Effect of imidazolium-based ionic liquid on vapor–liquid equilibria of 2-propanol + acetonitrile binary system at 101.3 kPa

• Published in: Fluid phase equilibria 2016-02, Vol.409, p.383-387
• Main Authors: Zhu, Wei, Qing, Li, Liu, Bing, Cai, Xinbing, Fan, Zenglu
• Format: Article
• Language: English
• Subjects: 1-butyl-3-methylimidazolium tetrafluoroborate; 1-ethyl-3-methylimidazolium tetrafluoroborate; 2-propanol; Acetonitrile; Barometric pressure; Binary systems; Computational fluid dynamics; Fluid flow; Fluids; Ionic liquids; Phase equilibria; Vapor–liquid equilibrium
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2015.10.035

Vapor–liquid equilibrium (VLE) data for one binary system (2-propanol + acetonitrile) and two ternary systems {2-propanol + acetonitrile + 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]), 2-propanol + acetonitrile + 1-butyl-3- methylimidazolium tetrafluoroborate ([BMIM][BF4])} were determined at atmospheric pressure (101.3 kPa). It was found that the studied ionic liquids (ILs) both showed a salting-out effect, which leads to the elimination of the azeotropic point, and that the order of separation capacity for imidazolium-based ILs is [EMIM][BF4] > [BMIM][BF4]. All experimental data could be well correlated by nonrandom two-liquid (NRTL) model. [Display omitted] •Isobaric VLE data for 2-propanol + acetonitrile + imidazolium-IL were studied.•The addition of ILs could eliminate the azeotropic point of azeotrope.•The separation capacity order for imidazolium-ILs is [EMIM][BF4] > [BMIM][BF4].•ALL VLE data were correlated with NRTL.