Extraction Behaviors of Heavy Rare Earths with Organophosphoric Extractants: The Contribution of Extractant Dimer Dissociation, Acid Ionization, and Complexation. A Quantum Chemistry Study.
作者： Yu Jing , Ji Chen , Li Chen , Wenrou Su , Yu Liu
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摘要: Heavy rare earths (HREs), namely Ho3+, Er3+, Tm3+, Yb3+ and Lu3+, are rarer more exceptional than light earths, due to the stronger extraction capacity for 100 000 extractions. Therefore, their incomplete stripping high acidity of become problems HRE separation by organophosphoric extractants. However, theories extractant structure–performance relationship molecular design method novel extractants still not perfect. Beyond coordination chemistry HRE-extracted complex, dimer dissociation, acid ionization, complexation behaviors can be crucial reactivity ionic species understanding further improving performance. To address above issues, three primary fundamental processes, including complexation, were identified investigated systematically. The intrinsic performances cations with four acidic organophos...
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