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A Triple Salting‐Out Effect is Required for the Formation of Ionic‐Liquid‐Based Aqueous Multiphase Systems
Author(s) -
Passos Helena,
Costa Sara H.,
Fernandes Ana M.,
Freire Mara G.,
Rogers Robin D.,
Coutinho João A. P.
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201705704
Subject(s) - ionic liquid , aqueous solution , salting out , chemistry , polymer , aqueous two phase system , ionic bonding , chemical engineering , phase (matter) , polymer chemistry , inorganic chemistry , organic chemistry , ion , engineering , catalysis
Novel aqueous multiphase systems (MuPSs) formed by quaternary mixtures composed of cholinium‐based ionic liquids (ILs), polymers, inorganic salts, and water are reported herein. The influence of several ILs, polymers, and salts was studied, demonstrating that a triple salting‐out is a required phenomenon to prepare MuPSs. The respective phase diagrams and “tie‐surfaces” were determined, followed by the evaluation of the effect of temperature. Finally, the remarkable ability of IL‐based MuPSs to selectively separate mixtures of textile dyes is shown.