Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The mixture of acetic acid, n-propyl acetate, and iso-propyl acetate, which needs to be separated, is obtained when iso-propyl acetate is produced by acetic acid and propene. The vapor-liquid equilibria (VLE) for acetic acid + n-propyl acetate + iso-propyl acetate ternary system and three subsystems were studied by ebulliometry at (20, 40, 60, 80, and 101.3) kPa. The vapor phase nonideality was described by the Hayden-O'Connell (HOC) equation and the liquid phase nonideality was represented by NRTL model and UNIQUAC model, respectively. The model parameters for acetic acid-n-propyl acetate, acetic acid-iso-propyl acetate and npropyl acetate-iso-propyl acetate were acquired from the experimental data, with the aid of Aspen Plus. The maximum overall average deviation of temperature between the experiment and model prediction is 0.46 K for NRTL-HOC model and 0.47 K for UNIQUAC-HOC model. The VLE data, as well as the model parameters acquired, may provide basic information for the separation of iso-propyl acetate by distillation.