VAPOR-LIQUID-EQUILIBRIA FOR THE BINARY-SYSTEMS OF METHYLCYCLOHEXANE WITH 1-PROPANOL, 2-PROPANOL, 1-BUTANOL, AND 2-BUTANOL AT 101.3 KPA

Isobaric vapor-liquid equilibrium measurements at 101.3 kPa ape report ed fbr the binary systems methylcyclohexane + I-propanol, + 2-propanol , + I-butanol, and + 2-butanol. The systems show a strong positive dev iation from ideality and present a minimum temperature azeotrope, The activity coefficients were found to be thermodynamically consistent by the methods of Van Ness-Byer-Gibbs and Wisniak. The date were correla ted with five liquid-phase activity coefficient models (Margules, Van Laar, Wilson, NRTL, and UNIQUAC). According to the average deviations in temperature and in vapor composition the best model for the systems is NRTL.