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

Author

Takafumi Hanada, Schaeffer, Nicolas, Masahiro Katoh, Coutinho, Joao A. P., and Masahiro Goto

Subjects
RARE earth metals, LIQUID-liquid extraction, SOLVENT extraction, RARE earth oxides, PHOSPHINE oxides, DYSPROSIUM, ORGANIC acids
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. [ABSTRACT FROM AUTHOR]

Published
2024
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