Isothermal Vapor−Liquid Equilibrium Data at T = 333.15 K and Excess Molar Volumes and Refractive Indices at T = 298.15 K for the Dimethyl Carbonate + Methanol and Isopropanol + Water with Ionic Liquids

Abstract

Isothermal vapor−liquid equilibrium (VLE) data at T = 333.15 K are reported for the four ternary systems dimethyl carbonate (DMC) + methanol + 1-ethyl-3-methylimidazolium ethyl sulfate (EMISE), DMC + methanol + 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]), isopropanol + water + EMISE, and isopropanol + water + [Bmim][BF4] by using headspace gas chromatography. The mole fraction of ionic liquids was varied from 0.05 to 0.2. The experimental binary VLE data were correlated using the Wilson, NRTL, and UNIQUAC equations. In addition, the excess volumes and deviations in molar refractivity data are reported at T = 298.15 K for the sub-binary pairs of the above-mentioned ternary systems. These properties are correlated with the Redlich−Kister equation. Finally, the ternary excess volumes and deviations in molar refractivity data were calculated from the Radojkovic equation using correlated binary Redlich−Kister parameters.