Effect of amide group and ether chain in diglycolamic acid-type extractants on extraction performance

Sugita, Tsuyoshi   ; Fujiwara, Iori*; Okamura, Hiroyuki   ; Oshima, Tatsuya*; Baba, Yoshinari*; Naganawa, Hirochika  ; Shimojo, Kojiro   

The extractant plays a key role in solvent extraction. Previous studies reveal that acidic extractant with tridentate structure, DGAA, has superior extraction performance for various metal ions. in this study, to investigate a effect of each functional group in DGAA-type extractant, we carried out are synthesis and evaluation of analogous extractants of DGAA. In the result, the secondary amide-type DGAA tended to provide better extraction for relatively small-sized metal ions than tertiary amide-type DGAA, and the thioether chain-type DGAA showed superior extraction ability for soft metal ions compared to ether chain-type DGAA.