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

Publié dans Angewandte Chemie International Edition.

Mis à jour le 2 décembre 2019
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Par Matthieu Gras, Dr. Nicolas Papaiconomou, Dr. Nicolas Schaeffer, Dr. Eric Chainet, Dr. Farouk Tedjar, Prof. Joao A. P. Coutinho & Dr. Isabelle Billard

The first instance of an acidic aqueous biphasic system (AcABS) based on tributyltetradecyl phosphonium chloride ([P44414][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 CoII from NiII, here studied at 24 and 50 °C.

Full paper : DOI:10.1002/anie.201711068
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mise à jour le 2 décembre 2019

Univ. Grenoble Alpes