Phase equilibria of the ternary system benzene plus cyclohexane+1-pentanolat 101.3 kPa

Vapor-liquid equilibrium at 101.3 kPa has been measured for the ternary sys tem benzene + cyclohexane + l-pentanol in an isobaric equilibrium still wit h secondary recirculation of both vapor and liquid phases. Satisfactory res ults were obtained for the prediction of activity coefficients and the equi librium compositions with the ASOG and UNIFAC group contribution models; lo w 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 ar e presented.