Measurement and Modeling for Isobaric Vapor–LiquidEquilibrium of Binary 1,3,5-Trichlorobenzene + 3,5-Dichloroanilineand 3-Chloroaniline + 3,5-Dichloroaniline Systems.

Theisobaric vapor–liquid equilibrium data for binary systemsof 1,3,5-trichlorobenzene (1) + 3,5-dichloroaniline (2) and 3-chloroaniline(1) + 3,5-dichloroaniline (2) were measured experimentally under pressuresof 20.00, 60.00 and 101.20 kPa using an inclined ebulliometer. Thermodynamicconsistency of the vapor–liquid equilibrium data was testedby means of the Herington semiempirical method, and the isobaric vapor–liquidequilibrium data were correlated with three activity coefficient models,which were Wilson, NRTL and UNIQUAC. The energy interaction parameterswere acquired by a nonlinear least-squares regression method for thethree thermodynamic models. Results indicate that all the three activitycoefficient models can describe the measured isobaric vapor–liquiddata acceptably. The isobaric vapor–liquid equilibrium datadetermined in the present work are important in the design and operationfor purification of 3,5-dichloroaniline by distillation. [ABSTRACT FROM AUTHOR]