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The vapor-liquid equilibrium (VLE) data of the ethanol + sec-butyl acetate, 1-propanol + sec-butyl acetate, and 2-propanol + sec-butyl acetate mixtures were determined at 101.3 kPa. The first principle quantum chemistry calculation method, which focuses on the hydrogen bond and interaction energies, is used to give insight into interactions at the molecular level. The experimental VLE data passed the thermodynamic consistency test. The data were regressed using Wilson, nonrandom two liquids, and universal quasi-chemical equations. The 1-propanol + sec-butyl acetate mixture forms a minimum temperature azeotropic mixture. The azeotropic temperature is 370.01 K, and the composition of 1-propanol is 89.2 mol % when calculated with the Wilson model. [ABSTRACT FROM AUTHOR]

The isobaric vapor-liquid equilibrium (VLE) data of methyl ethyl ketone (MEK) + sec-butyl acetate (SBAC), 2-methoxyethanol + SBAC, and 1, 2-dimethoxyethane (DME) + SBAC were determined at 101.3 kPa by using an Ellis vapor-liquid equilibrium still. The experimental data passed the thermodynamic consistency test by Herington method and Wisniak test. The VLE values were correlated by the nonrandom two-liquid (NRTL), universal quasichemical activity coefficience (UNIQUAC), and Wilson activity-coefficient models. The results indicated that the three models had good agreement with the experimental data. The 2-methoxyethanol + SBAC system forms a minimum temperature binary azeotrope at 101.3 kPa. The azeotropic temperature is 383.86 K, and the composition of SBAC is 85.1 mol %. [ABSTRACT FROM AUTHOR]