A New Extraction Chromatography Resin Containing Klaui Ligands for Application in Actinide Separations

摘要

An extraction chromatography resin containing the anionic ligand(eta~5-pentamethylcyclopentadienyl)fn's-(diethylphosphito-P)cobalt(III),Cp~* Co[P(O)(OEt)_2F(1Et)has been prepared.The resin consists of 1 wt% lEt on Amberlite XAD-7.This resin strongly sorbs Am~(3+)and Pu~(4+).The sorption of these ions decreases with increasing nitric acid concentration,but this effect is more pronounced for Am~(3+).This allows for convenient separation of Am~(3+)from Pu~(4+)by simple adjustments in the HNO3 concentration.The tripodal geometry of lEt disfavors the complexation of UO_2~(2+),so sorption of U(VI)by the 1Et-containing resin is weak. An analogous resin containing Cp ~*Co[P(O)(OPr)_2]_3- (IPr)shows similar Pu~(4+)sorption behavior.