Recovery of Lithium from Simulated Secondary Resources (LiCO3) through Solvent Extraction

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.

A green closed-loop process for selective recycling of lithium from spent lithium-ion batteries

“…In this process, lithium is usually extracted last in the solution. Waengwan et al 23 recycled 75% of lithium at the end of the hydrometallurgy process by solvent extraction. Lv et al 24 reported a similar study with a recovery rate of 91.23% for lithium.…”

Reviewing Advanced Treatment of Hydrocarbon-Contaminated Oilfield-Produced Water with Recovery of Lithium

“…The method that used sodium bicarbonate instead of hydrochloric acid for lithium stripping achieved a 99.87% efficiency after five stages, demonstrating system stability and a consistent extraction efficiency of 84% for Li + [85]. Moreover, Waengwan et al [86] investigated the lithium-extracting efficacy of several extracting agents (n-butanol, tri octylamine (TOA), 4-methyl-2-pentanol (MIBC), bis(2-ethylhexyl) phosphate (DEHPA), and tri octyl phosphine oxide (TOPO) from synthetic battery solution. Distilled water and HCl were used to produce a 10 mg/L solution of lithium carbonate and cobalt carbonate in the synthetic battery solution, respectively.…”

Overview of Recycling Techniques for Lithium-Ion Batteries

“…This, in turn, would facilitate more precise sorting, for the best suitable hydrometallurgical recycling method tailored to the specific active materials, reducing losses in the recycling process. [25][26][27]…”