論文

査読有り 筆頭著者 責任著者
2020年1月

Synergistic Enhancement of the Extraction and Separation Efficiencies of Lanthanoid(III) Ions by the Formation of Charged Adducts in an Ionic Liquid

Industrial & Engineering Chemistry Research
  • Hiroyuki Okamura
  • ,
  • Masayoshi Mizuno
  • ,
  • Naoki Hirayama
  • ,
  • Kojiro Shimojo
  • ,
  • Hirochika Naganawa
  • ,
  • Hisanori Imura

59
1
開始ページ
329
終了ページ
340
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.iecr.9b04998
出版者・発行元
AMER CHEMICAL SOC

The synergistic ionic-liquid extraction and extraction equilibrium of lanthanoid(III) (Ln(III)) ions have been investigated using 2-thenoyltrifluoroacetone (Htta) and trioctylphosphine oxide (TOPO) in the ionic liquid 1-butyl-3 methylimidazolium bis(trifluoromethanesulfonyl)imide ([C(4)mim][Tf2N]). The selective synergistic effect for heavier Ln(III) ions was found using a combination of Htta and TOPO in [C(4)mim] [Tf2N], leading to enhanced separability among Ln(III) ions. The extracted Ln(III) species and the extraction constants in the Htta-TOPO system were determined by three-dimensional extraction equilibrium analysis. In this system, the neutral adduct, Ln(tta)(3)(TOPO)(2), and the cationic charged adducts, Ln(tta)(2)(TOPO)(2)(+), Ln(tta)(2)(TOPO)(3)(+), and Ln(tta)(TOPO)(3)(2+), were extracted into the [C(4)mim][Tf2N] phase. The adduct formation constants in [C(4)mim][Tf2N] were determined to evaluate the synergistic effect of Htta and TOPO on the extraction of Ln(III) ions. The selective synergism for heavier Ln(III) ions in the Htta-TOPO system was ascribed to the formation of hydrophobic, charged adducts, such as Ln(tta)(2)(TOPO)(3)(+) and Ln(tta)(TOPO)(3)(2+), in [C(4)mim][Tf2N].

リンク情報
DOI
https://doi.org/10.1021/acs.iecr.9b04998
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000507144500034&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/acs.iecr.9b04998
  • ISSN : 0888-5885
  • Web of Science ID : WOS:000507144500034

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