MEASUREMENTS OF VAPOR-LIQUID-EQUILIBRIUM, HE AND UPSILON-E FOR BINARY AND TERNARY MIXTURES OF METHANOL, ETHYL IODIDE AND TOLUENE

Results of a series of experimental investigations with CH3OH, C2H5I and C6H5CH3 are reported. Vapor pressures of the pure substances and T, p, x, y data of two binary and one ternary system were determined in an ebulliometer; the enthalpy of mixing of equimolar mixtures for two binaries was measured in a simple calorimetric experiment, and the density of the two binary systems was measured as a function of composition at 293.15 K with a vibrating U-tube densimeter. The consistency of the binary vapor-liquid equilibrium (VLE) data was tested. Binary parameters in various g(E) models were fitted and new UNIFAC parameters were determined. Experimental h(E) were compared with h(E) values calculated from VLE data.