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Preparation method of highly pure vanadium pentoxide

A vanadium pentoxide and high-purity technology, which is applied in the field of high-purity vanadium pentoxide preparation, can solve the problems of low continuous production, complicated impurity removal process and high production cost, and achieves low production cost, short production process, No running and dripping effect

Inactive Publication Date: 2014-10-15
SHAANXI WUZHOU MINING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impurity removal process of existing craft products is complicated, the product quality is not stable, the process is complicated, the degree of continuous production is low, and the production cost is high

Method used

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  • Preparation method of highly pure vanadium pentoxide
  • Preparation method of highly pure vanadium pentoxide
  • Preparation method of highly pure vanadium pentoxide

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Embodiment Construction

[0021] Embodiment of the present invention is described below in conjunction with accompanying drawing, embodiment does not constitute limitation of the present invention:

[0022] figure 1 It is a schematic flow chart of the all-wet vanadium extraction process, which is the prior art.

[0023] combine figure 2 : Polyvanadic acid supersaturation-precipitation transfer solution-ammonium bicarbonate precipitation transformation to prepare high-purity vanadium pentoxide;

[0024] Using the stripping water produced during the full-wet vanadium extraction process of stone coal vanadium ore as the raw material, the tetravalent vanadium in the solution is oxidized to pentavalent vanadium with the oxidant NaClO3 before the vanadium precipitation operation. The chemical reaction equation is as follows:

[0025] NaClO 3 +6VOSO 1 +3H 2 O=3(VO 2 ) 2 SO 4 +3H 2 SO 4 +NaCl

[0026] Because the solubility of pentavalent vanadium is very low (only 0.8g / L in aqueous solution), it d...

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Abstract

The invention relates to the field of the chemical industry, and especially relates to a preparation method of highly pure vanadium pentoxide. The method comprises the following steps: oxidizing tetravalent vanadium in back extraction water obtained in a total hydrometallurgical vanadium extraction process to form pentavalent vanadium; forming an oversaturated system of pentavalent vanadium, precipitating to obtain a polyvanadic acid precipitate, carrying out solid-liquid separation to separate a solution containing a high content of impurities, washing the polyvanadic acid precipitate, adding the washed precipitate to a sulfuric acid solution, carrying out heat insulation uniform stirring, and adding an ammonium bicarbonate solution to prepare a highly pure product, wherein polyvanadic acid gradually forms a polyammonium vanadate precipitate having a lower solubility due to the solubility of polyammonium vanadate is less than the solubility of polyvanadic acid; and calcining the polyammonium vanadate precipitate to generate vanadium pentoxide. The method has the advantages of no influences on present technologic main flow or production equipment, short production flow, low production cost, and no leakage or environmental protection due to closed circular running of the highly pure vanadium pentoxide production flow and original flow. 3000t of the highly pure vanadium pentoxide can be produced yearly.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing high-purity vanadium pentoxide. Background technique [0002] Vanadium and vanadium compounds are indispensable and important materials for the development of modern industry, modern national defense and modern science and technology. They are widely used in various fields such as iron and steel metallurgy, nonferrous metals, petrochemicals, energy, aerospace and nuclear industries. "The Vitamins of Modern Industry". Among the world's proven vanadium reserves, China's vanadium possession ranks third in the world. Stone coal is a unique vanadium resource in my country. It has been proven that stone coal contains 117.97 million tons of vanadium pentoxide, of which the reserves of more than 0.5% are 7707.5 tons. It is the vanadium-titanium magnetite in my country. 6.7 times of reserves, so the development and utilization of vanadium-containing stone coal has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B3/44
CPCY02P10/20
Inventor 谷利君戴子林孙会昌危青艾军郝文彬刘新运李云霄
Owner SHAANXI WUZHOU MINING
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