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Preparation method of high-purity tungsten trioxide

A tungsten trioxide and high-purity technology, applied in the field of preparation of high-purity tungsten trioxide, can solve the problems of large amount of waste water, unstable product quality and high production cost in the production process, and ensure the stability of output and quality. Product output and performance are stable, and the effect of increasing service life

Active Publication Date: 2017-02-08
江西翔鹭钨业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of tungsten trioxide, which is used to solve the problems of high production cost, unstable product quality, large amount of waste water in the production process and cumbersome process in the preparation of high-purity tungsten trioxide in the prior art

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  • Preparation method of high-purity tungsten trioxide

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Embodiment 1

[0037] A preparation method of high-purity tungsten trioxide, comprising the following steps:

[0038] The first step: dissolving, dissolving the tungsten ore with potassium hydroxide solution (mass concentration is 30%) and filtering to remove precipitated impurities;

[0039] The second step: hydrolyzing and precipitating tungsten, adding sulfuric acid to the solution of the first step, the concentration of tungsten in the solution is 10g / L, the pH value is 2.0, the temperature value is 70°C, stirring and reacting for 60 minutes to hydrolyze and precipitate tungsten;

[0040] The third step: filtering, filtering the above solution to obtain tungsten hydrolyzate and acidic waste liquid;

[0041] The fourth step: secondary dissolution, adding deionized water to the tungsten hydrolyzate obtained in the third step, then adding potassium hydroxide solution (mass concentration is 30%), filtering to obtain a tungsten-containing solution, and continuing to the filtrate Add deionize...

Embodiment 2

[0049] A preparation method of high-purity tungsten trioxide, comprising the following steps:

[0050] The first step: dissolving, dissolving the tungsten ore with potassium hydroxide solution (mass concentration is 35%) and filtering to remove precipitated impurities;

[0051] The second step: hydrolyzing and precipitating tungsten, adding sulfuric acid to the solution of the first step, the concentration of tungsten in the solution is 35g / L, the pH value is 2.5, the temperature value is 85°C, stirring and reacting for 70 minutes to hydrolyze and precipitate tungsten;

[0052] The third step: filtering, filtering the above solution to obtain tungsten hydrolyzate and acidic waste liquid;

[0053] The fourth step: secondary dissolution, adding deionized water to the tungsten hydrolyzate obtained in the third step, then adding potassium hydroxide solution (mass concentration is 35%), filtering to obtain a tungsten-containing solution, and continuing to the filtrate Add deionized ...

Embodiment 3

[0061] A preparation method of high-purity tungsten trioxide, comprising the following steps:

[0062] The first step: dissolving, dissolving the tungsten ore with potassium hydroxide solution (mass concentration is 30%) and filtering to remove precipitated impurities;

[0063] The second step: hydrolyzing and precipitating tungsten, adding sulfuric acid to the solution of the first step, the concentration of tungsten in the solution is 35g / L, the pH value is 2.0, the temperature value is 85°C, stirring and reacting for 60 minutes to hydrolyze and precipitate tungsten;

[0064] The third step: filtering, filtering the above solution to obtain tungsten hydrolyzate and acidic waste liquid;

[0065] The fourth step: secondary dissolution, adding deionized water to the tungsten hydrolyzate obtained in the third step, then adding potassium hydroxide solution (mass concentration is 35%), filtering to obtain a tungsten-containing solution, and continuing to the filtrate Add deionize...

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Abstract

The invention discloses a preparation method of high-purity tungsten trioxide. According to the method, firstly, tungsten is precipitated through hydrolysis; insoluble impurities are removed through the filtering under the acidic condition; then, obtained tungsten hydrolysate is added into a potassium hydroxide solution; precipitates are removed through filtering; next, a potassium carbonate solution is added; stirring is performed, and then, precipitates are removed through filtering; finally, a trace of polyvalent metal cation impurities are removed through cation exchange resin. The method has the advantages that the high-purity tungsten trioxide is obtained through preparation; the process is simple; the operation is easy; the technological flow process is shortened; the preparation cost is low; high economic benefits are realized; the problems of high production cost, product quality instability, great quantity of waste water in the production process and process complexity during the high-purity tungsten trioxide preparation in the prior art are solved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of tungsten trioxide preparation, in particular to a preparation method of high-purity tungsten trioxide. [0003] Background technique: [0004] Metal oxides have played a key role in the development of many advanced functional materials and smart devices. Among many metal oxides, tungsten trioxide is a unique material, which has attracted much attention due to its multifunctionality. Tungsten trioxide is an N-type semiconductor with a variety of crystal forms and a band gap of 2.5. -2.8eV, with visible light response characteristics. Therefore, tungsten trioxide can be used as photosensor devices, such as photochromic devices and transparent electrodes; at the same time, tungsten trioxide can also be used as a visible light photocatalyst to degrade organic pollutants and heavy metal ions in sewage by using photodynamics, which is environmentally friendly and economical ; In terms of indoor environ...

Claims

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Application Information

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IPC IPC(8): C01G41/02
CPCC01G41/003C01G41/02C01P2006/80
Inventor 付淑珍
Owner 江西翔鹭钨业有限公司
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