VAPOR-LIQUID-EQUILIBRIA OF BINARY AND TERNARY MIXTURES OF CYCLOHEXANE, 3-METHYL-2-BUTANONE, AND OCTANE AT 101.3 KPA

Vapor-liquid equilibria were measured at 101.3 kPa for the three binar y and one ternary mixtures of cyclohexane, 3-methyl-2-butanone, and oc tane. The isobaric T-x-y data were reported, including an azeotropic p oint for the binary mixture cyclohexane + 3-methyl-2-butanone, The vir ial equation of state truncated after the second coefficient was used to calculate the vapor-phase fugacity coefficients. The Tsonopoulos co rrelation equation was applied to determine the second virial coeffici ents. Various activity coefficient models of the Wilson, the NRTL, and the UNIQUAC equations were used to correlate the binary experimental vapor-liquid equilibrium results. Optimally-fitted binary parameters o f the activity coefficient models were obtained and those paramters of the NRTL model were employed to predict the ternary vapor-liquid equi libria. Satisfactory results were presented for the correlation and pr ediction of the vapor-liquid equilibrium data on binary and ternary mi xtures.