Method for preparing vanadium pentoxide

A vanadium pentoxide and production method technology, applied in the direction of vanadium pentoxide, etc., can solve the problems of no high-purity vanadium pentoxide and incomplete dissolution

Inactive Publication Date: 2006-10-11
宿素满
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] At present, the vanadium pentoxide sold in the domestic market contains less than 50% of the vanadium dry basis, which cannot be completely dissolved in nitric acid, and there is no high-purity vanadium pentoxide with a purity ≥ 99.5%.

Method used

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Examples

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Embodiment Construction

[0007] Using ammonium vanadate, industrial-grade vanadium pentoxide or waste catalyst discharged from the production of sulfuric acid as raw materials, first put pure water into the reaction tank and heat it to about 90°C, then put in the raw materials, the weight ratio of raw materials to water is about 1 : 13, slowly add ammonium hydroxide solution while stirring, the pH value reaches 7-8 after the raw materials are completely dissolved, filter to remove impurities, put the filtrate into another reaction tank, heat to 90°C, add concentration while stirring The reagent sulfuric acid is 1:1-2, the adding process is controlled within 8-12 minutes, so that the pH value reaches 2-3, the temperature of the whole process is kept at about 90°C, the reaction time is 30-40 minutes, and the pH value of the solution drops to 6 -7. Check whether the oxidation precipitation reaction is complete. The method is to take out the original solution in the tank and put it in a glass cup. There i...

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Abstract

The invention relates to a method for preparing vanadic anhydride. It comprises following steps: employing ammonium vanadate, vanadic anhydride of technical grade or waste catalyst discharged in sulfuric acid preparation process; treating with ammonium hydroxide, sulfuric acid and ammonium chloride, washing with water; getting fine active vanadic anhydride; removing foreign matter with ammonium hydroxide, calcium hydroxide, sodium aluminate, sodium silicate, sulfuric acid and ammonium chloride; washing with water again; drying; calcing at 670 Deg. C and getting high-purity vanadic anhydride. The invention is characterized in that it makes use of current material to prepare chemical materials urgently needed by industrial production, and saves a large amount of foreigh exchange.

Description

[technical field] [0001] The invention relates to a production method for producing refined active vanadium pentoxide containing 50-54% vanadium on a dry basis, fully dissolved in nitric acid, and producing vanadium pentoxide with a purity ≥ 99.5%. [Background technique] [0002] At present, the vanadium pentoxide sold in the domestic market contains less than 50% vanadium on a dry basis, cannot be completely dissolved in nitric acid, and there is no high-purity vanadium pentoxide with a purity ≥ 99.5%. At present, the above-mentioned products urgently needed by my country's chemical production can only be imported from abroad at a large amount of foreign exchange. [Content of the invention] [0003] The purpose of this invention is to provide a kind of production method of vanadium pentoxide, can produce the vanadium-containing dry basis 50-54%, the refined active vanadium pentoxide that can dissolve completely in nitric acid, and further produce on this basis High-purit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 宿素满韩忠民
Owner 宿素满
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