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To remove aluminum (Al) from rare earth element (REE) especially light rare earth element (LREE), octyl-phenoxy isopropionic acid (OPIPA) has been developed for the liquid-liquid extraction separation of Al from REE in this study. Using specific extraction experiment and infrared spectra analysis, the stoichiometry of saponified octyl-phenoxy isopropionic acid (S-OPIPA) to Al is indicated to be 3:1...
Recovery of secondary resources including waste SmCo magnets contributes to easing the natural resources and environmental issues. For the development of recovery technologies, an ionic liquid (IL)-based precipitation route based on [trihexyl(tetradecyl)phosphonium]2[benzene-1,4-dioxydiacetate] ([P6,6,6,14]2[BDOAC]) is presented. The slow release of [BDOAC]2− from [P6,6,6,14]2[BDOAC] increases the...
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