Method for producing high-purity vanadium pentoxide

A vanadium pentoxide, high-purity technology, applied in vanadium oxide and other directions, can solve the problem of high implementation cost, and achieve the effects of reducing environmental pollution, saving reagents, and novel and advanced technology

Active Publication Date: 2013-02-13
HUNAN ZHONGXIN NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the implementation cost of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for producing high-purity vanadium pentoxide, the steps are:

[0017] ①Pour deionized water into the first reaction kettle, heating temperature is 85℃; pour crude ammonium metavanadate into deionized water, the weight ratio of crude ammonium metavanadate to deionized water is 1:3.5; stir and dissolve ;

[0018] ② Keep the water temperature of the solution, put chemically pure flake sodium hydroxide into the solution to adjust the pH value, seal and stir, collect the escaped ammonia gas, compress and send the gas storage bag; when the pH value of the reaction solution reaches 9, stop adding Flake sodium hydroxide; add calcium chloride, stir to remove anion impurities;

[0019] ③Export the reaction solution after removing anionic impurities from the first reaction kettle, and filter; directly add chemically pure sheet-shaped sodium hydroxide to the container connected to the filtrate, stir to remove cationic impurities, and adjust the pH value to 10; stop stirri...

Embodiment 2

[0024] A method for producing high-purity vanadium pentoxide, is characterized in that, comprises the following steps:

[0025] ①Pour deionized water into the first reaction kettle, the heating temperature is 95°C; pour the crude ammonium metavanadate into deionized water, the weight ratio of crude ammonium metavanadate to deionized water is 1:3.8; stir and dissolve ;

[0026] ② Keep the water temperature of the solution, put chemically pure flake sodium hydroxide into the solution to adjust the pH value, seal and stir, collect the escaped ammonia gas, compress it and send it to the gas storage bag; when the pH value of the reaction solution reaches 10, stop adding Flake sodium hydroxide; add calcium chloride, stir to remove anion impurities;

[0027] ③Export the reaction liquid after removing anionic impurities from the first reaction kettle, and filter; directly add chemically pure sheet-shaped sodium hydroxide to the container connected to the filtrate, stir to remove cati...

Embodiment 3

[0032]A method for producing high-purity vanadium pentoxide, is characterized in that, comprises the following steps:

[0033] ①Pour deionized water into the first reaction kettle, and the heating temperature is 90°C; pour the crude ammonium metavanadate into deionized water, the weight ratio of crude ammonium metavanadate to deionized water is 1:4; stir and dissolve ;

[0034] ② Keep the water temperature of the solution, put chemically pure flake sodium hydroxide into the solution to adjust the pH value, seal and stir, collect the escaped ammonia gas, compress it and send it to the gas storage bag; when the pH value of the reaction solution reaches 8, stop adding Flake sodium hydroxide; add calcium chloride, stir to remove anion impurities;

[0035] ③Export the reaction liquid after removing anionic impurities from the first reaction kettle, and filter; directly add chemically pure sheet-shaped sodium hydroxide to the container connected to the filtrate, stir to remove cati...

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Abstract

The invention relates to a method for producing high-purity vanadium pentoxide by utilizing ammonium metavanadate. The method comprises the following steps of dissolving crude ammonium metavanadate in 85-98 DEG C deionized water, regulating the pH value of a sodium hydroxide regulation solution to be 8-10, adding calcium chloride for removing impurities so as to further regulate the pH value of the filter liquid to be 10-12, removing the impurities out of the filter liquid again, introducing ammonia gas in the filter liquid under increased pressure, and releasing the pressure; and carrying out ultrasonic atomization, crystallizing when the ammonium metavanadate is cooled, scrapping crystals, washing in water, and roasting the washed crystals at 500-550 DEG C to obtain the vanadium pentoxide with the purity of 99.95%. The method for producing the high-purity vanadium pentoxide disclosed by the invention combines physical purification and chemical purification which supplements each other, has the advantages of novel and advanced process, low medical agent consumption, low production cost and can be industrialized favorably.

Description

technical field [0001] The invention relates to a method for producing vanadium pentoxide with a purity greater than or equal to 99.9%. Background technique [0002] High-purity vanadium pentoxide 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 the standard of ordinary vanadium pentoxide GB3283-87. Because the country has not set a high standard, vanadium pentoxide with a purity higher than the national standard is high-purity vanadium pentoxide. High-purity vanadium pentoxide as defined in the present invention refers to vanadium pentoxide with a purity greater than or equal to 99.9%. [0003] With the continuous progress of science and technology, vanadium aluminum alloy, vanadium nitride, vanadium carbide, metal vanadium, vanadium wire, 80 vanadium iron. Vanadium batteries are also on the way. All these products need to be produced with high-purity vanadium pentoxi...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 张春雨
Owner HUNAN ZHONGXIN NEW MATERIALS TECH
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