Vapor-liquid equilibrium and excess properties of the binary mixtures formed by ethyl isobutyrate and n-alkanols

Abstract

This contribution reports densities together with the corresponding excess molar volumes, and excess molar enthalpies of the binary mixtures formed by ethyl isobutyrate and n-alkanols (from methanol to 1-butanol) at two temperatures (303.15 and 323.15) K and at atmospheric pressure (p = 0.1 MPa). These excess properties were correlated with composition using the Redlich-Kister equation. Excess molar volumes and enthalpies are positive, except the excess molar volumes for the mixture ethyl isobutyrate and methanol. Furthermore, the vapor-liquid equilibrium data for these mixtures at different experimental conditions have been also presented. Both the isothermal VLE at two temperatures (303.15 and 323.15) K and isobaric VLE at two pressures (40.000 and 101.325) kPa were measured. Some of the systems exhibit azeotropic points. The VLE data were found thermodynamically consistent. From experimental data the activity coefficients along with excess Gibbs function (isothermal) and reduced excess Gibbs functions (isobaric) were obtained and correlated with composition using the Wilson equation. These excess Gibbs function and reduced excess Gibbs functions were found positive. Finally, we have used our experimental VLE data to check the reliability of modified UNIFAC predictions.

Density, Excess Molar Volume and Vapor–Liquid Equilibrium Measurements at 101.3 kPa for Binary Mixtures Containing Ethyl Acetate and a Branched Alkane: Experimental Data and Modeling

“…Isobaric vapor-liquid equilibrium measurements for pure components and mixtures were performed using a recirculation ebulliometer (Labodest VLE 602, ILUDEST, Waldbüttelbrunn, Germany) equipped with a Cottrell pump. This type of equipment is routinely employed for low-pressure VLE measurements and extensively described in the literature [32][33][34][35][36].…”

Density, Speed of Sound, and Refractive Index of Binary Mixture Containing Ethyl Isobutyrate with Cyclohexane at Different Temperatures Combined with Experiment and Molecular Simulation

“…Flavors and fragrances are dependable companions in daily life. − Ethyl isobutyrate is used as raw material for food flavoring agents. − It can also be used as raw materials for cigarettes, daily chemical products, and excellent organic solvent. It is essential to preserve the quality and characteristics of flavor molecules to maintain the scent.…”

“…Several studies of ethyl isobutyrate or cyclohexanol’s thermodynamic behavior and physical properties have been performed. ,− However, detailed investigations of the physical properties of ethyl isobutyrate and cyclohexanol mixture over a wide range of temperatures are scarce in the literature. Therefore, this study measures the experimental data such as density, speed of sound, and refractive index, for the binary systems containing ethyl isobutyrate with cyclohexane at five temperatures (293.15, 298.15, 303.15, 313.15, and 323.15 K) and atmospheric pressure (0.1 MPa).…”