Efficient separation of phenols from oils via forming deep eutectic solventsElectronic supplementary information (ESI) available: Characterization of the compounds by NMR spectra, IR spectra in detail. See DOI: 10.1039/c2gc35400d

Ammonium salts have been used to efficiently separate phenols from oils (where hexane, toluene and p -xylene were used as model oils) by forming a deep eutectic solvent, which is a nonaqueous process and avoids the use of mineral alkalis and acids that produces phenol containing waste water. Choline chloride (ChCl) has been used to efficiently separate phenols from oils by forming deep eutectic solvents (DES), which is a nonaqueous process and avoids the use of mineral alkalis and acids that produces phenol containing waste water.