Mutual separation of Dy and Nd by multi-stage extraction using DGA compound

Sasaki, Yuji  ; Ban, Yasutoshi  ; Morita, Keisuke ; Matsumiya, Masahiko*; Ono, Ryoma*; Shiroishi, Hidenobu*

Mutual separation technique of Dy and Nd in Nd magnet is noticed for the recycle of ranthanide elements. Both Dy and Nd belong to ranthanide elements, then the mutual separation is very hard. Lanthanide elements can be extracted thoroughly by diglycolamide (DGA) extractants, we use this reagent for the recovery and isolation of Dy. Tetradodecyl-DGA (TDdDGA) has relatively high separation factors (SF) between light and heavy ranthanides, this compound is useful for this purpose. In this work, the counter-current extraction using TDdDGA was applied for their separation, and the results will be discussed.