STUDIES ON SELECTIVE SEPARATION OF SC(III) FROM RARE-EARTH ELEMENTS ON SELECTIVE ION-EXCHANGERS

Results of studies on the separation of microquantities of scandium(III) from macroquantities of rare earth elements, as well as some transition and representative elements, on selective ion-exchangers of different types are given. The most effective ion-exchangers for the purification of rare earth elements from Sc(III) by frontal analysis are: phosphonic - Duolite ES-63, (Dia - Prosim France), aminophosphonic - Duolite ES-467 (Dia - Prosim France) and cellulose phosphate - Serva P (Serva F.R.G.). Using these ion-exchanger, Sc(III) can be selectively separated from Y(III), La(III) or Ln(III) from their salt solutions of concentrations up to 500 g/l and acidity to 6 M HCl. © 1990.