Analytical Sciences

Abstract − Analytical Sciences, 23(12), 1427 (2007).

Extraction Behavior and Separation of Lanthanides with a Diglycol Amic Acid Derivative and a Nitrogen-donor Ligand
Kojiro SHIMOJO,* Hirochika NAGANAWA,* Junji NORO,** Fukiko KUBOTA,*** and Masahiro GOTO***
*Division of Environment and Radiation Sciences, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
**Research Department, NISSAN ARC, LTD., Yokosuka 237-0061, Japan
***Department of Applied Chemistry, Graduate School of Engineering and Center for Future Chemistry, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan
The extraction and separation of lanthanides have been investigated using CHON-type extractants, which are composed of only C, H, O, and N atoms. N,N-Dioctyldiglycol amic acid (DODGAA) showed high extraction and separation performances for heavier lanthanides compared with typical CHON-type extractants. On the other hand, N,N,N′,N′-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) provided an unprecedentedly high selectivity for lighter lanthanides. Furthermore, it was found that the combination of DODGAA and TPEN under suitable conditions enabled the mutual separation of light, middle, and heavy lanthanides.