Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Liquid-Liquid Equilibria of Aqueous Biphasic Systems Containing Selected Imidazolium Ionic Liquids and Salts

Pei, Y.[Yuanchao], Wang, J.[Jianji], Liu, L.[Li], Wu, K.[Kun], Zhao, Y.[Yang]
J. Chem. Eng. Data 2007, 52, 5, 2026-2031
ABSTRACT
Liquid-liquid equilibrium data have been determined for imidazolium ionic liquid ([C4mim]Cl, [C6mim]Cl, [C4mim]Br, [C6mim]Br, [C8mim]Br, [C10mim]Br) + salt (KOH, K2HPO4, K2CO3, K3PO4) aqueous biphasic systems at T = 298.15 K, and in part at T = (308.15 to 318.15) K. Factors affecting the binodal curves such as nature of ionic liquids and salts and temperature are also studied. The binodal curves are fitted to a three-parameter equation, and the tie-lines were described by the Othmer-Tobias and Bancroft equations. It is found that an increase in temperature caused no significant expansion of the two-phase area. However, the binodal curves became more close to the origin with an increase in alkyl chain length of the ionic liquids (ILs), and the ionic liquids with the Br- anion are easier to form two phases compared to those with the Cl- anion. These data are expected to be useful for the development and design of the extraction process using ILs based on aqueous biphasic systems.
Compounds
# Formula Name
1 H2O water
2 K3O4P tripotassium phosphate
3 C8H15BrN2 1-butyl-3-methylimidazolium bromide
4 CK2O3 potassium carbonate
5 HKO potassium hydroxide
6 C10H19BrN2 3-hexyl-1-methyl-1H-imidazolium bromide
7 HK2O4P dipotassium hydrogen phosphate
8 C12H23BrN2 1-methyl-3-octylimidazolium bromide
9 C14H27BrN2 1-decyl-3-methylimidazolium bromide
10 C10H19ClN2 1-hexyl-3-methylimidazolium chloride
11 C8H15ClN2 1-butyl-3-methylimidazolium chloride
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
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 18
  • POMD
  • 4
  • 1
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 19
  • POMD
  • 5
  • 1
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 18
  • POMD
  • 1
  • 2
  • 6
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 1
  • 7
  • 6
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 19
  • POMD
  • 1
  • 7
  • 6
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Spectra
  • Spectra
  • Spectra
  • 13
  • POMD
  • 4
  • 1
  • 6
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 5
  • 1
  • 6
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 1
  • 2
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 1
  • 7
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 19
  • POMD
  • 1
  • 7
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 8 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • spectra
  • spectra
  • spectra
  • 11
  • POMD
  • 4
  • 1
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 5
  • 1
  • 8
  • Mass fraction - 8 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 16
  • POMD
  • 1
  • 7
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 4
  • 1
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 24
  • POMD
  • 5
  • 1
  • 9
  • Mass fraction - 9 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 24
  • POMD
  • 1
  • 2
  • 10
  • Mass fraction - 10 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 19
  • POMD
  • 1
  • 7
  • 10
  • Mass fraction - 10 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 18
  • POMD
  • 4
  • 1
  • 10
  • Mass fraction - 10 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 20
  • POMD
  • 5
  • 1
  • 10
  • Mass fraction - 10 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 18
  • POMD
  • 1
  • 7
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • TITR:UFactor:2
  • 47
  • POMD
  • 1
  • 7
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • spectra
  • spectra
  • spectra
  • 11
  • POMD
  • 1
  • 7
  • 11
  • Mass fraction - 7 ; Liquid mixture 2
  • Mass fraction - 11 ; Liquid mixture 1
  • Mass fraction - 7 ; Liquid mixture 1
  • Mass fraction - 11; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • spectra
  • spectra
  • spectra
  • 9