Process for preparing high-purity vanadium pentoxide by adopting ammonium metavanadate as raw material

A technology of vanadium pentoxide and ammonium metavanadate, applied in the direction of vanadium oxide, etc., can solve the problems of incomplete impurity removal and high impurity content, and achieve the effect of stable product quality and simple process control

Inactive Publication Date: 2012-07-25
湖南汇锋高新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a process for preparing high-purity vanadium p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example one:

[0014] Add 100kg of ammonium metavanadate to 400kg of water, heat to 65℃, and stir until the ammonium metavanadate is completely dissolved; add 0.5Kg of hydrogen peroxide, add an appropriate amount of sodium carbonate to adjust the pH of the vanadium solution to 9, stir evenly, and keep it warm for 1h; , Sodium citrate and magnesium chloride (the mass ratio is 1:1:1), stir and keep for 2h; cool the vanadium solution to 45°C, press filter, and put the filtrate into the vanadium sink to cool to below 40°C; press chlorine The mass ratio of ammonium chloride to vanadium pentoxide is 0.7:1. Add ammonium chloride to precipitate vanadium for 5h, and let stand until ammonium metavanadate is completely precipitated; put the ammonium metavanadate precipitate into the centrifuge and add the vanadium The deionized water with 6 times of ammonium acid was subjected to centrifugal dehydration and washing, and dehydrated to near dryness to obtain ammonium metavanadate produ...

Example Embodiment

[0015] Embodiment two:

[0016] Add 100kg of ammonium metavanadate to 450kg of water, heat to 75℃, and stir until ammonium metavanadate is completely dissolved; add 0.5Kg of hydrogen peroxide, add appropriate amount of sodium carbonate, adjust the pH of the vanadium solution to 9.5, stir and keep for 1h; add 50g of oxalic acid , Sodium citrate, magnesium chloride, fly ash (the mass ratio is 1:1:1:2), stir and keep for 3h; cool the vanadium solution to 40°C, filter by pressure, and put the filtrate in the vanadium sink for cooling; According to the mass ratio of vanadium pentoxide and ammonium chloride of 1:1.2, add ammonium chloride to precipitate vanadium. The time of precipitation is 8h, until ammonium metavanadate is completely precipitated; the ammonium metavanadate is precipitated into the centrifuge and the vanadium is added. 7 times the deionized water of ammonium acid was subjected to centrifugal dehydration washing, and dehydrated to near dryness to obtain ammonium metav...

Example Embodiment

[0017] Embodiment three:

[0018] Add 100kg of ammonium metavanadate to 500kg of water, heat to 85℃, stir until the ammonium metavanadate is completely dissolved; add 0.5Kg of hydrogen peroxide, add appropriate amount of sodium carbonate to adjust the pH of the vanadium solution to 10, stir and keep for 1h; add 70g of citric acid Sodium, magnesium chloride, fly ash (the mass ratio is 2:2:3), stir and keep for 4h; cool the vanadium solution to 40°C, press filter, and put the filtrate into the vanadium sink to cool to below 40°C; press The mass ratio of vanadium pentoxide to ammonium chloride is 1:1.5. Add ammonium chloride to precipitate vanadium. The time of vanadium precipitation is 12h until the ammonium metavanadate is completely precipitated; the ammonium metavanadate is deposited into the centrifuge and the metavanadic acid Deionized water with 8 times of ammonium is subjected to centrifugal dehydration washing, and dehydrated to near dryness to obtain ammonium metavanadate ...

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Abstract

The invention discloses a process for preparing high-purity vanadium pentoxide by adopting ammonium metavanadate as a raw material. The process comprises the following step of obtaining a high-purity vanadium pentoxide product after an ammonium metavanadate crude product is treated by adopting the processes of dissolving, adjusting pH, removing impurities by an impurity removing agent, precipitating vanadium for removing impurities, and calcining and the like. By detection, the content of the high-purity vanadium pentoxide prepared by adopting the process can be up to more than 99.5%, and the content of the impurity is less than 100ppm. The process disclosed by the invention has the advantages that the control is simple, the quality of a product is stable, no pollution is caused to the environment, and the requirement for clean production is met and the like. The process is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation process of vanadium pentoxide, in particular to a process for preparing high-purity vanadium pentoxide by using ammonium metavanadate as a raw material. Background technique [0002] my country is rich in vanadium resources, and vanadium products are widely used. In recent years, with the advancement of technology, the industrial production of some vanadium downstream high-end technology products has higher requirements for the quality of vanadium compounds. High-purity vanadium pentoxide is widely used in aerospace industry, nuclear industry, solar energy, wind power storage and equipment, coatings, catalysts, luminescent materials and other fields. Especially in the field of energy storage in the new energy industry - the vanadium battery industry is developing rapidly. The domestic supply of high-purity vanadium pentoxide cannot meet the domestic quality and market demand, mainly relying on imports. Therefore...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 王远望阳更君
Owner 湖南汇锋高新能源有限公司
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