Vapor-liquid equilibrium of durene in methanol or ethanol

The vapor-liquid equilibrium behavior of durene in methanol or ethanol was measured at atmospheric pressure (98 kPa) in the dilute composition range of durene with a recirculation still. Equilibrium compositions were determined with an ultraviolet spectrometer. The reliability of the compositions seems to be +/-1 x 10(-6) mole fraction of durene. The accuracies of temperature and pressure are +/-0.01 K and +/-0.01 kPa, respectively. The volatilities K-i = y(i)/x(i) of durene at infinite dilution were determined to be 0.173 and 0.162 in methanol and ethanol, respectively.