Separation of the Azeotropic Mixture Methanol and Toluene Using Extractive Distillation: Entrainer Determination, Vapor–Liquid Equilibrium Measurement, and Modeling
Shanshan He, Wenyang Fan, Huiwen Huang, Jun Gao, Dongmei Xu, Yixin Ma, Lianzheng Zhang, Yinglong Wang
Abstract
curve. The vapor-liquid equilibrium data of the binary and ternary systems for (toluene + butyl propanoate), (toluene + triethylamine), (toluene + butyl butanoate), and (methanol + toluene + butyl butanoate) were determined. The reliability for the experimental vapor-liquid equilibrium (VLE) data was assessed with the van Ness method. The measured data was fitted by the UNIQUAC, Wilson, and NRTL models, and the correlated results were consistent with the determined VLE data. In addition, the COSMO-UNIFAC model was used to predict the VLE data for comparison.
Topics & Concepts
UNIQUACNon-random two-liquid modelUNIFACExtractive distillationTolueneRelative volatilityChemistryTriethylamineVapor–liquid equilibriumDistillationThermodynamicsMethanolAzeotropic distillationOrganic chemistryChromatographyActivity coefficientAqueous solutionPhysicsProcess Optimization and IntegrationChemical and Physical Properties in Aqueous SolutionsPhase Equilibria and Thermodynamics