Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Vapor-liquid equilibrium data for the systems 2-propanol+ water + calcium chloride, 2-propanol+ water + magnesium chloride, 2-propanol+ water + calcium nitrate and 2-propanol+ water + magnesium nitrate were measured at the pressure of 101.3 kPa. Experimental data of all ternary systems passed the thermodynamic consistency test by modified McDermott-Ellis method. Then, the effects of salts on the vapor-phase mole fraction of 2-propanol and the relative volatility of 2-propanol to water were analyzed. Results show that the azeotropic point of the system 2-propanol and water can be removed with addition of the salts, and the salting-out effects follow the order: calcium nitrate greater than calcium chloride greater than magnesium nitrate greater than magnesium chloride. Furthermore, the LIQUAC model was adopted to correlate the VLE experimental data of the systems. The comparative results of the average relative deviation ( z ) and the corresponding standard deviations ( ) between the experimental and calculated values indicate that LIQUAC model is suitable for the VLE calculation for the systems of 2-propanol+ water + salts.