Abstract
Isobaric vapor–liquid equilibrium (VLE) data for methanol–methyl ethyl ketone (MEK) systems containing ionic liquids (ILs) have been measured with a modified Othmer still at atmospheric pressure (101.32 kPa), and they were correlated by the NRTL equation. Three ILs, composed of an anion tetrafluoroborate ([BF4]−) and a cation from 1-ethyl-3-methylimidazolium ([EMIM]+), over 1-butyl-3-methylimidazolium ([BMIM]+), to 1-octyl-3-methylimidazolium ([OMIM]+), were investigated, and they all gave rise to a change of the relative volatility of methanol to MEK. The results indicated that, among the three ILs studied, [BMIM]+[BF4]− and [OMIM]+[BF4]− eliminated the azeotropic point at mole fraction 30 % and 10 %, respectively, whereas IL [EMIM]+[BF4]− pulled down the azeotropic point. The influence of the variation of the cation’s alkyl chain length of imidazolium tetrafluoroborate-based ILs on VLE of the azeotropic system methanol–MEK was discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
