Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Solvent Extraction of Co(II) and Cu(II) from Hydrochloric Acid Solution of Spent Lithium-ion Batteries Containing Li(I), Mn(II), and Ni(II)

Li(I), Mn(II) 및 Ni(II)를 함유한 폐리튬 이온 배터리의 염산침출용액에서 Co(II) 및 Cu(II)의 용매 추출

  • Le, Minh Nhan (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Lee, Man Seung (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University)
  • 르민난 (목포대학교 공과대학 신소재공학과) ;
  • 이만승 (목포대학교 공과대학 신소재공학과)
  • Received : 2020.10.05
  • Accepted : 2020.10.20
  • Published : 2020.10.30
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Abstract

In order to develop a process for the recovery of valuable metals from spent LiBs, solvent extraction experiments were performed to separate Cu(II) and/or Co(II) from synthetic hydrochloric acid solutions containing Li(I), Mn(II), and Ni(II). Commercial amines (Alamine 336 and Aliquat 336) were employed and the extraction behavior of the metals was investigated as a function of the concentration of HCl and extractants. The results indicate that HCl concentration affected remarkably the extraction efficiency of the metals. Only Cu(II) was selectively at 1 M HCl concentration, while both Co(II) and Cu(II) was extracted by the amines when HCl concentration was higher than 5 M, leaving the other metal ions in the raffinate. Therefore, it was possible to selectively extract either Cu(II) or Co(II)/Cu(II) by adjusting the HCl concentration.

폐리튬이온전지에 함유된 유가금속을 회수하기 위한 공정을 개발하기 위해 리튬(I), 망간(II), 니켈(II)을 함유한 합성 염산용액에서 구리(II)와 코발트(II)의 분리를 위한 용매추출실험을 수행했다. 본 연구에서는 Alamine 336과 Aliquat 336을 추출제로 사용했으며 염산과 추출제의 농도에 따른 금속의 추출거동을 조사했다. 염산농도가 금속의 추출거동에 큰 영향을 미치는 것이 확인되었다. 염산농도가 1 M인 조건에서는 구리(II)만 추출되었으나, 염산농도 5 M 이상의 조건에서는 구리(II)와 코발트(II)가 선택적으로 추출되고 리튬(I), 망간(II), 니켈(II)은 추출여액에 남았다. 염산농도를 조절하면 구리(II)와 코발트(II)를 선택적으로 추출하는 것이 가능하다.

Keywords

References

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