Isobaric Vapor–Liquid Equilibrium for Binary System of Isoamyl dl-Lactate and Isoamyl Alcohol at 25.0, 50.0, and 101.3 kPa

Abstract

Isobaric vapor–liquid equilibrium (VLE) data for the binary system of isoamyl dl-lactate and isoamyl alcohol were measured at 25.0, 50.0, and 101.3 kPa in a modified Rose equilibrium still. The mixtures do not represent azeotropes. The determined experimental data were checked by Wisniak and van Ness tests to verify their thermodynamic consistency. Meanwhile, the Wilson, NRTL, and UNIQUAC models are adopted to correlate the VLE data, and the parameters of the three models were regressed. The UNIQUAC model showed the best fit to the experimental values relative to the Wilson and NRTL models, and it had the lowest root-mean-square deviations of equilibrium temperature (T) and mole fraction of the vapor phase (y 1), with the value of 1.54 K and 0.0234, respectively.

Isobaric Vapor–Liquid Equilibrium for the Binary System of Cumene + Acetophenone at 101.3, 30.0, and 10.0 kPa

“…Xu et al. have verified the reliability of the vapor–liquid equilibrium apparatus used in this work by measuring the VLE data of the binary system of benzene and toluene . The average absolute error in boiling temperature between the experimental data and the literature ones , was less than 0.2 K. The results indicate that the experimental apparatus is reliable.…”

Isobaric Vapor–Liquid Equilibrium for the Binary Mixture of 1-Butanol + Butyl l-Lactate at 1 and 5 kPa

“…According to the nature of the components and the low operating pressure (1 and 5 kPa), Van Ness and Fredenslund's methods 14,15 were selected for the thermodynamic consistency. As a result of the research by Xu et al, 18…”

“…According to the nature of the components and the low operating pressure (1 and 5 kPa), Van Ness and Fredenslund’s methods , were selected for the thermodynamic consistency. As a result of the research by Xu et al, eqs and represent the Van Ness point by the point test, which refers to the mean absolute deviation between experimental data and calculated values. The term N represents the number of the experimental data, y 2, i exp and P 2, i exp are the vapor fraction and pressure, respectively, and y 2, i exp and P 2, i calc are the calculated vapor fraction and pressure, respectively. To achieve consistency, the values of Δ y 2 and Δ P 2 must be less than 1.…”

Isobaric Vapor–Liquid Equilibrium of Isoamyl Alcohol, Cyclohexane, n-Hexane, and the n-Heptane + Isoamyl Butyrate Binary System at 101.3 kPa

“…In this work, three common entrainers of isoamyl butyrate and its reactant (isoamyl alcohol) were studied. The isobaric VLE data of four binary systems, isoamyl alcohol + isoamyl butyrate, cyclohexane + isoamyl butyrate, n -hexane + isoamyl butyrate, and n -heptane + isoamyl butyrate, are determined using a modified Rose vapor recirculating-type equilibrium still. − The Fredenslund test method and Van Ness point test method were used to test the thermodynamic consistency of the experimental VLE data. − Finally, Aspen Plus was used to regress the binary interaction parameters (BIPs) of the three activity coefficient models of NRTL, UNIQUAC, and Wilson. − The relative volatility of the binary system was accurately calculated, which provided data support for process simulation for selecting the best entrainer in the synthesis of isoamyl butyrate.…”