Method for preparing vanadyl sulfate

A technology of vanadyl sulfate and sulfuric acid, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of difficulty in controlling the quality of vanadium trioxide, being unsuitable for large-scale production, and difficult to guarantee product quality, and achieving advancement Commercial application process, no equipment investment, easy process control effect

Inactive Publication Date: 2009-12-30
DALIAN RONGKE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the quality of vanadium trioxide is difficult to control and the product quality is difficult to guarantee
There is also a process of electrolyzi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In 50 milliliters of deionized water, add 8.2 milliliters (0.15mol) mass concentration and be 98% concentrated sulfuric acid, be mixed with the dilute sulfuric acid that mass concentration is 23%, add 18.2 grams (0.1mol) vanadium pentoxide again, stir 30 minutes; Add 6.5 grams (0.05mol) of hydrazine sulfate and stir for 30 minutes to obtain a blue vanadyl sulfate solution. The above vanadyl sulfate solution is then evaporated, concentrated, crystallized, and recrystallized to prepare blue sulfuric acid. vanadyl crystals. The obtained sample was analyzed by thermogravimetric analysis, and the water content was 29.8%, and the tetravalent vanadium accounted for 99.0% of the total vanadium by potentiometric titration analysis.

Embodiment 2

[0024] In 50 milliliters of deionized water, add 5.9 milliliters (0.1mol) of mass concentration and be 92% concentrated sulfuric acid, be mixed with the dilute sulfuric acid that mass concentration is 17.9%, add 18.2 grams (0.1mol) vanadium pentoxide again, stir 60 minutes; Add 16.4 g (0.1 mol) of hydroxylamine sulfate and stir for 60 minutes to obtain a blue vanadyl sulfate solution, then evaporate, concentrate, crystallize, and recrystallize to prepare blue vanadyl sulfate crystals. The obtained sample was analyzed by thermogravimetric analysis, and the water content was 27.4%, and the tetravalent vanadium accounted for 99.5% of the total vanadium by potentiometric titration analysis.

Embodiment 3

[0026] In 40 milliliters of deionized water, add 24.5 milliliters (0.45mol) mass concentration and be 98% concentrated sulfuric acid, be mixed with the dilute sulfuric acid that mass concentration is 52.9%, add 18.2 grams (0.1mol) vanadium pentoxide again, stir 1 hour; Add 6.5 grams (0.05mol) of hydrazine sulfate, dilute to 100 milliliters, and stir for 2 hours to obtain a blue vanadyl sulfate solution (2mol / L VOSO 4 +3mol / L H 2 SO 4 ) The solution obtained can be directly used as the electrolyte of the all-vanadium redox flow battery.

[0027] The above vanadyl sulfate solution is evaporated, concentrated, crystallized and recrystallized to prepare blue vanadyl sulfate crystals.

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PUM

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Abstract

The invention discloses a method for preparing vanadyl sulfate. The process of the method mainly comprises: a) adding vanadium pentoxide to sulfuric acid; b) adding hydrazine or hydroxylamine; and c) performing evaporation and crystallization to obtain blue VOSO. xH2O crystals. Compared with the prior process route, the process route of the invention reduces the steps of heating, dissolving, cooling, diluting, electrolyzing and the like. The method has the advantages of mild reaction conditions, simple process, low cost, and stable product quality.

Description

technical field [0001] The present invention relates to vanadyl sulfate, specifically a kind of preparation method of vanadyl sulfate. Background technique [0002] Electric energy is difficult to store and indispensable. Its production must meet the demand for electricity at any time. Therefore, people have been looking for economical and feasible energy storage technologies to solve the contradiction between supply and demand and decouple the production of electric energy from demand. In addition, electric energy storage plays an important role in electric energy management, grid auxiliary services, voltage control, renewable energy utilization, and large-scale uninterruptible power supplies. If combined with large-scale thermal power generation, it can reduce the peak capacity of power stations, reduce power generation costs, and reduce pollution. If it is combined with renewable energy such as wind power and tidal energy, it can realize continuous and stable power supply...

Claims

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Application Information

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IPC IPC(8): C01G31/00
Inventor 张华民
Owner DALIAN RONGKE POWER
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