Promising method for selective separation of lanthanide(III) using synergistic extraction

共同効果を用いる特定ランタノイドの有用分離法

長谷川 裕子*; 玉城 沙也香*; 矢島 弘文*; 小林 徹 ; 矢板 毅

Hasegawa, Yuko*; Tamaki, Sayaka*; Yajima, Hirofumi*; Kobayashi, Toru; Yaita, Tsuyoshi

Synergistic extraction behaviour of lanthanide(III) (Ln(III)) with pivaloyltrifluoroacetone (HA) and N-methyl-N-phenyl-1,10-phenanthroline-2-carboxamide (MePhPA), tetraethylmethylene diphosphonate (POPO), 1-[2-[bis(2-ethylhexyl)-carbamoyl]ethyl] pyrrolidine-2-carboxylic acid (CEPA), 2,2-bipyridyl(bpy) or 2-pyridine aldoxime (PAOX) was examined across the Ln series. The extractability of Sm(III) with HA and these Lewis bases (B) was in the following sequence: MePhPA POPO CEPA bpy PAOX. From the detailed data-analysis, it was found that the dominant extracted species of Ln(III) was the ternary complex as LnAB.