Separation of azeotrope (allyl alcohol plus water): Isobaric vapour-liquid phase equilibrium measurements and extractive distillation

To separate the azeotrope of (allyl alcohol + water) by extractive distillation, N-methyl-2-pyrrolidone, N-methyl formamide and ethylene glycol were selected as extractive agents, and the isobaric VLE data for the binary systems of (allyl alcohol + N-methyl-2-pyrrolidone), (allyl alcohol + N-methyl formamide) and (allyl alcohol + ethylene glycol) were determined at 101.3 kPa by a modified Rose type recirculating still. The thermodynamic consistency of the experimental data was checked by the Herington, van Ness, infinite dilution, and pure component consistency method. Meanwhile, the experimental data were correlated by the NRTL, UNIQUAC and Wilson activity coefficient models, and the binary interaction parameters of the three models were regressed. All the correlated results by the NRTL, UNIQUAC, and Wilson models agreed well with the experimental data. Furthermore, the extractive distillation processes with the extractive agents were presented to separate the azeotrope of (allyl alcohol + water). (C) 2017 Elsevier Ltd.