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A method for preparing vanadium pentoxide

A vanadium pentoxide, pentavalent technology, applied in vanadium oxide and other directions, can solve the problems of acid mist pollution, large amount of wastewater treatment, long reaction time, etc., and achieves high vanadium precipitation rate, energy saving and simple operation. Effect

Active Publication Date: 2019-03-19
SICHUAN PAN YAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of the existing acidic ammonium salt vanadium precipitation process, which leads to large waste water treatment volume, acid mist pollution, long reaction time and other problems caused by steam heating, and to provide a new, efficient and environmentally friendly method for preparing vanadium pentoxide , the method has the advantages of simple operation, short process, no pollution, high vanadium deposition rate, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take the vanadium-containing solution (TV19.82g / L, P2 o 5 product.

Embodiment 2

[0044] Get 200mL of the vanadium-containing solution (TV22.94g / L, P is 0.018g / L, Si is 0.14g / L, pH=3.34) obtained by calcification roasting-acid leaching-purification of vanadium slag provided by a vanadium plant, press The molar ratio of TV to tetrabutylammonium ion is 1:0.5. Add tetrabutylammonium bisulfate, stir at room temperature for 5min, filter, wash and dry to obtain tetrabutylammonium polyvanadate precipitate and polyvanadate containing tetrabutylammonium 0.11g / L Vanadium precipitation supernatant, vanadium precipitation rate reaches 99.5%, tetrabutylammonium polyvanadate precipitation is calcined at 550°C for 2 hours, and V with a purity of 99.62% is obtained. 2 o 5 product.

Embodiment 3

[0046] Take the vanadium-containing solution (TV33.86g / L, P2 o 5 product.

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Abstract

The invention belongs to the field of vanadium oxide extraction and specifically relates to a method for preparing vanadium pentoxide. The technical problem to be solved by the invention is to provide the method for preparing vanadium pentoxide. The method comprises the following steps: adding sufficient quaternary ammonium salt into an acidic vanadium-containing solution, stirring and reacting and then separating sediment, washing the sediment, drying and calcining, thus obtaining vanadium pentoxide. The method disclosed by the invention has the advantages of simple operation, safety, no pollution, effect of saving energy consumption, high molybdenum precipitation rate, and the like.

Description

technical field [0001] The invention belongs to the field of vanadium oxide extraction, and in particular relates to a method for preparing vanadium pentoxide. Background technique [0002] Vanadium pentoxide is a reddish-brown crystalline powder or gray-black flake, slightly soluble in water, insoluble in ethanol, soluble in strong acid and strong alkali, widely used in metallurgy, chemical industry and other industries, mainly for smelting ferrovanadium. At present, the preparation method of vanadium pentoxide is mainly to obtain powdery vanadium pentoxide by calcining ammonium polyvanadate or fusing flakes to obtain flake vanadium pentoxide, that is, ammonium polyvanadate is used as raw material. At present, the more common method for preparing ammonium polyvanadate is the acidic ammonium sulfate precipitation method, and the specific process is to precipitate ammonium polyvanadate from a vanadium-containing solution under acidic conditions. The acidic ammonium salt prec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
CPCC01G31/02C01P2006/80
Inventor 叶露何文艺陈燕申彪
Owner SICHUAN PAN YAN TECH
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