Search

The experimental data of vapor–liquid equilibrium for the binary systems methyl acetate + 1–propanol, methyl acetate + 1–butanol and ethyl acetate + 1–propanol at 1.5 MPa has been obtained, using an ebulliometer made of stainless steel. This equipment works through the Cottrell pump effect, so that the liquid and vapor phases are recirculated. The isobaric data T–x–y are informed and analyzed with respect to the literature data. The evolution of the azeotropic point with the pressure in the binary system of ethyl acetate + 1–propanol is included. The thermodynamic consistency of the systems was verified by employing the Peng–Robinson equation of state in different forms and using the φ–φ approach.

Isobaric vapor–liquid equilibrium data for the binary systems methyl acetate + 2-propanol and ethyl acetate + 2-propanol at 1.5 MPa were obtained. The data quality was verified by using the point-to-point test of Van Ness and the Fortran routine of Fredenslund et al., which was implemented to third virial coefficient using the method of Orbey and Vera. Experimental data satisfied the validation criterion of Fredenslund et al. The azeotropic point of ethyl acetate + 2-propanol was not found at 1.5 MPa. The ASOG low pressure group contribution models and different versions of UNIFAC were employed for the verification of high pressure vapor–liquid equilibrium data predictions. The ϕ – ϕ approach was applied by using the Peng–Robinson equation of state and employing quadratic mixing rules. The UNIFAC-Lyngby model returned good overall predictions; however the modeling for both systems was best when the Peng–Robinson equation of state was applied.