Thermodynamics Research Center, ThermoML : Journal of Chemical Thermodynamics

Isobaric vapor-liquid equilibria for the extractive distillation of tert-butyl alcohol + water mixtures using 1-ethyl-3-methylimidazolium dicyanamide ionic liquid

Orchilles, A. Vicent, Vercher, Ernesto, Miguel, Pablo J., Gonzalez-Alfaro, Vicenta, Llopis, Francisco J.
J. Chem. Thermodyn. 2019, 139, 105866
ABSTRACT
Isobaric vapor-liquid equilibria for the binary systems tert-butyl alcohol + water, and tert-butyl alcohol + 1-ethyl-3-methylimidazolium dicyanamide ([emim][DCA]), as well as the vapor-liquid equilibria for the tert-butyl alcohol + water + [emim][DCA] ternary system, have been obtained at 100 kPa using a recirculating still. The electrolyte nonrandom two-liquid (e-NRTL) model was successfully used for fitting the experimental data. The effect of [emim][DCA] on the tert-butyl alcohol + water system has been compared with that produced by other ionic liquids reported in the literature. From the results, [emim][DCA] appears as a good entrainer for the extractive distillation of this solvent mixture, causing the azeotrope to disappear at 100 kPa when the ionic liquid mole fraction is greater than0.095.
Compounds
# Formula Name
1 C4H10O 2-methylpropan-2-ol
2 H2O water
3 C8H11N5 1-ethyl-3-methylimidazolium dicyanamide
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 1
  • POMD
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 1
  • POMD
  • 1
  • 2
  • Boiling temperature at pressure P, K ; Liquid
  • Mole fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 31
  • POMD
  • 1
  • 2
  • Mole fraction - 1 ; Gas
  • Mole fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Gas
  • Liquid
  • Chromatography
  • 31
  • POMD
  • 1
  • 3
  • Boiling temperature at pressure P, K ; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 31
  • POMD
  • 1
  • 3
  • 2
  • Mole fraction - 2 ; Liquid
  • Mole fraction - 2 ; Gas
  • Mole fraction - 1 ; Gas
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Chromatography
  • Chromatography
  • Chromatography
  • 95
  • POMD
  • 3
  • 2
  • Boiling temperature at pressure P, K ; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 5