VAPOR-LIQUID-EQUILIBRIA BEHAVIOR OF METHYL-ESTERS AND PROPAN-2-OL AT 74.66, 101.32 AND 127.99 KPA

Isobaric vapor-liquid equilibrium data were measured at 74-66, 101.32 and 127.99 kPa for binary mixtures composed of methyl ethanoate or met hyl propanoate and propan-2-ol using a dynamic method. In thermodynami c calcutions using the data, the vapor phase was considered to be non- ideal, and all the systems studied exhibit positive deviations from id eal solution behavior. At 74.66 kPa, the binary system (x1 methyl prop anoate +x2 Propan-2-ol) presents an azeotrope at x1 = 0.666, T = 340.4 7 K.; as pressure increased, azeotrope concentration decreased quasi-r egularly towards regions richer in propan-2-ol. After reduction of the data by fitting with a suitable equation and verification of thermody namic consistency, various group-contribution models were applied to e stimate the isobaric VLE data. The mean error in prediction of the act ivity coefficients for each system in no case exceeded 7%.