Isothermal (vapor + liquid) equilibria for the binary mixtures of (propylene oxide + ethanol) and (propylene oxide + 1-propanol) at several temperatures

• Phase equilibrium data for propylene oxide with alcohols were investigated.
• The experimental data were correlated with PRSV EOS.
• Van der Waals one fluid and Wong–Sandler mixing rule were used.
• NRTL, UNIQUAC, Wilson models were chosen as GE models.
• The experimental data are fit well with all three models.

Isothermal (vapor + liquid) equilibrium data for the binary mixtures of (propylene oxide + ethanol) and (propylene oxide + 1-propanol) were measured using a static apparatus at three different temperatures ranging from (303.15 to 333.15) K at an interval of 15 K. The measured data were correlated using Peng–Robinson–Stryjek–Vera equation of state (PRSV EOS) combined with van der Waals one-fluid mixing rule for the vapor phase and with Wong-Sandler mixing rule involving a non-random two liquid (NRTL) model, universal quasi-chemical (UNIQUAC) model and Wilson model for the liquid phase. The experimental data are in good agreement with the correlation results.