Effects of Polar Organic Solvent on Separation of Y(edta) ~- /Nd(edta) ~- Complexes on Polyacrylic Anion Exchangers

摘要

The use of polar organic solvents for the separations of rare earth elements (III) is effective especially for their extensive separations despite the solubility limitations. The study shows that polyacrylate anion exchangers, particularly the weakly basic, gel anion exchanger Amberlite IRA 68, can be applied to the separation of rare earth complexes with EDTA in H_2O-methanol and H_2O-ethanol systems. In most cases the determined distribution coefficients of Ln~(3+) complexes with EDTA in mixed media like water-methanol on polyacrylate anion exchangers are larger than those in pure water media.