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http://dx.doi.org/10.7844/kirr.2020.29.5.73

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)  

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)
Publication Information
Resources Recycling / v.29, no.5, 2020 , pp. 73-80 More about this Journal
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.
Keywords
spent lithium-ion batteries; hydrochloric acid; solvent extraction; amines;
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