Refine your search�ソスF     
Report No.
 - 

Synergistic ionic-liquid extraction for the selective separation of lanthanoids(III)

Okamura, Hiroyuki   ; Mizuno, Masayoshi*; Hirayama, Naoki*; Shimojo, Kojiro   ; Naganawa, Hirochika  ; Imura, Hisanori*

Ionic liquids have been widely investigated as novel functional extraction media in solvent extraction. We have investigated the synergistic ionic-liquid extraction of lanthanoids(III) (Ln(III)), and revealed that the synergistic effect is effective for the selective separation of Ln(III). In this study, the synergistic ionic-liquid extraction of Ln(III) with 2-thenoyltrifluoroacetone and trioctylphosphine oxide in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide was investigated to evaluate the synergistic effect. In the ionic liquid system, the synergistic effect on selective extraction for heavier Ln(III) was observed in contrast to the conventional organic solvent systems. The slope analysis indicated that the neutral adduct and the cationic ternary complexes are extracted. The adduct formation constant of the cationic ternary complex increased with an increase in the atomic number. These results indicate that the formation of hydrophobic charged ternary complexes is a main factor for the selective synergistic effect toward heavier Ln(III).

Accesses

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.