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The vapour pressures of binary mixtures of cyclohexanone + dichlo- roalkane (1,3-dichloropropane and 1,4-dichlorobutane) were measured at tem- peratures between 298.15 and 318.15 K. The vapour pressures vs. liquid phase composition data were used to calculate the activity coefficients of the two components and the excess molar Gibbs energies G E for the mixtures, using the Barker method and the Redlich-Kister, Wilson, NRTL and UNIQUAC equa- tions, taking into account the vapour phase imperfection in terms of the 2 nd virial coefficient. No significant difference between the G E values obtained with these equations was observed.

Isothermal vapour-liquid equilibria in cyclohexanone + dichloroalkane binary mixtures at temperatures from 298.15 to 318.15K