Production method of vanadic oxide

A vanadium pentoxide and production method technology, applied in the field of resource recovery, can solve problems such as difficult to meet the purity requirements of vanadium products, low total recovery rate, environmental pollution, etc., achieve high grade, reduce production investment costs, processes and equipment simplified effect

Inactive Publication Date: 2014-09-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Though above-mentioned several methods all have obtained the qualified vanadium pentoxide product from vanadium-containing acid leaching solution (being vanadium-containing acid leaching solution), all there is environmental pollution in various degree, complicated process, total recovery rate partial in technological process. low level problem
At the same time, the purity of the obtained vanadium pentoxide is still within 99.5%, which is difficult to meet the requirements of the aerospace, electronic chemical industry, and electrochemical industries for the purity of vanadium products, especially the purity requirements of vanadium battery raw materials

Method used

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  • Production method of vanadic oxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] a. Extraction: extract 200mL of the vanadium-containing acid immersion solution, the obtained supernatant is the loaded organic phase, and the lower supernatant is the extraction residue;

[0057] Wherein, by volume ratio in the extractant, N235: sulfonated kerosene: tributyl phosphate=5:87.5:7.5, the extraction ratio (O / A)=1:1; The company's vanadium slag is added with suitable calcium oxide and roasted, and the vanadium-containing acid immersion solution obtained by leaching with dilute sulfuric acid has a vanadium concentration of 7.46g / L and an original pH value of 2.4. Before extraction, adjust its pH to 2.0;

[0058] b. Washing: wash the loaded organic phase with 0.2mol / L sodium sulfate solution;

[0059] c, back extraction: take 0.25mol / L sodium carbonate solution as back extraction agent, carry out back extraction to the loaded organic phase after washing, back extraction ratio (O / A)=2:1, after two-phase separation, obtain The supernatant liquid is the regenera...

Embodiment 2

[0066] a. Extraction: extract 250mL of the vanadium-containing acid immersion solution, the obtained supernatant is the loaded organic phase, and the lower supernatant is the extraction residue;

[0067] Wherein, by volume ratio in the extractant, N235: sulfonated kerosene: tributyl phosphate = 10: 87.5: 2.5, extraction ratio (O / A) = 1: 1; The company's vanadium slag is added with suitable calcium oxide and roasted, and the vanadium-containing acid immersion solution obtained by leaching with dilute sulfuric acid has a vanadium concentration of 7.68g / L and an original pH value of 2.3. Before extraction, adjust its pH to 2.0;

[0068] b. Washing: wash the loaded organic phase with 0.3mol / L sodium sulfate solution;

[0069] c, back extraction: take 0.3mol / L sodium carbonate solution as back extraction agent, carry out back extraction to the loaded organic phase after washing, back extraction ratio (O / A)=2:1, after two-phase separation, obtain The supernatant liquid is the regen...

Embodiment 3

[0076] a. Extraction: extract 200mL of the vanadium-containing acid immersion solution, the obtained supernatant is the loaded organic phase, and the lower supernatant is the extraction residue;

[0077] Wherein, in the extractant, by volume ratio, N235: sulfonated kerosene: tributyl phosphate=15:75:10, the extraction ratio (O / A) is=1:1; the vanadic acid immersion solution is Chuanwei The vanadium-containing acid immersion solution obtained by leaching with dilute sulfuric acid after adding suitable calcium oxide to the vanadium slag of Iron and Steel Group Co., Ltd. has a vanadium concentration of 7.76g / L and an original pH value of 2.4. Before extraction, adjust its pH to 2.0;

[0078] b. Washing: wash the loaded organic phase with 0.5mol / L sodium sulfate solution;

[0079]c, back extraction: take 0.2mol / L sodium carbonate solution as back extraction agent, carry out back extraction to the loaded organic phase after washing, back extraction ratio (O / A)=2:1, after two-phase s...

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Abstract

The invention relates to a production method of vanadic oxide, belonging to the field of resource recovery and solving the technical problem of providing a production method of the vanadic oxide. The production method of vanadic oxide comprises the following steps of a, extraction: extracting on immersion liquid which contains vanadic acid by taking a mixture formed from tertiary amine, sulfonated kerosene and tributyl phosphate as an extractant; b, washing: washing a loading organic phase; c, back extraction: carrying out the back extraction on the washed loading organic phase by taking a sodium carbonate solution as a back-extractant, wherein an obtained supernatant is a regenerated organic phase, and an obtained subnatant is back extraction liquid; d, acidic ammonium salt vanadium precipitation: stirring the back extraction liquid to obtain precipitates; e, washing the precipitates; calcining the washed precipitates to obtain the vanadic oxide. The product obtained through the production method is high in grade, and the purity of the final vanadic oxide achieves more than 99.99%. According to the production method, the recovery rate of an integral production process exceeds 76%.

Description

technical field [0001] The invention relates to a production method of vanadium pentoxide and belongs to the field of resource recovery. Background technique [0002] The extraction of vanadium from vanadium slag generally adopts hydrometallurgical process. The hydrometallurgical process generally uses salt, roasting and acid leaching to make vanadium enter the solution. After the solution is purified, V is obtained by precipitation of vanadium. 2 o 5 . Taking sodium roasting as an example with the addition of sodium salt as an example, the basic principle is to use salt, soda, and Glauber's salt as additives to convert multivalent vanadium into water-soluble sodium salt of pentavalent vanadium through roasting, and then roast the sodium The product is directly soaked in water, and can be extracted into the leach solution containing vanadium and sodium impurities, and then acidic ammonium salt is added to make ammonium polyvanadate, and the V obtained by calcination 2 o ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22
Inventor 唐红建孙朝晖鲜勇余彬陈海军尹丹凤杜光超景涵王唐林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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