Method for clean production of high-purity vanadium pentoxide by using hydrogen peroxide and ammonia water

A vanadium pentoxide, clean production technology, applied in the direction of vanadium oxide, chemical instruments and methods, ammonia compounds, etc., can solve the problems of vanadium loss and consumption, and achieve the effect of low impurity content, high purity and small investment

Active Publication Date: 2019-02-15
联和能源投资控股有限公司
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  • Abstract
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Problems solved by technology

[0007] Above-mentioned method can obtain the vanadium pentoxide of higher purity, but all needs first ammonium metavanadate or vanadium pentoxide raw material to carry out alkali dissolution, obtains vanadium-containing (V 2 o 5 ) 100-130g / L sodium vanadate solution, about 0.6 tons of sodium hydroxide per ton of vanadium pentoxide
The purification process needs to add 20-50 kg / m 3 Magnesium salts, and cause 2-5% vanadium loss

Method used

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  • Method for clean production of high-purity vanadium pentoxide by using hydrogen peroxide and ammonia water

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Embodiment 1

[0023] A method for clean production of high-purity vanadium pentoxide with hydrogen peroxide and ammonia, comprising the steps:

[0024] (1) 100g of V with a purity of 97% can be obtained after calcination 2 o 5 The crude ammonium metavanadate or the crude vanadium pentoxide with a purity of 96% are raw materials, adding mass fractions of ammonia and hydrogen peroxide to dissolve, slowly adding 4g of purifying agent to remove impurities while dissolving, and stirring;

[0025] (2) Filtration: quickly filter the above-mentioned dissolved solution, and separate the dissolution residue and dissolution liquid;

[0026] (3) Thermal decomposition: heat and stir the filtered filtrate obtained in step (2) to decompose peroxovanadate ions, and vanadium is precipitated in the form of ammonium polyvanadate, and the crystallized mother liquor is returned to step (1) for dissolution until polyvanadate is dissolved. Ammonium is completely precipitated, and ammonium polyvanadate is obtain...

Embodiment 2

[0033] A method for clean production of high-purity vanadium pentoxide with hydrogen peroxide and ammonia, comprising the steps:

[0034] (1) Take 50g of crude vanadium pentoxide with a purity of 97.5% as raw material, add 7% ammonia water and 0.8% hydrogen peroxide by mass fraction to dissolve, slowly add 3g of purifying agent to remove impurities while dissolving, and stir;

[0035] (2) Filtration: quickly filter the above-mentioned dissolved solution, and separate the dissolution residue and dissolution liquid;

[0036] (3) Thermal decomposition: heat and stir the filtered filtrate obtained in step (2) to decompose peroxovanadate ions, and vanadium is precipitated in the form of ammonium polyvanadate, and the crystallized mother liquor is returned to step (1) for dissolution until polyvanadate is dissolved. Ammonium is completely precipitated, and ammonium polyvanadate is obtained by filtration;

[0037] (4) Drying and calcination: The ammonium polyvanadate obtained in ste...

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Abstract

The invention relates to the technical field of vanadium pentoxide production, in particular to a method for clean production of high-purity vanadium pentoxide by using hydrogen peroxide and ammonia water. The method comprises the following steps: (1) taking roughly prepared ammonium metavanadate of V2O5 of which the purity is 95% to 98% after calcined and roughly prepared vanadium pentoxide of which the purity is 95% to 98% as raw materials, adding ammonia water and hydrogen peroxide to be dissolved, slowly adding a purifying agent to remove impurities while dissolving and stirring; (2) filtering; (3) heating to decompose; (4) drying and calcining; (5) recovering exhaust gas. The method for the clean production of high-purity vanadium pentoxide by using hydrogen peroxide and ammonia waterdisclosed by the invention has the beneficial effects that compared with the prior art, vanadium pentoxide produced by the method provided by the invention is high in purity, low in impurity content,simple in process, low in consumption of chemical reagents, low in discharge of three wastes (waste water, waste gas and waste residues), low in investment and easy to industrialize.

Description

technical field [0001] The invention relates to the technical field of producing vanadium pentoxide, in particular to a method for cleanly producing high-purity vanadium pentoxide by using hydrogen peroxide and ammonia water. Background technique [0002] As a rare metal with high melting point, vanadium is widely used in chemical industry, metallurgy, aerospace and other industries due to its excellent properties. With the rapid development of my country's modernization, the demand for vanadium and its compounds is increasing. Especially in recent years, the in-depth research and wide application of vanadium special alloys, vanadium-based hydrogen storage materials, nano-scale vanadium special-effect catalysts, vanadium high-end pigments, vanadium batteries and vanadium in the field of medicine have increasingly required high-purity vanadium and its compounds. high. At present, domestic manufacturers mainly use oxidative roasting-acid leaching-solvent extraction / ion excha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02C01C1/242
CPCC01C1/242C01G31/02C01P2006/80
Inventor 孙廷亮李青刚李亚琳曾理肖逢春姚坤
Owner 联和能源投资控股有限公司
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