Abstract
Interphase distribution of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y between aqueous HCl solutions and solutions of carbamoylmethylphosphine oxides in the presence of binary extractants, quaternary ammonium dinonylnaphthalenesulfonates, has been studied. It has been shown that the efficiency of extraction of rare earth elements(III) (REE) with carbamoylmethylphosphine oxides increases considerably in the presence of binary extractant in organic phase. The stoichiometry of extracted complexes has been determined, effect of cation nature of the binary extractant, organic solvent, structure of carbamoylmethylphosphine oxides, and HCl concentration in aqueous phase on efficiency of REE(III) recovery into organic phase has been considered.
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