Study on Separation of Lanthanum from Praseodymium Complexes with IMDA by Gel and Macroporous Anion-Exchangers

摘要

During our studies on separation of rare earth complexes with aminopolycarboxylic acids on anion - exchangers, it is found that the affinity series of these elements with IMDA (Ln~3+:IMDA=1:2) for the anion - exchanger Dowex 1 in the acetate and IMBED forms is non - typical: Dy~3+>Ho~3+>Gd~3+>Eu~3+>Er~3+>Y~3+>Sm~3+>Tm~3+>Nd~3+Pr~3+> >La~3+. In the affinity series La~3+ is characterized as the lowest affinity in comparison with other rare earth elements, which indicates possibility of purification of La~3+ from all remaining lanthanides as well as Pr~3+ in the macro - micro systems by the frontal analysis technique.