Phase Equilibria of the Ternary System Benzene + Cyclohexane + 1-Pentanol at 101.3 kPa

Vapor−liquid equilibrium at 101.3 kPa has been measured for the ternary system benzene + cyclohexane + 1-pentanol in an isobaric equilibrium still with secondary recirculation of both vapor and liquid phases. Satisfactory results were obtained for the prediction of activity coefficients and the equilibrium compositions with the ASOG and UNIFAC group contribution models; low standard deviations of vapor mole fraction and temperature were computed. Azeotropic behavior was observed only in the benzene + cyclohexane mixture. The correlation parameters for the Tamir−Wisniak and UNIQUAC equations are presented.