Method for preparing high purity vanadium pentoxide through using ammonium metavanadate

A technology of vanadium pentoxide and ammonium metavanadate, which is applied in the direction of vanadium oxide, etc., can solve the problems of high production cost, long process flow, and insufficient purity, and achieve the effect of low cost, short process flow and simple equipment

Inactive Publication Date: 2012-10-17
崇阳县恒通工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is long, labor-intensive, and costly, and the purity of most vanadium pento

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add crude ammonium metavanadate to water at a weight ratio of 1:4, heat to 90°C while stirring at a speed of 120r / min, keep for 20-30 minutes to completely dissolve ammonium metavanadate, and adjust with caustic soda after dissolution When the pH value reaches 9, add magnesium chloride to remove impurities, filter with a plate and frame filter press to obtain a sodium metavanadate solution, add ammonium chloride to the sodium metavanadate solution to precipitate ammonium metavanadate, and ammonium metavanadate After the precipitate is dehydrated by a centrifuge, it is directly washed with 1% dilute ammonium chloride solution in the centrifuge for 10 minutes, then dehydrated and roasted to obtain high-purity vanadium pentoxide. After analysis, the purity of vanadium pentoxide can reach 99.9%.

Embodiment 2

[0017] Add crude ammonium metavanadate to water at a weight ratio of 1:4, heat to 95°C while stirring at a speed of 120r / min, keep for 20-30 minutes to completely dissolve ammonium metavanadate, and adjust with caustic soda after dissolution When the pH value reaches 10, add magnesium sulfate to remove impurities, filter with a plate and frame filter press to obtain a sodium metavanadate solution, add ammonium chloride to the sodium metavanadate solution to precipitate ammonium metavanadate, and metavanadate After the ammonium precipitate is dehydrated by a centrifuge, it is directly washed with 5% dilute ammonium chloride solution in the centrifuge for 15 minutes, then dehydrated and roasted to obtain high-purity vanadium pentoxide. After analysis, the purity of vanadium pentoxide can reach 99.9%.

Embodiment 3

[0019] Add crude ammonium metavanadate to water at a weight ratio of 1:4, heat to 95°C while stirring at a speed of 120r / min, and keep for 20-30 minutes to completely dissolve ammonium metavanadate. After dissolving, use caustic soda and Adjust the pH value of the mixture of sodium carbonate to 9, add magnesium sulfate to remove impurities, filter with a plate and frame filter press filter to obtain sodium metavanadate solution, add ammonium chloride to the sodium metavanadate solution to precipitate ammonium metavanadate Precipitation, ammonium metavanadate precipitation After being dehydrated by a centrifuge, it is directly washed with 1% dilute ammonium bicarbonate solution in a centrifuge for 10 minutes, then dehydrated and roasted to obtain high-purity vanadium pentoxide. After analysis, the purity of vanadium pentoxide can reach 99.9%.

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Abstract

The invention which relates to a method for preparing high purity vanadium pentoxide through using ammonium metavanadate belongs to the wet metallurgy field. The method comprises the following steps: heating and dissolving crude ammonium metavanadate in water, adjusting the pH value to 8-10 with an alkali after dissolving, adding an impurity removing agent to remove impurities, filtering to obtain a sodium metavanadate solution, adding ammonia water or an ammonium salt to the sodium metavanadate solution to precipitate to obtain an ammonium metavanadate precipitate, dehydrating the ammonium metavanadate precipitate, carrying out water washing on the precipitate through using a dilute ammonium salt solution, dehydrating after the wash washing, and roasting to obtain the high purity vanadium pentoxide. Vanadium pentoxide produced through adopting the method of the invention has the advantages of high purity and less impurities, and completely satisfies production requirements of high-end products; and the method of the invention has the advantages of short process flow, simple equipment, low cost and high benefit, and is suitable for the large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing high-purity vanadium pentoxide by using ammonium metavanadate, which belongs to the category of hydrometallurgy. Background technique [0002] High-purity vanadium pentoxide vanadium refers to reducing the content of silicon, phosphorus, iron and other impurities in vanadium to be lower than the national standard limit on the basis of ordinary vanadium pentoxide GB3283-87 standard. Because the country has not set a high standard, vanadium pentoxide with a purity higher than the national standard is high-purity vanadium pentoxide. [0003] With the continuous advancement of science and technology, Panzhihua has developed micro-alloyed hot-rolled steel rails, X52-grade pipes, wire steels and micro-alloyed steel plates for automobile girders. At the same time, vanadium aluminum alloy, vanadium nitride, vanadium carbide, metal vanadium, vanadium wire, and 80 vanadium iron are newly launched in many places. ...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 丁利亚
Owner 崇阳县恒通工贸有限公司
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