Abstract
Isobaric vapor–liquid equilibrium (VLE) data for the binary systems formed by (propyl acetate +2-methylbutan-1-ol), (propyl acetate + hexan-1-ol), and (propyl acetate + heptan-1-ol) have been determined at the pressure of 101.3 kPa using an equilibrium still. The experimental data were checked through the semiempirical methods of Herington, and the thermodynamic consistency was satisfactory. The activity coefficients were correlated with the nonrandom two liquid (NRTL), Wilson, and universal quasichemical (UNIQUAC) models. In addition, the UNIQUAC functional-group activity coefficients (Do) model was used to correlate the VLE data. The NRTL model shows slightly better results compared with other three models among all three binary systems.
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