Recovery of Lithium from Simulated Secondary Resources (LiCO 3 ) through Solvent Extraction

Pattamart Waengwan and Tippabust Eksangsri
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Pattamart Waengwan: Department of Chemical Engineering, Faculty of Engineering, Thammasat University, 99 Moo 8, Klong Nueng, Klong Luang, Pathumthani 12120, Thailand
Tippabust Eksangsri: Department of Chemical Engineering, Faculty of Engineering, Thammasat University, 99 Moo 8, Klong Nueng, Klong Luang, Pathumthani 12120, Thailand

Sustainability, 2020, vol. 12, issue 17, 1-13

Abstract: Lithium extraction is currently too inefficient to be economical or marketable. The objective of this work was to find the best extractant and the most inexpensive approach to recover lithium chemically from lithium ion batteries containing other desired metals using the solvent extraction technique. The extraction efficiency of various extracting types was investigated. The highest extraction efficiency of lithium ion from aqueous solution was obtained with bis(2-ethylhexyl) phosphate (DEHPA), with 75% recovery. Studying the effects of selected extractants in this experiment, it was found that the acidic extractant group provided better extraction efficiency than solvating extractants. Further investigation of influential variables was carried out, including extraction time, pH of aqueous solution, and initial concentration. The results indicate that 6 h of extraction brings the system to equilibrium, and pH 1.5 is the best for extraction efficiency.

Keywords: solvent extraction; acidic extractant; extraction efficiency; selectivity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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