Isothermal Vapor–Liquid Equilibria and Excess Gibbs Energies for Binary Mixtures of Cyclic Ethers with 1,2-Dichloroethane

Abstract

Isothermal vapor−liquid equilibria (VLE) are measured for three binary systems containing cyclic ethers: 1,3-dioxolane, 1,4-dioxane, or tetrahydropyran in mixture with 1,2-dichloroethane at 10 temperatures ranging from 273.15 to 353.15 K. A laboratory apparatus using the static method was employed to carry out the vapor pressures of the pure components and the mixtures. The VLE data were reduced by the Redlich−Kister equation and used to calculate activity coefficients then excess molar Gibbs free energies G E . The nonideality of the vapor pressure was considered in terms of the second molar virial coefficient. Both the mixtures formed by tetrahydropyran or 1,3-dioxolane with 1,2-dichloroethane show a minimum boiling point azeotrope. The experimental data were compared with the results provided for the modified UNIFAC (Do) and the DISQUAC models.

Measurements, Correlations, and Modified UNIFAC Predictions of Isobaric Vapor–Liquid Equilibrium Data for the Binary System of Dimethyl Carbonate + Anisole at Different Pressures

“…Thus, from isobaric VLE data of the binary system, G E maximum was at 0.5, but G E /RT values depend up on the temperature. In the case of isothermal VLE binary system, both G E and G E /RT values are maximum at 0.5, 34 and a similar phenomenon was also observed, as reported in the literature. 34−36 On the other hand, the predicted temperature and vapor compositions are in good agreement with the correlated results and well represent the experimental temperature over the entire range of pressure.…”

“…Thus, from isobaric VLE data of the binary system, G E maximum was at 0.5, but G E / RT values depend up on the temperature. In the case of isothermal VLE binary system, both G E and G E / RT values are maximum at 0.5, and a similar phenomenon was also observed, as reported in the literature. − …”

Phase Behavior Modeling of Mixtures Containing N-, S-, and O-Heterocyclic Compounds Using PC-SAFT Equation of State

“…Table S3 (see the Supporting Information) presents the adjusted binary interaction parameters in heterocycle + haloalkanes with AARD = 1.03%. Figure 6 The symbols are the experimental dat,a 77,79,81,105,106 and solid lines are PC-SAFT model estimations. According to the obtained results, good agreement is observed with the experimental data.…”

“…Table S3 (see the Supporting Information) presents the adjusted binary interaction parameters in heterocycle + haloalkanes with AARD = 1.03%. Figure also presents isothermal and isobaric VLE at constant pressures and temperatures, respectively, including (a) 1,3-dioxolane +1-chloropentane at 298.15, 313.15, 328.15 K, (b) 1,3-dioxolane +1-chloropentane at 40.0 and 101.3 kPa, (c) furfural + dichloromethane and furfural +1,2-dichloroethane both at 101.3 kPa, (d) tetrahydrofuran +1-chlorohexane at 40 and 101.3 kPa, (e) tetrahydrofuran +1-chloropentane at 298.15, 313.15, and 328.15 K, and (f) 1,2-dichloroethane +1,4-dioxane at 273.15, 293.15, 303.15, 323.15, and 343.15 K. The symbols are the experimental dat,a ,,,, and solid lines are PC-SAFT model estimations. According to the obtained results, good agreement is observed with the experimental data.…”

“…Vapor–liquid equilibrium for heterocyclic + haloalkane systems: (a) 1,3-dioxolane (1) + 1-chloropentane (2) system at 308.15, 313.15, and 318.15 K; (b) 1,3-dioxolane (1) + 1-chloropentane (2) system at 40 and 101.3 kPa; (c) furfural (1) + dichloromethane (2) and furfural (1) + 1,2-dichloroethane (2) systems both at 101.3 kPa; (d) tetrahydrofuran (1) + 1-chlorohexane (2) system at 40 and 101.3 kPa; (e) tetrahydrofuran (1) + 1-chloropentane (2) system at 298.15, 313.15, and 328.15 K; (f) 1,2-dichloroethane (1) + 1,4-dioxane (2) system at 273.15, 293.15, 303.15, 323.15, and 343.15 K. The symbols are experimental data, ,,,, and solid lines are PC-SAFT model estimations.…”