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Vapor Liquid Equilibria for Ionic Liquid/Ethanol/Water Systems and the Effect of Anion Hydrolysis
Author(s) -
Faghihi Erfaneh,
Mokhtarani Babak,
Mortaheb Hamid Reza,
Heydar Kourosh Tabar,
Mirzaei Mojtaba,
Sharifi Ali
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000114
Subject(s) - tetrafluoroborate , ionic liquid , chemistry , hydrolysis , ethanol , inorganic chemistry , dehydration , isobaric process , organic chemistry , thermodynamics , catalysis , biochemistry , physics
Abstract The performance of two tetrafluoroborate‐based ionic liquids (ILs) as entrainers in the dehydration of water/ethanol azeotropic mixtures was evaluated. Isobaric vapor‐liquid equilibrium (VLE) data were measured for the systems ethanol/water/1‐butyl‐3‐methyl imidazolium tetrafluoroborate and ethanol/water / n ‐butylpyridinium tetrafluoroborate including the azeotropic region. VLE data for the ethanol/water, ethanol/IL, and water/IL binary mixtures were obtained at 100 kPa. The hydrolysis of the tetrafluoroborate anion was studied for both types of ILs by 19 F NMR analysis. The hydrolysis of the tetrafluoroborate anion does not have much effect on the ethanol/water VLE. The 19 F NMR analysis indicated that hydrolysis occurred at high mole fractions of water.