Vapor−Liquid Equilibria of Binary and Ternary Mixtures of 2-Propanol, 1-Chlorobutane, and Acetonitrile at 101.3 kPa
04 Feb 1998-Journal of Chemical & Engineering Data (American Chemical Society)-Vol. 43, Iss: 2, pp 259-263
TL;DR: In this article, van Laar, Wilson, NRTL, and UNIQUAC were used to predict ternary vapor−liquid equilibria, and a comparison of model performances was made by using the criterion of absolute average deviations in boiling point and in vapor-phase composition.
Abstract: Vapor−liquid equilibria were measured at 101.3 kPa for three binary mixtures and one ternary mixture of 2-propanol, 1-chlorobutane, and acetonitrile. Thermodynamic consistency of data for the three binary mixtures was tested using the Herington method. The Soave−Redlich−Kwong equation of state was used to calculate the vapor-phase fugacity coefficients. The experimental vapor−liquid equilibrium data were reduced, and binary parameters for four activity coefficient models, such as van Laar, Wilson, NRTL, and UNIQUAC, were fitted. The four models with their best-fitted parameters were used to predict the ternary vapor−liquid equilibria. A comparison of model performances was made by using the criterion of absolute average deviations in boiling point and in vapor-phase composition.
Citations
More filters
TL;DR: In this paper, a triple-column extractive distillation is investigated for the separation of acetonitrile/isopropanol/water mixture with ethylene glycol (EG) as entrainer.
41 citations
TL;DR: This manuscript examines consistency checks via Gibbs−Duhem equations and finds most powerful a two-step method that (1) uses a combination of the liquid and vapor Gibbs− Duhem equations to first check the internal consistency of (P, y, x) at constant temperature or (T,Y, x] at constant pressure and (2) then uses the liquid-side Gibbs−duhem equation to check theliquid-phase activity coefficients in a test more familiar to most workers.
Abstract: Many VLE data papers are published each year for binary systems at either constant temperature or constant pressure. This manuscript examines consistency checks via Gibbs-Duhem equations and finds most powerful a two-step method that (1) uses a combination of the liquid and vapor Gibbs-Duhem equations to first check the internal consistency of (P, y, x) at constant temperature or (T, y, x) at constant pressure and (2) then uses the liquid-side Gibbs-Duhem equation to check the liquid-phase activity coefficients in a test more familiar to most workers. A new graphical method is developed in conjunction with step 1. The role of the assumed gas-phase model is examined. The common problem of published data of the activity coefficient of the solvent falling slightly under unity upon approaching the pure solvent end on the familiar ln Ai versus x1 diagram is explained as an artifact of usual data reduction procedures but corrected by the present procedures.
22 citations
TL;DR: In this article, a new Gibbs excess mixing rule for cubic equations of state is developed based on the assumption of a zero excess volume liquid-like phase, which can reproduce the underlying liquid activity model at low pressures.
22 citations
TL;DR: In this paper, for separating the azeotrope (acetone+n-heptane) by homogeneous extractive distillation, 1-chlorobutane and butyl propanoate were chosen as the intermediate and heavy boiling entrainers.
20 citations
TL;DR: In this article, the salting-out effect of ionic liquids was found to lead to the elimination of the azeotropic point, and the order of separation capacity for imidazolium-based ILs was shown to be [EMIM][BF4]>[BMIM].
16 citations
References
More filters
Snam1
TL;DR: In this article, a modified Redlich-Kwong equation of state is proposed, which can be extended successfully to multicomponent-VLE calculations for mixtures of nonpolar substances, with the exclusion of carbon dioxide.
5,318 citations
645 citations
TL;DR: In this article, the vapour pressure of methanol, ethanol, pentan-1-ol, octan- 1-ol and octadecan-1 -ol have been measured.
267 citations
TL;DR: In this paper, dielectric constants, densities, viscosities, and refractive indices for the propylene carbonate+acetonitrile system were determined over the entire composition range of the system and at various temperatures, ranging from 25 to 45°C.
Abstract: Dielectric constants, densities, viscosities, and refractive indices for the propylene carbonate+acetonitrile system were determined over the entire composition range of the system and at various temperatures, ranging from 25 to 45°C. Excess dielectric constants, excess volumes, excess viscosities, and excess Gibbs energies of activation of the viscous flow, as well as Kirkwood correlation factors, have been calculated and studied. Their behavior strongly suggests the existence of intermolecular interactions
149 citations
119 citations