[en] Isothermal vapor liquid equilibria for the binary system of 3-methylpentane with ethylene glycol monopropyl ether (C₃E₁) and ethylene glycol isopropyl ether (iC₃E₁) were measured at 303.15, 318.15, and 333.15K. In our previous work, phase equilibria for the binary system of C₃E₁ mixtures were investigated according to the chain length of alkane, alcohol or those isomer. But in this study, we discussed the different effect of C₃E₁ and its isomer, iC₃E₁, on the phase equilibria. The measured systems were correlated with a Peng-Robinson equation of state (PR EOS) combined with Wong-Sandler mixing rule for the vapor phase, and NRTL, UNIQUAC, and Wilson activity coefficient models for the liquid phase. All the measured systems showed good agreement with the correlation results. And it was found that the phase equilibria showed very little difference between the iC₃E₁ mixture system and the C₃E₁ mixture system

[en] Isothermal vapor liquid equilibria for the binary system of ethylene glycol monopropyl ether with 2,2-dimehylbutane and 2,3-dimethylbutane were measured in a circulating water bath at 303.15, 318.15, and 333.15 K. The apparatus was in-house designed and manufactured. Consistency testing of the apparatus was done by comparing the measured vapor pressures to the calculated vapor pressures from the Antoine equation. The measured systems were correlated with a Peng-Robinson equation of state (PR) combined with Wong-Sandler mixing rule for the vapor phase, and NRTL, UNIQUAC, and Wilson activity coefficient models for the liquid phase. All the measured systems showed good agreement with the correlation results

[en] Highlights: • 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 G"E models. • The experimental data are fit well with all three models. - Abstract: 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