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Method for removing copper ions from copper-containing vanadium liquid

A copper ion and solution technology, applied in the disposal/recycling of fuel cells, fuel cells, electrical components, etc., to achieve the effects of less environmental pollution, stable properties, and reduced risk of secondary pollution

Active Publication Date: 2015-04-29
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 removing copper ions in a copper-vanadium-containing solution, so as to solve the problems of the existing copper-containing electrolyte reuse and recovery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 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, the reducing agent is 1g of formic acid, 0.5g of glycerin, 2g of sodium pyrosulfate and 1g of sodium sulfite, the copper removing agent is 2g of sodium sulfide and 1.5g of sulfur powder, the reaction temperature is 80°C, and stirring is carried out during the reaction. Continue to stir for 2 hours after the reaction, let stand for 24 hours, filter out the precipitate, and measure the copper ion content in the solution by icp to 155mg / L, and the copper removal rate is 92.95%.

Embodiment 2

[0025] The copper ion content of the known vanadium ion concentration is 3mol / L copper-vanadium battery electrolyte is about 2.2g / L. Take 1000ml electrolyte, the reducing agent is ethylene 1g, glycerin 0.5g, sodium pyrosulfate 2g and sodium sulfite 1g; the copper removing agent is sodium sulfide 1g, sulfur powder 1g, sodium hydrosulfide 1g and sodium thiocyanide 1g, the reaction temperature is 60 ℃, stirred during the reaction, continued to stir for 1 hour after the reaction, stood still for 28 hours, filtered out the precipitate, and measured the copper ion content of the solution by icp to 45mg / L, and the copper removal rate was 97.95%.

Embodiment 3

[0027] The copper ion content of the known vanadium ion concentration of 2mol / L copper-vanadium battery electrolyte is about 2.2g / L. Take 1000ml electrolyte, the reducing agent is oxalic acid 1g, formaldehyde 1g, sodium pyrosulfate 1.5g and sodium sulfite 1g; the copper removal agent is potassium sulfide 1g, sulfur powder 1g, potassium hydrosulfide 1g and potassium thiocyanide 0.5g, the reaction temperature is Stir at 100°C during the reaction, continue to stir for 3 hours after the reaction, let stand for 32 hours, filter out the precipitate, measure the copper ion content of the solution by icp to 0.3g / L, and the copper removal rate is 86.36%.

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Abstract

The invention relates to the field of battery application and energy recovery and particularly relates to a method for removing copper ions from copper-containing vanadium liquid. The method is used for solving problems in the reutilization, recovery and the like of a copper-containing electrolyte in the prior art. According to the method, a vanadium battery electrolyte which is used for a long time and contains the copper ions is taken as a raw material, an organic-inorganic reducing agent and a decoppering agent are added in a proper proportion within a certain temperature range, and then, the copper ions are removed from the liquid. The method for removing the copper ions from the copper-containing vanadium liquid has the advantages that the process method is simple, the operation is easy, the raw material is easily available, the copper removal ratio is above 85%, and the copper removal effect is remarkable.

Description

technical field [0001] The invention relates to the fields of battery application and energy recovery, in particular to a method for 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 operation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/00H01M8/008
Inventor 秦野张博何虹祥王利娟刘建国严川伟
Owner 辽宁科京新材料有限公司
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