Isothermal vapor–liquid equilibrium and molar excess Gibbs energies of two ternary systems containing either 1-butanol or 2-butanol + 1-hexene + methylbenzene at 313.15 K

1- or 2-butanol are biomass derived alcohols and their behavior in multicomponent mixtures is important in modeling biofuels. To this respect, accurate isothermal vapor–liquid equilibrium (VLE) data are reported for two new ternary systems containing either 1-butanol or 2-butanol (1) + 1-hexene (2) + methylbenzene (3) at 313.15 K. An accurate static technique consisting of an isothermal total pressure cell has been used for the measurements. Data reduction was done using Barker’s method providing correlations for GE. Wohl expansion, Wilson, NRTL and UNIQUAC correlations have been successfully applied to the mixtures.