% of the total amount of titanium liquid, so that the weight of the active agent in titanium liquid accounts for 0.5-4% of the total weight of the solution after reduction treatment; It is hydrolyzed in a reactor combined with indirect vapor phase, and the titanium dioxide hy...

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PUM

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Abstract

The titania producing sulfuric acid process includes the successive steps of: heating the mixture of ilmenite, sulfuric acid and water for dissolving ilmenite fully; adding high valent iron for reducing; adding titanium liquid with titanium content of 70-78 % and in the amount of 0.5-4 % of total solution amount as activating agent to hydrolyze; filtering out titania hydrate; and calcining the titania hydrate. The present invention has saving in water vapor and water, complete hydrolysis, controlled titania granularity, high grain strength and high purity.

Description

Technical field [0001] The present invention relates to a process for the production of titanium dioxide by the sulfuric acid process. Background technique [0002] At present, the sulfuric acid process is used to produce titanium dioxide. The method is to dissolve the titanium raw material with sulfuric acid and heat it to prepare a solution containing soluble sulfate. Add high-valent iron to the solution for reduction treatment, and then put it in the reactor and use direct steam hydrolysis to generate Hydrated titanium dioxide, the titanium dioxide hydrate is separated by filtration, and then the titanium dioxide hydrate is calcined into granular titanium dioxide. The particles of titanium dioxide produced by the current technology are fragile, the particle distribution is not concentrated, and the size is uneven. A large amount of sulfuric acid, steam and water are needed in the production, and the production cost is high. Contents of the invention [0003] In order t...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G23/053
Inventor 徐金山李建明张新民张庆保龚冬富徐宏贵
Owner 镇江泛宇钛白粉厂
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