Isobaric vapor–liquid equilibrium is measured at 0.15 and 0.6 MPa for binary mixtures of butyl acetate with 2-propanol and 2-butanol. The experimental data are reported and the thermodynamic consistency is verified by using the point-to-point test. Prediction of these binary systems was obtained by employing the analytical solutions of groups (ASOG) and the different versions of UNIQUAC functional-group activity coefficients (UNIFAC) group contribution models. The perturbed chain-statistical associating fluid theory (PC-SAFT) equation of state has been used to reproduce experimental data.

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The isobaric vapor–liquid equilibrium for the binary mixtures of n-heptane + ethanol, n-heptane + 1-propanol, n-heptane + 2-propanol, and n-heptane + 1-butanol at 1.5 MPa was obtained experimentally using a stainless steel ebulliometer. The experimental data have been verified thermodynamically by employing the ϕ–ϕ approximation. The azeotropic points in both mixtures have been verified by considering the trend of the azeotropic data and using the bibliographic data for each mixture. The Peng–Robinson–Stryjek–Vera equation of state using both quadratic and Wong–Sandler mixing rules as well as the Perturbed Chain–Statistical Associating Fluid Theory was applied to evaluate the reproducibility of the data by these models.

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.