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

Liquid Liquid Equilibria in Aqueous Mixtures of Alkylmethylimidazolium Glutamate with Potassium Carbonate and Some Physicochemical Properties of Aqueous [Cnmim][Glu] (n = 4, 6, 8) Solutions

Alopina, E. V.[Elena V.], Safonova, E. A.[Evgenia A.], Pukinsky, I. B.[Igor B.], Smirnova, N. A.[Natalia A.]
J. Chem. Eng. Data 2016, 61, 6, 2013-2019
ABSTRACT
Aqueous biphasic systems containing ionic liquids (ILs) attract rather high attention; in particular their application in liquid liquid extraction is very attractive due to the specificity of the systems and great possibilities in the modification of IL chemical structures. In the present work, a series of amino acid ionic liquids (AAILs) based on the 1-alkyl-3-methylimidazolium cation and l-glutamic acid anion [Cnmim][Glu] (n = 4, 6, 8) were synthesized. Densities, refractive indices, and specific electrical conductivities of aqueous solutions of these AAILs in the concentration range 0 70 wt % (for [C4mim][Glu] solutions up to 87 wt %) were measured at temperature 298.15 K and ambient pressure 0.1 MPa. The liquid liquid equilibria for ternary solutions [Cnmim][Glu] + salt (K2CO3) + water at 298.15 K were under study. In aqueous solutions of [C8mim][Glu] micellization is observed, whereas [C4mim][Glu] and [C6mim][Glu] in aqueous solutions form small ordinary aggregates. The critical micellar concentration for [C8mim][Glu] aqueous solutions at 298.15 K was estimated from the experimental data on the concentration dependence of the specific electrical conductivities of the solutions.
Compounds
# Formula Name
1 CK2O3 potassium carbonate
2 C13H23N3O4 1-butyl-3-methylimidazolium (S)-2-amino-4-carboxybutanoate
3 C15H27N3O4 1-hexyl-3-methylimidazolium L-glutamate
4 C17H31N3O4 1-methyl-3-octylimidazolium L-glutamate
5 C12H23ClN2 1-methyl-3-octylimidazolium chloride
6 C10H19ClN2 1-hexyl-3-methylimidazolium chloride
7 H2O water
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
  • 7
  • Mass density, kg/m3 ; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 7
  • Refractive index (Na D-line) ; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 1
  • POMD
  • 1
  • 7
  • 2
  • Mass fraction - 1 ; 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
  • 19
  • POMD
  • 1
  • 7
  • 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 4
  • POMD
  • 1
  • 7
  • 3
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 16
  • POMD
  • 1
  • 7
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 4
  • POMD
  • 1
  • 7
  • 4
  • Mass fraction - 1 ; 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
  • 16
  • POMD
  • 1
  • 7
  • 4
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 4
  • POMD
  • 7
  • 2
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Vibrating tube method
  • 12
  • POMD
  • 7
  • 2
  • Refractive index (Na D-line) ; Liquid
  • Mass fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 8
  • POMD
  • 7
  • 2
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 12
  • POMD
  • 7
  • 3
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Vibrating tube method
  • 10
  • POMD
  • 7
  • 3
  • Refractive index (Na D-line) ; Liquid
  • Mass fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 9
  • POMD
  • 7
  • 3
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 12
  • POMD
  • 7
  • 4
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 4; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Vibrating tube method
  • 9
  • POMD
  • 7
  • 4
  • Refractive index (Na D-line) ; Liquid
  • Mass fraction - 4; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 9
  • POMD
  • 7
  • 4
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 4; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 12
  • POMD
  • 7
  • 5
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 5; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 13
  • POMD
  • 1
  • 7
  • 6
  • Mass fraction - 1 ; 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
  • 14