VLE and LLE calculations for binary and ternary mixtures of associating solvents and electrolytes using the SAFT-VR EOS

An equation of state based on the statistical associating fluid theory for potentials of variable range (SAFT-VR) which has previously been tested for single solvent systems has been used to model vapor-liquid and liquid-liquid equilibria (VLE and LLE, respectively) in mixtures of hydrogen-bonding solvents with or without electrolytes. The salting-out effect of the organic solvents and salt induced instability are studied and modeled using pure component parameters and binary interaction coefficients from a previous work combined with additional parameters which have been fitted to experimental data for the systems of interest. The model reproduces the correct qualitative and quantitative phase behavior of the studied systems.