Measurement and Correlation of Vapor−Liquid Equilibria at T = 333.15 K and Excess Molar Volumes at T = 298.15 K for Ethanol + Dimethyl Carbonate (DMC), DMC + 1-Propanol, and DMC + 1-Butanol

Abstract

Isothermal vapor-liquid equilibrium (VLE) data are measured for ethanol + dimethyl carbonate (DMC), DMC + 1-propanol, and DMC + 1-butanol at T ) 333.15 K by a using headspace gas chromatography (HSGC) method. The binary systems containing ethanol and 1-propanol have minimum boiling azeotropes. The experimental binary VLE data were correlated with common g E model equations. Excess molar volumes (V E ) of ethanol + DMC, 1-propanol + DMC, and 1-butanol + DMC are obtained from the measured densities at T ) 298.15 K by using a digital vibrating tube densimeter. All measured V E are shown positive deviation from ideal mixing and are correlated with the five-parameter Redlich-Kister polynomial.

Isothermal vapor–liquid equilibrium at 333.15K and excess molar volumes and refractive indices at 298.15K for the mixtures of di-methyl carbonate, ethanol and 2,2,4-trimethylpentane

“…A minimum boiling azeotrope was observed in this system. The other constituent binary systems of the ternary system DMC (1) + ethanol (2) + 2,2,4-trimethylpentane (3), DMC (1) + ethanol (2), DMC (1) + 2,2,4-trimethylpentane (2) have also minimum boiling azeotropes which was reported in our previous work [6,7]. They are also represented in Fig.…”

“…1 for better understanding. The coordinates of the azeotrope of the system ethanol (1) + 2,2,4-trimethylpentane (2) is x az 1 = 0.6110 and P az = 63.89 kPa (2) from previous work [6]; ( ), DMC (1) + 2,2,4-trimethylpentame (2) from previous work [7]; ( ), ethanol (1) + 2,2,4-trimethylpentame (2); (+), ethanol (1) + 2,2,4-trimethylpentame (2) by Hiaki et al [16]. Solid curves were calculated from best fitted G E model parameters.…”

“…As far as we know, there are no ternary VLE data at 333.15 K and no excess property data at 298.15 K for DMC + ethanol + 2,2,4-trimethylpentane. We reported earlier VLE data at 333.15 K for the systems DMC (1) + ethanol (2), DMC (1) + 2,2,4-trimethylpentane (2) and and n D values at 298.15 K for ethanol (1) + 2,2,4-trimethylpentane (2) [6][7][8]. The binary VLE data and excess properties in this work are supplements of sub-binary data for ternary system DMC + ethanol + 2,2,4 trimethylpentane.…”

Osmotic and activity coefficients for five lithium salts in three non–aqueous solvents

“…We first measured the vapor pressures of the salt-free solvents. Table 4 compares our vapor pressures with those from NIST [47] and those from the literature [26,[48][49][50][51][52][53][54][55][56]. Agreement is very good.…”

Liquid–liquid equilibria for the binary system of di-isopropyl ether (DIPE)+water in between 288.15 and 323.15K and the ternary systems of DIPE+water+C1–C4 alcohols at 298.15K

“…However, to date, relatively few investigations on systems with ether compounds have been reported in the literature. Therefore, we have studied the phase equilibria and mixture properties of this type of systems systematically for various gasoline additives [2,3].…”