A kind of method for preparing high-purity ammonium polyvanadate

A high-purity ammonium polyvanadate technology, which is applied in chemical instruments and methods, preparation of vanadium compounds, vanadium compounds, etc., can solve problems such as difficult to be effectively promoted, achieve automatic remote control, reduce labor intensity, improve The effect of purity

Active Publication Date: 2021-12-17
承德燕北冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain problems in each of them, and it is difficult to be effectively promoted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Add ferrous sulfate to the vanadium-containing solution to completely reduce the hexavalent chromium in the vanadium-containing solution to 1.05 times the theoretical amount, and react under stirring conditions to completely oxidize the hexavalent chromium in the solution to trivalent chromium ;

[0045] (2) adding excess polyaluminum sulfate to the solution obtained after the reaction in step (1), heating to 85° C. and stirring for reaction, so that the silicon in the solution is completely precipitated, and filtering after the reaction is completed to remove impurity silicon;

[0046] (3) Utilize aminophosphoric acid resin to carry out primary adsorption to the solution that step (2) solid-liquid separation obtains, after the adsorption is completed, desorb with sulfuric acid with a concentration of 20wt%, and reuse after regeneration;

[0047] (4) After the first adsorption described in step (3) is completed, utilize iminodiacetic acid chelating resin to carry ou...

Embodiment 2

[0051] (1) Add ferrous sulfate to the vanadium-containing solution to completely reduce the hexavalent chromium in the vanadium-containing solution to 1.1 times the theoretical amount, and react under stirring conditions so that the hexavalent chromium in the solution is completely oxidized to trivalent chromium ;

[0052] (2) adding excess polyaluminum sulfate to the solution obtained after the reaction in step (1), heating to 90° C. and stirring for reaction, so that the silicon in the solution is completely precipitated, and filtering after the reaction is completed to remove impurity silicon;

[0053] (3) Utilize aminophosphoric acid resin to carry out primary adsorption to the solution that step (2) solid-liquid separation obtains, after adsorption is completed, desorb with the sulfuric acid that concentration is 10wt%, reuse after regeneration;

[0054] (4) After the first adsorption described in step (3) is completed, utilize iminodiacetic acid chelating resin to carry ...

Embodiment 3

[0058] (1) Add ferrous sulfate to the vanadium-containing solution to completely reduce the hexavalent chromium in the vanadium-containing solution to 1.2 times the theoretical amount, and react under stirring conditions so that the hexavalent chromium in the solution is completely oxidized to trivalent chromium ;

[0059] (2) adding excess polyaluminum sulfate to the solution obtained after the reaction in step (1), heating to 90° C. and stirring for reaction, so that the silicon in the solution is completely precipitated, and filtering after the reaction is completed to remove impurity silicon;

[0060] (3) Utilize aminophosphoric acid resin to carry out primary adsorption to the solution that step (2) solid-liquid separation obtains, after the adsorption is completed, desorb with sulfuric acid with a concentration of 15wt%, and reuse after regeneration;

[0061] (4) After the first adsorption described in step (3) is completed, utilize iminodiacetic acid chelating resin to ...

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PUM

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Abstract

The invention relates to a method for preparing high-purity ammonium polyvanadate. The method comprises: adding ferrous sulfate to a vanadium-containing solution, stirring for reaction; adding a silicon precipitant after the reaction is completed, and separating solid and liquid after stirring; Use aminophosphoric acid resin to perform primary adsorption on the solution obtained from solid-liquid separation; after the primary adsorption is completed, use iminodiacetic acid chelating resin to perform secondary adsorption on the solution; add ammonium sulfate to the solution after secondary adsorption for vanadium precipitation, Ammonium polyvanadate product is obtained after solid-liquid separation. The present invention removes impurity elements such as chromium, iron, magnesium, aluminum and silicon in the vanadium-containing solution by improving the process and controlling the medicament, and prepares ammonium polyvanadate product with a purity >99.9%; the obtained high-purity Ammonium polyvanadate products can be used to prepare other high-purity vanadium products, which are applied to many fields such as metallurgy, aerospace, chemistry, batteries, pigments, glass, optics, medicine, etc., and have good application prospects.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for preparing high-purity ammonium polyvanadate. Background technique [0002] Vanadium has many excellent physical and chemical properties, so it is widely used. Known as "the monosodium glutamate of modern industry", it is an indispensable and important material for the development of modern industry, modern national defense and modern science and technology. With the rapid development of science and technology, human beings are increasingly demanding new materials, which cover many fields such as metallurgy, aerospace, chemistry, batteries, pigments, glass, optics, and medicine, and have good development prospects. [0003] 98% of the world's known vanadium reserves are produced in vanadium-titanium magnetite. In the process of recovering iron and vanadium using vanadium-titanium magnetite as raw material, chromium, due to its similar properties to vanadium,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/00
CPCC01G31/003C01P2006/80
Inventor 李天夫
Owner 承德燕北冶金材料有限公司
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