Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Aqueous biphasic systems involving alkylsulfate-based ionic liquids

Deive, F. J.[Francisco J.], Rodriguez, A.[Ana], Marrucho, I. M.[Isabel M.], Rebelo, L. P. N.[Luis P. N.]
J. Chem. Thermodyn. 2011, 43, 11, 1565-1572
ABSTRACT
The specific effects of K3PO4, K2CO3, Na2CO3, and (NH4)2SO4, as high charge-density inorganic salts and thus inducers of the formation of aqueous biphasic systems (ABS) containing several ethyl-methylimidazolium alkylsulfate ionic liquids, C2MIM CnSO4 (n = 2, 4, 6, or 8), have been assessed at T = 298.15 K. The results are analyzed in the light of the Hofmeister series. The influence of different alkyl chain lengths in the anion, together with the ability of the selected inorganic salts to induce the formation of ABS, is discussed. Phase diagrams have been determined through turbidimetry, including tie lines assignments from mass phase ratios according to the lever arm rule. The Merchuck equation was satisfactorily used to correlate the solubility curve.
Compounds
# Formula Name
1 H2O water
2 K3O4P tripotassium phosphate
3 C8H16N2O4S 1-ethyl-3-methylimidazolium ethyl sulfate
4 CK2O3 potassium carbonate
5 CNa2O3 sodium carbonate
6 H8N2O4S ammonium sulfate
7 C12H24N2O4S 3-ethyl-1-methyl-1H-imidazolium hexyl sulfate
8 C10H20N2O4S 3-ethyl-1-methylimidazolium butyl sulfate
9 C14H28N2O4S 1-ethyl-3-methylimidazolium octyl sulfate
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
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 25
  • POMD
  • 1
  • 2
  • 3
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 4
  • 1
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 21
  • POMD
  • 4
  • 1
  • 3
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 5
  • 1
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 22
  • POMD
  • 5
  • 1
  • 3
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 1
  • POMD
  • 1
  • 6
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 6; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 18
  • POMD
  • 1
  • 6
  • 3
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 2
  • POMD
  • 1
  • 2
  • 7
  • Mass fraction - 7 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 29
  • POMD
  • 1
  • 2
  • 7
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 4
  • 1
  • 7
  • Mass fraction - 7 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 28
  • POMD
  • 4
  • 1
  • 7
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 5
  • 1
  • 7
  • Mass fraction - 7 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 27
  • POMD
  • 5
  • 1
  • 7
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 2
  • POMD
  • 1
  • 6
  • 7
  • Mass fraction - 7 ; Liquid mixture 1
  • Mass fraction - 6; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 28
  • POMD
  • 1
  • 6
  • 7
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 1
  • 2
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 16
  • POMD
  • 1
  • 2
  • 8
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 8 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 8; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 4
  • 1
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 16
  • POMD
  • 4
  • 1
  • 8
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 8 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 8; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 5
  • 1
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 19
  • POMD
  • 5
  • 1
  • 8
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 8; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 2
  • POMD
  • 1
  • 6
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 6; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 22
  • POMD
  • 1
  • 6
  • 8
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 8 ; Liquid mixture 2
  • Mass fraction - 8; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 1
  • 2
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 26
  • POMD
  • 1
  • 2
  • 9
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 9 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 9; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 4
  • 1
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 21
  • POMD
  • 4
  • 1
  • 9
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 9 ; Liquid mixture 2
  • Mass fraction - 9; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 2
  • POMD
  • 5
  • 1
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 29
  • POMD
  • 5
  • 1
  • 9
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 9 ; Liquid mixture 2
  • Mass fraction - 9; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 1
  • 6
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 6; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 28
  • POMD
  • 1
  • 6
  • 9
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 9 ; Liquid mixture 2
  • Mass fraction - 9; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 2