The excess volume
of binary mixtures and the isobaric vapor–liquid
equilibrium (VLE) data at high pressure have been determined. The
VLE values for methyl acetate + n-heptane or 2,2,4-trimethylpentane
and ethyl acetate + n-heptane or 2,2,4-trimethylpentane
at different pressures were obtained experimentally using a stainless
steel ebulliometer. The experimental data at 0.1 MPa were verified
by using the point-to-point test. The high pressure data were verified
by employing the ϕ–ϕ approximation. The equations
of state (EOSs) of Peng–Robinson–Stryjek–Vera,
with both quadratic or Wong–Sandler mixing rules, and the PC-SAFT
were applied for modeling purposes. It has been verified that the
azeotropic point in the binary mixtures of this work was eliminated
by increasing the pressure.