Vapor–liquid equilibrium at 0.15 MPa for binary mixtures of butyl acetate with methanol, ethanol, 1-propanol, and 1-butanol has been measured. The thermodynamic consistency was verified with the Redlich–Kister test, the Herington test, the direct Van Ness test, and the point-to-point test. Azeotropic data was found for the butyl acetate + 1-butanol binary system at 0.15 MPa. Modeling of binary systems was obtained by employing the group contribution models (ASOG and different versions of UNIFAC) and the perturbed chain-statistical associating fluid theory equation of state.

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Experimental data of vapor−liquid equilibria (VLE) are reported for the binary systems: ethanol (1) + water (2) at 100, 1500, and 2000 kPa. The data were verified for thermodynamic consistency by using different low-and high-pressure tests. The following minimum azeotropes were found for the binary systems: x 1,az = y 1,az = 0.899 and T = 351.39 K at 100 kPa, x 1,az = y 1,az = 0.857 and T = 440.70 K at 1500 kPa, and x 1,az = y 1,az = 0.850 and T = 453.83 K at 2000 kPa. The quality of the azeotropic data obtained was established by considering the trend of the bibliographic azeotropic data. The phase behavior was modeled using the Peng−Robinson equation of state (EOS) with several mixing rules and the perturbed-chain statistical associating fluid theory. The experimental data were satisfactorily correlated and a qualitative agreement with these predictive models was observed. ■ RESEARCH HIGHLIGHTS• VLE of water with ethanol was determined at 100, 1500, and 2000 kPa. • Data were verified with the area test, Van Ness direct test, and point-to-point test. • Data at high pressure were verified by using the Gibbs− Duhem equation. • Azeotropic data of water/ethanol were correlated.• VLE data of water + ethanol mixtures are well modeled by using different EOSs.

Experimental data of vapor–liquid equilibria (VLE) are reported for the following binary systems: butyl acetate+ethanol, butyl acetate+1–propanol and butyl acetate+1–butanol at 0.6 MPa. No azeotrope was found in the butyl acetate+1–butanol system at 0.6 MPa. The thermodynamic consistency of the obtained data was analyzed using some equations of state (EOS) in the point–to–point test. The phase behavior was satisfactorily modelled using the Peng–Robinson EOS. The new association parameter of the Hayden–O’Connell method was determined from 144 pure substances and the influence of the second virial coefficient calculations in the point–to–point test was evaluated.