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Vanadium trioxide and preparation method thereof

A technology of vanadium trioxide and tetravalent vanadium, applied in vanadium oxide and other directions, can solve the problems of difficult operation conditions, high equipment requirements, unfavorable environmental protection and the like, and achieve the effects of easy implementation, simple operation and mild conditions

Inactive Publication Date: 2018-08-21
四川星明能源环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for extraction and separation of pure vanadic acid (Van) solutions into different components like vanadyl oxides or other compounds that have important applications such as catalysts used in chemical reactions. By adjusting these parameters carefully, this method results in highly-pure vanadia with fewer impurities compared to current methods. Additionally, it simplifies the overall production processes while reducing power usage during operation.

Problems solved by technology

This patented technical problem addressed by this patents relates to finding an efficient process for producing pure vanadic oxides (Vanadium) that can be used without generating harmful chemical waste during production processes.

Method used

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  • Vanadium trioxide and preparation method thereof

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preparation example Construction

[0014] see figure 1 , a preparation method of vanadium trioxide, specifically, comprising the following steps:

[0015] S1, pretreatment;

[0016] The raw material for preparing vanadium trioxide provided in the embodiment of the present invention is a vanadium solution containing pentavalent vanadium, so it is necessary to react the vanadium solution containing pentavalent vanadium with a reducing agent to obtain a tetravalent vanadium solution. The reducing agent used is one or more of sodium sulfite, sulfur dioxide, iron powder or oxalic acid.

[0017] In the embodiment of the present invention, it is determined whether all the vanadium at the pentavalent position is reduced to tetravalent vanadium through the potentiometric titration method of detecting the discharge-treated solution. For specific detection methods, please refer to "Potentiometric Titration Analysis of Vanadium Battery Electrolyte; Tian Bo, Yan Chuanwei, etc.; Testing and Analysis; 2003, Volume 33, Issue...

Embodiment 1

[0040] A preparation method of vanadium trioxide, comprising the following steps:

[0041] S1, pretreatment;

[0042] Take 100mL of vanadium solution containing pentavalent vanadium, add a reducing agent under stirring conditions, and determine whether all low-priced vanadium is oxidized to tetravalent vanadium by detecting the potentiometric titration of the discharge-treated solution; the reducing agent is sodium sulfite.

[0043] S2, extraction;

[0044] With 500mL mixed extraction agent (kerosene containing 0.3mol / L P204 and 0.2mol / L TBP), join in the tetravalent vanadium solution (500mL), carry out the first primary extraction, extraction agent is compared with leachate (O / A) is 1:1, shake for 5 minutes, stand still to separate the liquid to obtain the extract (organic phase) and the raffinate.

[0045]The organic phase is back-extracted, and 1.5mol / L sulfuric acid is used for eluting, and 100mL1.5mol / L sulfuric acid is added to 500mL of the organic phase for the first...

Embodiment 2

[0057] This embodiment provides a preparation method of vanadium trioxide, which is basically the same as the preparation method in Example 1, except that the operating conditions are changed. Reducing agent is sulfur dioxide, and the concentration of two (2-ethylhexyl) phosphoric acid esters is 0.1mol / L in the mixed extractant, and the concentration of tributyl phosphate is 0.15mol / L, and the number of extractions is 4 times, and the comparison of extraction ( O / A) 2:1, the extraction time is 2 minutes, and the ratio (O / A) is 1:1 during the stripping process.

[0058] The pH of the tetravalent vanadium solution was adjusted to 7.5 with aqueous ammonia. During the adjustment process, ammonia water was added at a rate of 24 drops / minute, and the pH value of the tetravalent vanadium solution to which ammonia water was added was detected in real time. The concentration of tetravalent vanadium hydrate in the mixed solution is 150g / L. Wash 3 times with deionized water.

[0059] ...

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Abstract

The invention relates to the field of material preparation and in particular relates to vanadium trioxide and a preparation method thereof. The preparation method of the vanadium trioxide comprises the following steps: adjusting the pH value of an extracted tetravalent vanadium solution to 7-7.5, and calcining in an environment in the presence of a mixed gas atmosphere at 900-1050 DEG C for 0.5-1.5 hours, thereby obtaining the vanadium trioxide. The method is simple to operate and short in reaction time, and high-purity vanadium trioxide can be rapidly prepared.

Description

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Claims

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Application Information

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Owner 四川星明能源环保科技有限公司
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