Salting out potential of cholinium dihydrogen citrate in aqueous solution of Triton surfactants

Aqueous solutions of the non-ionic surfactants Triton X-100 and Triton X-102 have been salted out with the biocompatible ionic liquid cholinium dihydrogencitrate (N1112OHDHC). The phase boundary for {Triton X-100 or Triton X-102 + N1112OHDHC + H2O} was ascertained at T = ( 293.15, 303.15, 313.15 and 323.15) K and 0.1 MPa. The binodal data were modelled by one polynomial and three exponential equations, and the tie-line data were suitably correlated by means of Othmer-Tobias, Bancroft and Setschenow empirical models. The experimental results allowed concluding that the increase of temperature and the hydrophobicity of the surfactant led to the shift of the binodal curve to the water vertex. (C) 2017 Elsevier Ltd.