Method for preparing high-purity ammonium polyvanadate

An ammonium polyvanadate, high-purity technology, applied in the preparation of vanadium compounds, chemical instruments and methods, vanadium compounds, etc., can solve problems such as being difficult to be effectively promoted, and achieve automatic remote control, dense particle size, and beneficial effects. The effect of uniform growth

Active Publication Date: 2019-08-06
承德燕北冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain problems in each of the

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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Abstract

The invention relates to a method for preparing high-purity ammonium polyvanadate. The method comprises the following steps: adding ferrous sulfate to a vanadium-containing solution, and performing stirring for a reaction; adding a silicon precipitating agent after the reaction is completed, performing stirring for a reaction, and carrying out solid-liquid separation; primarily adsorbing a solution obtained after the solid-liquid separation by using aminophosphoric acid resin; secondarily adsorbing the solution by using iminodiacetic acid chelated resin after the primary adsorption is completed; and adding ammonium sulfate to the secondarily adsorbed solution to precipitate vanadium, and performing solid-liquid separation to obtain the ammonium polyvanadate product. The method removes chromium, iron, magnesium, aluminum, silicon and other impurity elements in the vanadium-containing solution through process improvement and reagent control, and allows the ammonium polyvanadate product with a purity of above 99.9% to be obtained; and the high-purity ammonium polyvanadate product can be used to prepare other high-purity vanadium products, and has a good application prospect when applied to fields of metallurgy, aerospace, chemistry, batteries, pigments, glass, optics, medicines and the like.

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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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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