Ionic Liquid Synergistic Cation-Exchange System for the Selective Extraction of Lanthanum(III) Using 2-Thenoyltrifluoroacetone and 18-Crown-6 | Zendy

Naoki Hirayama | Zendy; Hiroyuki Okamura | Zendy; Keiji Kidani | Zendy; Hisanori Imura | Zendy

Open Access

Ionic Liquid Synergistic Cation-Exchange System for the Selective Extraction of Lanthanum(III) Using 2-Thenoyltrifluoroacetone and 18-Crown-6

Author(s) -

Naoki Hirayama,

Hiroyuki Okamura,

Keiji Kidani,

Hisanori Imura

Publication year - 2008

Publication title -

analytical sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.392

H-Index - 73

eISSN - 1348-2246

pISSN - 0910-6340

DOI - 10.2116/analsci.24.697

Subject(s) - thenoyltrifluoroacetone , chemistry , lanthanum , lanthanide , europium , ionic liquid , extraction (chemistry) , lutetium , cationic polymerization , inorganic chemistry , ternary operation , solvent , ionic radius , nuclear chemistry , solvent extraction , chromatography , organic chemistry , ion , yttrium , catalysis , oxide , computer science , programming language

A novel synergistic extraction system was investigated for the possible selective separation of light lanthanoids using an ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, as an extraction solvent and 2-thenoyltrifluoroacetone and 18-crown-6 as extractants. Trivalent lanthanum was efficiently extracted as a cationic ternary complex by the cation-exchange process, whereas europium and lutetium showed relatively low extractability without forming respective ternary complexes. This result is thought to originate in a size-fitting effect of 18-crown-6 to lanthanum and the unique nature of the ionic liquid as a chelate extraction solvent.

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