Gh. Van Bochove et al., Modelling of liquid-liquid equilibria of mixed solvent electrolyte systemsusing the extended electrolyte NRTL, FLU PH EQUI, 171(1-2), 2000, pp. 45-58
Liquid-liquid equilibria of mixed solvent electrolyte systems were correlat
ed using an extended electrolyte NRTL model. The electrolyte NRTL expressio
n for the activity coefficients has been modified by taking into account th
e derivatives to the solvent composition of the physical properties and by
a new Bronsted-Guggenheim (BG) expression. In addition to some ternary mixe
d solvent electrolyte systems, the model has been applied to the quaternary
systems that are of importance in the extraction process of epsilon-caprol
actam: water + epsilon-caprolactam + solvent + ammonium sulfate (AS), The L
iquid-liquid equilibria of the ternary and quaternary systems involved and
the mean activity coefficients of the salt + water systems were used simult
aneously to obtain the adjustable parameters. The results are compared to t
he original electrolyte NRTL of Chen. (C) 2000 Elsevier Science B.V. All ri
ghts reserved.