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Method for producing high purity vanadic anhydride

A technology of vanadium pentoxide and a production method, applied in vanadium oxide and other directions, can solve the problems of uneven product quality, harm, excessive impurity content, etc., and achieve the effects of high purity, simple production equipment and less impurities

Active Publication Date: 2009-06-17
WUHU RENBEN ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the application of vanadium in special fields, it is required that vanadium must have extremely high purity; excessive impurity content or uneven product quality will cause fatal hazards

Method used

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  • Method for producing high purity vanadic anhydride
  • Method for producing high purity vanadic anhydride
  • Method for producing high purity vanadic anhydride

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) Add 100Kg of ammonium metavanadate into 350Kg of water, add ammonia water when heated to 80°C, and add while stirring until the ammonium metavanadate is completely dissolved;

[0026] 2) Add an appropriate amount of alum to remove Si in the solution, add a mixture of sodium hydroxide and sodium carbonate to remove elements such as Pb, Fe, Ca, Cu, Ni, As, Cr, Cd, and then undergo natural precipitation and clarification.

[0027] 3) Remove impurities from the supernatant, and when heated to 80°C, add oxidant KClO to the solution 3 , add while stirring, the divalent vanadium in the solution is oxidized to pentavalent vanadium, KClO 3 The addition amount is 1.5kg;

[0028] 4) Heat the fully oxidized solution to 95°C in the reaction kettle, add sulfuric acid to adjust the pH value to 2.5 and stir at a speed of 100r / min until the brown solid is completely precipitated;

[0029] 5) then vacuum filtration, dehydration and drying to obtain a brown powdery solid;

[0030] 6...

Embodiment 2

[0034] 1) Add 100Kg of ammonium metavanadate to 300Kg of water, add ammonia water when heated to 90°C, and add while stirring until the ammonium metavanadate is completely dissolved;

[0035] 2) the method identical with embodiment 1 removes the contained impurity of ammonium metavanadate;

[0036] 3) When the impurity-removed supernatant is heated to 90°C, add the oxidizing agent KClO to the solution 3 , add while stirring, the divalent vanadium in the solution is oxidized to pentavalent vanadium, KClO 3 The addition amount is 1.8kg;

[0037] 4) Heat the fully oxidized solution to 90°C in the reaction kettle, add sulfuric acid to adjust the pH value to 3 and stir at a speed of 120r / min until the brown solid is completely precipitated;

[0038] 5) then vacuum filtration, dehydration and drying to obtain a brown powdery solid;

[0039] 6) Calcining the dried powdery solid in an oxidizing atmosphere at a temperature of 530° C. for 2.5 hours.

[0040] All dissolution, separat...

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Abstract

The invention relates to a method for producing high-purity vanadium pentoxide, which comprises the following steps: performing dissolution, namely adding crude ammonium metavanadate into an aqueous solution, and adding ammonia water under the stirring condition when heating the solution to be between 80 and 90 DEG C until the ammonium metavanadate is completely dissolved; adding different impurity removal reagents to separate impurities; filtering the solution after the impurities are separated; placing the filtered solution into a reaction kettle, adding an oxidant, and oxidizing bivalent vanadium into quinquevalent vanadium; acidifying the completely oxidized solution and separating out brown vanadium pentoxide; performing vacuum filtration and dehydration drying on the brown vanadium pentoxide; and placing the dried vanadium pentoxide into a rotary oven for calcination. The production method uses equipment such as a disk-type vacuum filter, the reaction kettle and the rotary oven.The vanadium pentoxide produced by the method has high purity and few impurities, and is used in the fields of organically synthesized catalyst and aerospace. The method has simple production equipment and high production benefit, and is suitable for industrial mass production.

Description

technical field [0001] The invention relates to a production method of high-purity vanadium pentoxide. Background technique [0002] Due to its inherent physical and chemical properties, vanadium is widely used in various fields of national defense construction and economic construction. In the metallurgical industry, vanadium can refine grains, improve the heat resistance and strength of steel, and is often used in the production of stainless steel, Tank steel and high-strength structural steel; in the aerospace industry vanadium ensures low density and high strength, and the ability to maintain its strength at high temperatures. About 10% of vanadium in the world is used in titanium alloys. 1% vanadium in titanium alloys can be used as a strengthening agent and stabilizer. When 4% vanadium is added to titanium alloys, the alloy has good ductility and formability. The two most important alloys in titanium alloys are Ti-6Al-4V and Ti-8Al-1Mo-1V, which together account for m...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 黄文江窦春光鲁冲王有权
Owner WUHU RENBEN ALLOY
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