Solvent Extraction of Eu(III) and Am(III) with Thio and Amide Extractants
Extraction studies of trivalent f-elements are reported for two thio donor ligands and for a diamide. The systems studied were tributylphosphate (TBP) + thiothenoyltrifluoracetone (HSTTA), triisobutyl phosphine sulfide (TiBPS) + thenoyltrifluoracetone (HTTA) and N,N′-dimethyl-N,N′-dihexyl-3-oxapentanediamide + HTTA. HSTTA and TiBPS were found to be much weaker extractants than the oxo analogs HTTA and TBP. Moreover, these soft donor ligands show little enhancement in Eu/An separation. A number of species were observed in the diamide extraction. The largest separation factor (α = 10) was obtained for the extraction of the M(TTA)(DMDHOPDA)(ClO4)2 species.
KeywordsSeparation Factor Extraction Constant Thionyl Chloride Hydration Number Ether Oxygen
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