VAPOR-LIQUID-EQUILIBRIA AT 413.65 K AND EXCESS-ENTHALPIES AT 323.15, 363.15, AND 413.15 K FOR MIXTURES OF BENZENE, TOLUENE, PHENOL, AND BENZALDEHYDE

Isothermal P, x data at 413.65 K, excess enthalpies at 323.15, 363.15, and 413.15 K, and azeotropic data are presented for binary systems co ntaining benzaldehyde, benzene, toluene, and phenol. Reliable informat ion about the real behavior of systems including these components is v ery important for various chemical processes, e.g., for the production of phenol by toluene oxidation. Furthermore, these data will be used for the revision, extension, and further development of the group cont ribution method modified UNIFAC (Dortmund). The vapor-liquid equilibri um (VLE) data of four systems were measured using a static apparatus. In the case of the system benzaldehyde + phenol, azeotropic data were determined by distillation. For all systems, the corresponding experim ental excess enthalpy (HE) data were determined with the help of an is othermal flow calorimeter. For the simultaneous description of VLE and HE data, the NRTL model was used.