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Method for recycling vanadium electrolytic solution

A technology of electrolyte recovery and electrolyte, which is applied in the field of vanadium batteries, can solve problems such as affecting use, increasing acid concentration, and deviation from normal values, and achieves the effects of prolonging the operating cycle, realizing recycling, and simple and easy operation

Active Publication Date: 2017-01-18
SICHUAN PAN YAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application can increase the vanadium concentration by heating and concentrating the electrolyte, but at the same time the acid concentration will also increase, which deviates from the normal value and affects the use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Take volume V 1 Be 5L high-valence vanadium battery cathode electrolyte, measure the total vanadium ion concentration C in the electrolyte with potentiometric titration 1 1.7mol / L, V 5+ Concentration C 11 1.0mol / L, sulfate radical SO 4 2- The concentration is 4.1mol / L. Target electrolyte volume V 2 11.5L, vanadium ion concentration C 2 1.7mol / L, sulfate concentration C S2 It is 4.1mol / L; according to the formula n 1 =(C 2 ×V 2 -C 1 ×V 1 ) / 2 to calculate the V that needs to be added 2 o 5 amount of substance n 1 is 5.5mol, add 5.5mol of V according to the calculation result 2 o 5 , that is, 1kg V 2 o 5 . Add excess H 2 C 2 o 4 , the reduction reaction temperature is 60 ° C, the solution turns blue after 8 hours of reaction, after the solution is filtered, the excess H is removed by heating 2 C 2 o 4 , the remaining solution volume V 1-2 It was 4.2L; VOSO in solution was measured by UV spectrophotometry 4 Concentration is 4.5mol / L, H 2 SO 4 Co...

example 2

[0026] Take volume V 1 Be 5L high-valence vanadium battery cathode electrolyte, record the total vanadium ion concentration C in the electrolyte with ultraviolet spectrophotometry 1 1.7mol / L, V 5+ Concentration C 11 1.0mol / L, sulfate radical SO 4 2- The concentration is 4.1mol / L. Target electrolyte volume V 2 11.5L, vanadium ion concentration C 2 1.7mol / L, sulfate concentration C S2 It is 4.1mol / L; according to the formula n 1 =(C 2 ×V 2 -C 1 ×V 1 ) / 2 to calculate the V that needs to be added 2 o 5 amount of substance n 1 is 5.5mol, add 5.5mol of V according to the calculation result 2 o 5 , that is, 1kg V 2 o 5 . Excess SO 2 gas, the reduction reaction temperature is 70 ° C, the solution turns blue after 8 hours of reaction, after the solution is filtered, the residual gas is removed by heating, and the remaining solution V 1-2 It is 5L; VOSO in the solution is measured by potentiometric titration method 4 Concentration is 3.8mol / L, H 2 SO 4 Concentrat...

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Abstract

The invention provides a method for recycling vanadium electrolytic solution. The method comprises the steps of determining the concentration of all-vanadium ion in the high valence vanadium positive electrolytic solution C1 and V<5+> concentration c11; adding V205, wherein the quantity of V205 substance n1 is determined by C1, V1, concentration of vanadium ion of target electrolyte solution C2 and volume V2; adding reductant to conduct reduction reaction; measuring the concentration of sulfate radical in the solution after reduction reaction CS1 and volume V1-2; adding vitriol, wherein the quantity of vitriol substance n2 is determined by CS1, V1-2, V2 and concentration of sulfate radical needed by target electrolyte solution; adding water into the solution after vitriol is added to obtain the target electrolyte solution with the volume V2. According to the method for recycling vanadium electrolytic solution, waste electrolyte solution can be recycled and treated in batches, recycling of the electrolytic solution is achieved, moreover, the method is simple to operate. The vanadium electrolytic solution can be treated nearby, and is beneficial to prolonging operational cycle of the vanadium battery.

Description

technical field [0001] The invention relates to the field of vanadium batteries, more specifically, relates to a method for recycling high-valent vanadium anode electrolyte. Background technique [0002] With the development of new energy sources, vanadium batteries have attracted wide attention as promising energy storage batteries. The vanadium battery electrolyte is an important part of the vanadium battery and is the energy carrier of the battery. The key to the energy storage of the vanadium battery lies in the electrolyte. During long-term operation, the positive and negative poles will not match, and the energy imbalance will cause the problem that it cannot continue to operate. Increased operating costs, with the development of the field of vanadium batteries, the recycling of waste electrolyte has become a concern of the vanadium battery industry. [0003] The Chinese patent "Vadium battery and its electrolyte rebalancing method" with the publication number CN10376...

Claims

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Application Information

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IPC IPC(8): H01M8/00H01M8/18
CPCH01M8/008H01M8/188Y02E60/50Y02W30/84
Inventor 曹敏彭穗汪南方刘波李道玉韩慧果陈勇陈婷
Owner SICHUAN PAN YAN TECH
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