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Study on the Preparation of Copper Sulfate by Copper Powder using Cation Membrane Electrowinning Prepared from Waste Cupric Chloride Solution

염화동 폐액으로부터 양이온격막 전해 채취된 구리 분말을 이용한 황산동의 제조방법 연구

  • Kang, Yong-Ho (Research & Development Center, Incheon Chemical Ltd.) ;
  • Hyun, Soong-Keun (Metals and Materials Process Engineering, Inha University)
  • 강용호 (인천화학 부설연구소) ;
  • 현승균 (인하대학교 금속재료공정학)
  • Received : 2018.12.19
  • Accepted : 2019.01.17
  • Published : 2019.02.28

Abstract

Generally, $H_2SO_4$ and Cu metal are used as raw materials for producing copper sulfate. The study relates to a method for producing copper sulfate using electrowinning from a waste solution of copper chloride. Uses are used for copper plating for industry, plating, feed, agriculture, electronic grade PCB. Conventional methods for producing copper sulfate have a problem of a large amount of waste water and a high energy cost. A study on the production method of copper sulfate ($CuSO_4$), which is the most used among copper (Cu) compounds, has a low process operation ratio, a small amount of waste water, and a simple manufacturing process. It is easy to remove Na, Ca, Mg, and Al as impurities by using a cationic membrane. At the same time, high purity copper powder could be recovered by an electrowinninng method. Using the recovered copper powder, high purity copper sulfate could be produced.

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Fig. 1. Schematic flow sheet for copper sulphate from waste acids.

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Fig. 2. New method for producing copper sulphate from waste acids.

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Fig. 3. Model concentration profile at the membrane-solution interface cation exchange membrane.

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Fig. 4. Producing copper power from electrowinning.

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Fig. 5. Cu concentration at 3.5 V electrowinning.

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Fig. 6. Ampere change at 3.5 V electrowinning.

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Fig. 7. Cu concentration at 4.5 V electrowinning.

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Fig. 8. Ampere change at 4.5 V electrowinning.

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Fig. 9. Cu concentration at 3.5 to 4.5 V electrowinning.

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Fig. 10. Ampere change at 3.5 to 4.5 V electrowinning.

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Fig. 11. producing copper sulfate from copper powder.

Table 1. Chemical composition of CuCl2

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Table 2. Experiment condition

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Table 3. Chemical composition of Cu powder

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Table 4. Chemical composition of Cu powder

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Table 5. Chemical composition of CuSO 4

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