Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 6, Pages 1563-1566Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201711068
Keywords
hydrometallurgy; ionic liquids; metal recycling; noble metals; sustainable chemistry
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Funding
- ADEME
- FCT
- labex CEMAM
- EIT InnoEnergy H
- project CICECO, Aveiro Institute of Materials (FCT) [POCI-01-0145-FEDER-007679, UID/CTM/50011/2013]
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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.
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