Solvent Extraction Research and Development, Japan
Online ISSN : 2188-4765
Print ISSN : 1341-7215
ISSN-L : 1341-7215
Notes
Preliminary Study on Separation of Dy and Nd by Multi-Step Extraction Using TDdDGA
Yuji SASAKIYasutoshi BANKeisuke MORITAMasahiko MATSUMIYARyoma ONOHidenobu SHIROISHI
Author information
JOURNALS FREE ACCESS

2020 Volume 27 Issue 1 Pages 63-67

Details
Abstract

Mutual separation technique of Dy and Nd in Nd magnets is studied. Dy is more valuable than Nd, and therefore, Dy should be isolated and reused. Lanthanide elements can be extracted thoroughly by using diglycolamide (DGA) extractants, and we use this reagent to recover and isolate Dy. N,N,N',N'-TetradodecylDGA (TDdDGA) has a relatively high separation factor (SF) between Dy and Nd (SF: over 10) in the HNO3 extraction system, so multi-step extraction using TDdDGA is applied to mutually separate them. In the present study, by using the condition, four extraction steps, organic phase: 0.1 M TDdDGA in n-dodecane, aqueous phase: 0.3 M HNO3, 92 % Dy can be recovered with 0.7 % co-extraction of Nd.

Information related to the author
© 2020 Japan Association of Solvent Extraction
Previous article
feedback
Top