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Method for cleanly removing copper ions in copper-bearing vanadium solution

A copper ion and vanadium ion technology, applied in fuel cells, regenerative fuel cells, electrical components, etc., can solve the problems of high process cost, high energy consumption, secondary pollution of the solution, etc., and achieve easy availability of raw materials, low energy consumption, The effect of reducing the cost of copper removal

Active Publication Date: 2015-06-03
辽宁科京新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for cleanly removing copper ions in a copper-vanadium-containing solution, so as to solve the disadvantages of large energy consumption, secondary pollution of the solution, and high process cost in the existing copper removal technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The copper ion content of the copper-vanadium battery electrolyte with a known vanadium ion concentration of 3 mol / L is about 2.2 g / L. Take 1000ml of electrolyte, feed 1.8 liters of reducing gas mixed with sulfur dioxide and hydrogen at a volume ratio of 1:1, convert the divalent copper ions in the solution into cuprous ions, then feed 0.8 liters of hydrogen sulfide, and the reaction temperature is 70 ℃, the reaction time is 3 hours, stir during the reaction, continue to stir for 2 hours after the reaction, let it stand for 24 hours, filter out the precipitate, measure the copper ion content of the solution by icp to 225mg / L, and the copper removal rate 89.77%.

Embodiment 2

[0022] The copper ion content of the copper-vanadium battery electrolyte with a known vanadium ion concentration of 3 mol / L is about 2.2 g / L. Take 1000ml of electrolyte solution, pass through 1.8 liters of reducing gas mixed with carbon monoxide and ozone at a volume ratio of 1:1, so that the divalent copper ions in the solution are converted into cuprous ions, and then pass through hydrogen sulfide and sulfur dioxide at a volume ratio of 1:1 The mixed gas is 0.8 liters, the reaction temperature is 70°C, and the reaction time is 2 hours. Stir during the reaction, continue to stir for 2 hours after the reaction is over, let stand for 24 hours, filter out the precipitate, and measure the copper in the solution icp The ion content is 300mg / L, and the copper removal rate is 86.36%.

Embodiment 3

[0024] The copper ion content of the known vanadium ion concentration of 2mol / L copper-vanadium battery electrolyte is about 2.2g / L. Take 1000ml of electrolyte, feed 1.8 liters of reducing gas mixed with sulfur dioxide and hydrogen at a volume ratio of 1:1, convert the divalent copper ions in the solution into cuprous ions, then feed 0.8 liters of hydrogen sulfide, and the reaction temperature is 70 ℃, the reaction time is 1 hour, stir during the reaction, continue to stir for 2 hours after the reaction, let it stand for 24 hours, filter out the precipitate, measure the copper ion content of the solution by icp to 260mg / L, and the copper removal rate 88.18%.

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Abstract

The invention relates to the field of battery application and energy recovery, and in particular relates to a method for cleanly removing copper ions in copper-bearing vanadium solution, solving the defects that the existing copper removal technology is large in energy consumption, has secondary pollution to the solution, is high in process cost, and the like. The method comprises the step: based on copper-bearing vanadium solution as a raw material, introducing enough and clean reducing gas and clean gas having selective precipitation to copper ions to directionally precipitate copper under certain reaction environment. According to the method, no other impurities are introduced, no catalysts are needed, the operation is easy, the raw materials are easily available, the copper removal rate can achieve more than 80%, and the copper removal effect is obvious. The electrochemistry reversibility of treated electrolyte is good, the conductivity is high and the recycling of batteries can be realized.

Description

technical field [0001] The invention relates to the field of battery application and energy recovery, in particular to a method for cleanly removing copper ions in a solution containing copper and vanadium. Background technique [0002] Vanadium redox flow battery, referred to as vanadium battery. It is a new type of electrochemical energy storage system. Compared with traditional storage batteries, it has the characteristics of fast charging and discharging, large capacity, low self-discharging rate and simple battery structure. It is suitable for large-scale storage of new energy such as wind energy and solar energy. ideal form of power supply. The positive and negative electrolytes of vanadium batteries contain VO 2+ / VO 2 + with V 2+ / V 3+ The sulfuric acid solution of the redox couple is not only a conductive medium, but also an electroactive material for energy storage, and is the core of vanadium battery energy storage and energy conversion. During the operatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/00H01M8/18
CPCY02E60/50
Inventor 秦野张博王丽娟何虹祥刘建国严川伟
Owner 辽宁科京新材料有限公司
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