Issue 18, 2024

Improved separation of rare earth elements using hydrophobic deep eutectic solvents: liquid–liquid extraction to selective dissolution

Abstract

Deep eutectic solvents (DESs) composed of a beta-diketone and phosphine oxides featuring different alkyl chain lengths were prepared and then employed as liquid–liquid extraction and dissolution media for the separation of iron, cobalt, neodymium, and dysprosium. In the dissolution the more sterically hindered DESs exhibited enhanced selectivity to neodymium, which was poorly separated using liquid–liquid extraction. The dissolution selectivity in less sterically hindered DESs could be controlled by the addition of organic acids with different alkyl chain lengths.

Graphical abstract: Improved separation of rare earth elements using hydrophobic deep eutectic solvents: liquid–liquid extraction to selective dissolution

Supplementary files

Article information

Article type
Communication
Submitted
04 3月 2024
Accepted
05 7月 2024
First published
11 7月 2024

Green Chem., 2024,26, 9671-9675

Improved separation of rare earth elements using hydrophobic deep eutectic solvents: liquid–liquid extraction to selective dissolution

T. Hanada, N. Schaeffer, M. Katoh, J. A. P. Coutinho and M. Goto, Green Chem., 2024, 26, 9671 DOI: 10.1039/D4GC01089B

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