Ionic-Liquid-Based Acidic Aqueous Biphasic Systems for Simultaneous Leaching and Extraction of Metallic Ions

abstract

The first instance of an acidic aqueous biphasic system (AcABS) based on tributyltetradecyl phosphonium chloride ([P-44414][Cl]) and an acid is here reported. This AcABS exhibits pronounced thermomorphic behavior and is shown to be applicable to the extraction of metal ions from concentrated acidic solutions. Metal ions such as cobalt(II), iron(III), platinum(IV) and nickel(II) are found to partition preferentially to one of the phases of the acidic aqueous biphasic system and it is here shown that it successfully allows the difficult separation of Co-II from Ni-II, here studied at 24 and 508 degrees C.

keywords

SEPARATION; WATER; GOLD; PRECIPITATION; SOLUBILITIES; IMIDAZOLIUM; PD(II)

subject category

Chemistry

authors

Gras, M; Papaiconomou, N; Schaeffer, N; Chainet, E; Tedjar, F; Coutinho, JAP; Billard, I

our authors

acknowledgements

This work was part of BATRE-ARES project funded by ADEME and FCT. M. Gras would like to acknowledge labex CEMAM and EIT InnoEnergy H2020 for financial support. This work was partly developed in the scope of the project CICECO, Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013).

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