Effect and Mechanism of 1-Hexyl-3-methylimidazolium-Based Ionic Liquids on the Isobaric Vapor–Liquid Equilibria of Methanol + Acetonitrile at 101.3 kPa

This work studied the separation effect of 1-hexyl-3-methylimidazolium-based ionic liquids (1-hexyl-3-methylimidazolium tetrafluoroborate [HMIM][BF4] and 1-hexyl-3-methylimidazolium trifluoromethanesulfonate [HMIM][OTF]) to separate a methanol and acetonitrile azeotropic system. The isobaric vapor–liquid equilibrium data obtained for the ternary systems {methanol + acetonitrile + ([HMIM][BF4] or [HMIM][OTF])} were measured at 101.3 kPa. Based on...