Publisher: John Wiley & Sons Inc
E-ISSN: 1521-3765|21|33|11757-11766
ISSN: 0947-6539
Source: CHEMISTRY - A EUROPEAN JOURNAL, Vol.21, Iss.33, 2015-08, pp. : 11757-11766
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Abstract
AbstractIn a conventional solvent extraction system, metal ions are distributed between two immiscible phases, typically an aqueous and an organic phase. In this paper, the proof‐of‐principle is given for the distribution of metal ions between three immiscible phases, two ionic liquid phases with an aqueous phase in between them. Three‐liquid‐phase solvent extraction allows separation of a mixture of three metal ions in a single step, whereas at least two steps are required to separate three metals in the case of two‐liquid‐phase solvent extraction. In the triphasic system, the lower organic phase is comprised of the ionic liquid betainium‐ or choline bis(trifluoromethylsulfonyl)imide, whereas the upper organic phase is comprised of the ionic liquid trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)imide. The triphasic system was used for the separation of a mixture of tin(II), yttrium(III), and scandium(III) ions.
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