The Effect of the Relative Content and Accumulation of the Competing Displacer Ion on the Efficiency of Separation of Rare-Earth Metals in Complex Formation Displacement Chromatography with the Use of Various Retaining Ions

摘要

The separation of rare-earth metals (REMs) by complex formation displacement chromatography with the use of various retaining ions (Cu, Ni, Zn, Co) and nitrile triacetate as an eluent was studied. In the series Ni, Zn, Co, the displacer concentration in the REM zone decreased, while the efficiency of separation increased, and the competing ion was accumulated in the system. With copper used as a retaining ion, the accumulation factor of the competing ion was absent, and the separation of REMs was more effective, in spite of a higher concentration of the competing ion in the zone of the elements to he separated.