Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Co-solvent effects in LLE of 1-hydroxyethyl-3-methylimidazolium based ionic liquids + 2-propanol + dichloromethane or 1,2-dichloroethane

Najdanovic-Visak, V.[Vesna], Rodriguez, A., Visak, Z. P.[Zoran P.], Rosa, J. N.[Joao N.], Afonso, C. A. M.[Carlos A.M.], Nunes da Ponte, M.[Manuel], Rebelo, L. P. N.[Luis Paulo N.]
Fluid Phase Equilib. 2007, 254, 1-2, 35-41
ABSTRACT
Several regimes of the (T, x1, x2) surface of the liquid liquid phase diagram at or close to a nominal pressure of 0.1MPa of the ternary systems 1-hydroxyethyl-3-methylimidazolium based ionic liquids (1), [C2OHmim][X] ([X] = [PF6]- or [BF4]- or [CF3SO3]- or [(CF3SO2)2N]-), +dichloromethane or 1,2-dichloroethane (2), +2-propanol (3) were investigated. For the first time, phase splitting in a (IL + dichloromethane) system was found and the related temperature composition phase diagrams for all aforementioned ILs were determined. In the case of 2-propanol, partial miscibility was observed only for ILs containing the [PF6]- and [BF4]- anions. When the latter are involved in ternary systems, the ternary phase diagrams at ambient conditions show wide areas of total miscibility, thus revealing an unexpected and large co-solvent effect. For the ternary mixture ([C2OHmim][PF6] + dichloromethane + 2-propanol), a moderate pressure effect on the cloud point with a negative pressure temperature slope was detected.
Compounds
# Formula Name
1 C6H11F6N2OP 3-(2-hydroxyethyl)-1-methylimidazolium hexafluorophosphate
2 C6H11BF4N2O 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate
3 C7H11F3N2O4S 3-(2-hydroxyethyl)-1-methylimidazolium 1,1,1-trifluoromethanesulfonate
4 C8H11F6N3O5S2 1-(2-hydroxyethyl)-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
5 CH2Cl2 dichloromethane
6 C2H4Cl2 1,2-dichloroethane
7 C3H8O propan-2-ol
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
  • 5
  • 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 1
  • POMD
  • 5
  • 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • 1
  • POMD
  • 5
  • 2
  • Mole fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 1
  • POMD
  • 5
  • 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • 1
  • POMD
  • 5
  • 3
  • Mole fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 2
  • POMD
  • 5
  • 3
  • Mole fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • 2
  • POMD
  • 5
  • 4
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS
  • 11
  • POMD
  • 7
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Solvent: Mole fraction - 5; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS
  • 9
  • POMD
  • 7
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Mole fraction - 5; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS
  • 5
  • POMD
  • 7
  • 5
  • 1
  • Mole fraction - 5 ; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 25
  • POMD
  • 7
  • 5
  • 2
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Solvent: Mole fraction - 5; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS
  • 12
  • POMD
  • 7
  • 5
  • 2
  • Mole fraction - 5 ; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 17
  • POMD
  • 7
  • 5
  • 3
  • Mole fraction - 5 ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 9
  • POMD
  • 7
  • 5
  • 4
  • Mole fraction - 5 ; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 6
  • POMD
  • 7
  • 6
  • 3
  • Mole fraction - 6 ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 8
  • POMD
  • 7
  • 6
  • 4
  • Mole fraction - 6 ; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 6