Isobaric Vapor–Liquid Equilibrium for the Binary and Ternary System with Isobutyl Alcohol, Isobutyl Acetate and Dimethyl Sulfoxide at 101.3 kPa

Abstract

The isobaric vapor−liquid equilibrium (VLE) data for the binary systems isobutyl alcohol + dimethyl sulfoxide (DMSO), isobutyl acetate + DMSO, and ternary system isobutyl alcohol + isobutyl acetate + DMSO were measured at 101.3 kPa. All of the binary VLE data passed Wisniak's modifed Herington area test and Wisniak point and area test. Ternary VLE data passed Wisniak point test. The VLE data of binary systems were correlated with NRTL, UNIQUAC, and Wilson models. The ternary VLE behavior were successfully predicted by the correlated binary parameters. The VLE data for the binary and ternary systems predicted by the correlated interaction parameters were in good agreement with all the experimental data. The relative volatility of isobutyl acetate to isobutyl alcohol can be greatly increased by DMSO and the azeotropic point of isobutyl acetate and isobutyl alcohol will disappear if the mole fraction of DMSO is greater than 0.36. DMSO is a promising solvent for separating the azeotrope of isobutyl alcohol and isobutyl acetate by extractive distillation.

Vapor Pressure and Isobaric Vapor–Liquid Equilibrium for Binary Systems of Furfural, 2-Acetylfuran, and 5-Methylfurfural at 3.60 and 5.18 kPa

“…The models are taken from Aspen Plus V8.0 and are presented in Table . The interaction parameters of these models were regressed by minimizing the following OF: where σ x and σ y are standard deviations of the liquid and vapor concentrations, respectively (σ T = 0.1 K, σ p = 0.075 kPa, σ x = 0.005, and σ y = 0.004).…”

Isobaric Vapor–Liquid Equilibrium for Binary and Ternary Systems of tert-Butanol + tert-Butyl Acetate + Chlorobenzene at 101.33 kPa

“…The ternary system was found to be thermodynamically consistent by the Wisniak L-W test. , The test is described by the following equations. According to this method, the average and maximum values of F k are 1.212 and 3.692, respectively.…”

“…The experimental data of tert -butanol­(1) + chlorobenzene(3) and tert -butyl acetate(2) + chlorobenzene(3) systems were correlated with the Wilson, NRTL, and UNIQUAC activity coefficient models. − The interaction parameters of these models were adopted by minimizing the objective function (OF): N is the number of experimental points; T i exp and T i cal are the experimental and calculated temperatures, respectively; and y k , i exp and y k , i cal are the experimental and calculated vapor mole fractions, respectively. The correlated parameters of the above-mentioned three models, the root-mean-square deviations (rmsd) of the vapor mole fraction, and the boiling temperature between the experimental and calculated data are listed in Table .…”

“…This article presents the isobaric VLE data for binary systems TBA(1) + chlorobenzene(3) and TBAc(2) + chlorobenzene(3) and ternary system TBA(1) + TBAc(2) + chlorobenzene(3) at 101.33 kPa. The thermodynamic consistency was checked by the Herington method, the Van Ness test described by Fredenslund, and the Wisniak test. , Meanwhile, the experimental data of binary and ternary systems were correlated by the Wilson, NRTL, and UNIQUAC equations, and the obtained interaction parameters of the binary systems were employed to predict that of the ternary system of TBA(1) + TBAc(2) + chlorobenzene(3), which were in turn compared to the experimental VLE results.…”

Mechanistic Investigation of Isobutanol/Isobutyl Acetate Separation by Extraction Using Low-Transition Temperature Mixtures

“…Therefore, it is common to employ methods involving the addition of mass separation agents and utilize separation techniques such as extraction and extractive distillation. − Liu et al investigated the possibility of separating the azeotropic mixture of IBA and IBAC using dimethyl sulfoxide. The isobaric vapor–liquid equilibrium (VLE) data of the system were determined at atmospheric pressure, and the results demonstrated that the addition of dimethyl sulfoxide significantly enhanced the relative volatility of IBAC to IBA …”