Modeling vapor-liquid-liquid-solid equilibrium for acetone-water-salt system

A compilation of available experimental data for acetone-water mixtures with the reciprocal salt system Na+, K+parallel to Cl+, SO42- is presented. Significant inconsistencies among experimental data are pointed out. New freezing point measurements are reported for the binary acetone-water system at 12 different compositions. UNIQUAC parameters are determined on the basis of the available data from literature. Modeling results are presented. Vapor-liquid, liquid-liquid, and solid-liquid equilibria together with thermal properties are reproduced well by the model using only 14 parameters. The major drawback of the model is that the calculated liquid-liquid equilibrium regions of systems with KCl and NaCl are larger than the experimentally determined regions. The model is valid in the temperature range from -16 to 100 degrees C.