Isothermal vapor–liquid equilibrium and excess molar enthalpies of the binary mixtures furfural + methyl isobutyl ketone, +2-butanol and +2-methyl-2-butanol

Isothermal vapor–liquid equilibria (VLE) of the binary mixture of furfural + methyl isobutyl ketone (MIBK), furfural + 2-butanol and furfural + 2-methyl-2-butanol were measured at 333, 346 and 353 K with three equipment: a static total pressure apparatus, a recirculation still apparatus and a gas chromatograph connected to a headspace sampler (HS–GC). Excess molar enthalpy (hE) was measured for the three binary mixtures at 298.15 K by using a SETARAM C80 calorimeter equipped with a flow mixing cell. Gas chromatography–mass spectrometry was employed for the analysis of furfural impurities. A comprehensive consistency analysis was performed for the obtained data. The experimental data were correlated with the NRTL, UNIQUAC and Wilson activity coefficient models. The results were compared with the UNIFAC-Dortmund and COSMO-RS predictive models. All investigated mixtures show positive deviation from Raoultʹs law.