Isobaric Vapor–Liquid Equilibrium for Binary and Ternary Systems of 2-Methoxyethanol, Ethylbenzene, and Dimethyl Sulfoxide at 100.00 kPa

Abstract

The isobaric vapor−liquid equilibrium (VLE) data for the binary systems 2-methoxyethanol + ethylbenzene, ethylbenzene + dimethyl sulfoxide (DMSO), and 2-methoxyethanol + DMSO and the ternary system 2-methoxyethanol + ethylbenzene + DMSO were measured with a Fischer VLE 602 apparatus at 100.00 kPa. The VLE data for all the binary and ternary systems were thermodynamically consistent and passed the Wisniak's L−W test. The binary VLE data were correlated with the Wilson, nonrandom two-liquid, and universal quasichemical models with minor deviations. The ternary VLE data predicted from the corresponding binary interaction parameters agreed well with the experimental data. The azeotropic temperature and composition of the 2-methoxyethanol and ethylbenzene azeotropic mixture at 100.00 kPa were 391.05 K and 60.15 mol % 2-methoxyethanol, respectively. Additionally, the azeotrope disappeared after adding DMSO, which confirms that DMSO can serve as a prospective entrainer for separating 2-methoxyethanol from ethylbenzene in the extractive distillation process.

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

“…Extractive distillation is an effective separation technique for the pressure-insensitive azeotropic mixture. , Here, we determined the VLE data for the ethyl acetate + methylcyclohexane system in the presence of decane to evaluate the feasibility to separate them by the extractive distillation process. The isobaric VLE data are presented in Table and shown graphically in Figures and S15.…”

Isobaric Vapor–Liquid Equilibrium for the Binary System of Dimethyl Adipate and 1,6-Hexanediol at 10, 20, and 99 kPa

“…To ensure the reasonability of the experimental data, the thermodynamic consistency was checked by Wisniak’s L – W test, − which can be described with the following equations where T i ° , Δ h i ° , and Δ s i ° are the boiling point, enthalpy of vaporization, and entropy of vaporization of pure component i at different pressures, respectively. The values of Δ h i ° for component i are taken from Aspen Plus V8.4 physical property databanks.…”