|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Separation of Rare Earths Using Diglycolamide Extractants
||Bruce Moyer, Derek Brigham, Vyacheslav Bryantsev, Lętitia Delmau, Ross Ellis, Alexander Ivanov, Santa Jansone-Popova, R. Scott Herbst, Kevin Lyon, Mitchell Greenhalgh
|On-Site Speaker (Planned)
The Critical Materials Institute (CMI) funded by the US Department of Energy has been developing technologies toward reducing the supply risk for five rare earth elements (REEs). One of the technical grand challenges in this endeavor is the separation of REEs from one another, owing to the small differences between the ionic radii of the adjacent trivalent REE metal ions across the series and feeble ligand-field effects. The family of diglycolamide extractants, first developed for nuclear applications, has emerged as highly effective for REE separations with avoidance of acid-base consumption. Using traditional distribution methods augmented by EXAFS structural analysis and DFT and MD computational modeling, fundamental understanding of how these ligands bind and extract REEs with unusually strong selectivity among the light REEs has emerged. Process chemistry for carrying out REE separations has been developed and demonstrated in countercurrent mixer-settler flowsheet tests.
||Planned: At-meeting proceedings