Mutual separation of lanthanides by multi-stage extraction using TODGA

Sasaki, Yuji  ; Matsumiya, Masahiko*

DGA (diglycolamide) compounds can extract lanthanide (Ln) elements in nitric acid and shows the high D(Ln). The separation factors (SF) between light and heavy Ln are relatively high, thus the mutual separation of Ln can be easily done by DGA compounds. On the other hand, their SF is not so high, the separation and recovery between Nd and Dy are performed using batchwise multi-step extraction. In this work, calculation results are compared with the experiments, and its effect is confirmed.