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

ABSTRACT

Isobaric vapor-liquid equilibrium of tert-butanol + chlorobenzene, tert-butyl acetate + chlorobenzene binary systems and tert-butanol + tert-butyl acetate + chlorobenzene ternary system at 101.33 kPa were measured using a circulation VLE still. The data of binary systems passed the thermodynamic consistency test of Herington method and the Van Ness point test. And the experimental data of ternary system also passed the Wisniak consistency test. These binary systems VLE data were fitted by the Wilson, nonrandom two-liquid (NRTL) and universal quasichemical (UNIQUAC) activity coefficient models with minor deviation. Furthermore, the obtained binary interaction parameters from the binary systems were used to predict the VLE behavior of tert-butanol + tert-butyl acetate + chlorobenzene ternary system. The RMSD of vapor and temperature between experimental and predicted values for ternary system were smaller than 0.0304 and 0.81K, respectively. The results indicated the relative volatility between tert-butanol and tert-butyl acetate increase obviously by adding chlorobenzene as a solvent. Thus, chlorobenzene is a promising solvent for the separation of the tert-butanol and tert-butyl acetate mixture system by extractive distillation.