Preparation method of high-purity vanadium oxide

A vanadium pentoxide, high-purity technology, applied in the field of chemicals, can solve problems such as poor purity of vanadium pentoxide

Inactive Publication Date: 2017-10-24
WUHU RENBEN ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this invention is to provide a kind of preparation method of high-purity vanadium pentoxide, solve the poor problem of the purity of current vanadium pentoxide, to produce the vanadium pentoxide of high-purity reagent grade

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  • Preparation method of high-purity vanadium oxide

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preparation example Construction

[0018] The present invention provides a kind of preparation method of high-purity vanadium pentoxide, and this preparation method comprises:

[0019] (1) Industrial grade ammonium metavanadate is dissolved in alkaline solution, and vanadium is adsorbed by basic anion exchange resin;

[0020] (2) Analyze the basic anion exchange resin after adsorption to obtain a vanadium-containing solution;

[0021] (3) contacting the vanadium-containing solution with an acidic cation exchange resin to obtain a purified vanadium-containing solution;

[0022] (4) adding a vanadium precipitation agent to the purified vanadium-containing solution to obtain primary ammonium metavanadate;

[0023] (5) recrystallizing, washing and drying the primary ammonium metavanadate to obtain high-purity ammonium metavanadate;

[0024] (6) Calcining the high-purity ammonium metavanadate to obtain high-purity vanadium pentoxide.

[0025] According to the present invention, preferably, the alkaline solution i...

Embodiment 1

[0037] The present embodiment provides a kind of preparation method of high-purity vanadium pentoxide, and this preparation method comprises:

[0038] (1) dissolving technical grade ammonium metavanadate in the ammoniacal liquor that mass concentration is 15wt%, carries out vanadium adsorption by basic anion exchange resin, and the condition of described vanadium adsorption is: pH value is 7-8, and flow velocity is 2 times the column volume, the contact time is 60 minutes, when the vanadium content of the effluent reaches more than 2ppm, the resin is saturated and stops adsorption; wherein, the basic anion exchange resin is a gel-type anion capable of selectively adsorbing metavanadate ions exchange resin;

[0039] (2) Analyzing the basic anion exchange resin after adsorption with aqueous ammonia to obtain a vanadium-containing solution;

[0040] (3) contacting the vanadium-containing solution with an acidic cation exchange resin to obtain a purified vanadium-containing solut...

Embodiment 2

[0045] The present embodiment provides a kind of preparation method of high-purity vanadium pentoxide, and this preparation method comprises:

[0046] (1) Industrial grade ammonium metavanadate is dissolved in the sodium hydroxide solution that mass concentration is 15wt%, carries out vanadium adsorption by basic anion exchange resin, and the condition of described vanadium adsorption is: pH value is 7-8, The flow rate is 2 times the column volume, and the contact time is 60 minutes. When the vanadium content of the effluent reaches more than 2ppm, the resin is saturated and stops adsorption; wherein, the basic anion exchange resin is a gel that can selectively adsorb metavanadate ions Colloidal anion exchange resin;

[0047] (2) Analyzing the basic anion exchange resin after adsorption with aqueous ammonia to obtain a vanadium-containing solution;

[0048] (3) contacting the vanadium-containing solution with an acidic cation exchange resin to obtain a purified vanadium-conta...

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Abstract

The invention discloses a method for preparing high-purity vanadium pentoxide. The preparation method comprises: (1) dissolving industrial-grade ammonium metavanadate in an alkali solution, and performing vanadium adsorption through an alkaline anion exchange resin; (2) ) analyzing the adsorbed basic anion exchange resin to obtain a vanadium-containing solution; (3) contacting the vanadium-containing solution with an acidic cation-exchange resin to obtain a purified vanadium-containing solution; (4) adding the purified The vanadium-containing solution is added with a vanadium precipitation agent to obtain primary ammonium metavanadate; (5) the primary ammonium metavanadate is recrystallized, washed, and dried to obtain high-purity ammonium metavanadate; (6) the high-purity ammonium metavanadate is Ammonium metavanadate is calcined to obtain high-purity vanadium pentoxide. The purity of the vanadium pentoxide of the present invention can reach more than 99.5%.

Description

technical field [0001] The invention belongs to the field of chemicals, and more specifically relates to a preparation method of high-purity vanadium pentoxide. Background technique [0002] Vanadium pentoxide is widely used in metallurgy, chemical industry and other industries, mainly for smelting ferrovanadium. Used as an alloy additive, accounting for more than 80% of the total consumption of vanadium pentoxide, followed by a catalyst for organic chemical industry, that is, a catalyst, accounting for about 10% of the total, and used elsewhere as inorganic chemicals, chemical reagents, enamel And magnetic materials account for about 10% of the total. [0003] At present, vanadium pentoxide is mainly produced by ammonium metavanadate. Because commercially available ammonium metavanadate is mainly obtained by refining, synthesizing and purifying vanadium ore. However, due to the complicated preparation process and the difference of vanadium ore, the produced ammonium meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
CPCC01G31/02C01G31/003C01P2006/80
Inventor 鲁冲鲁爱霞窦勇
Owner WUHU RENBEN ALLOY
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