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

Aqueous Biphasic Systems of Pyrrolidinium Ionic Liquids with Organic Acid-Derived Anions and K3PO4

Joao, K. G.[Karen G.], Tome, L. C.[Liliana C.], Gouveia, A. S. L.[Andreia S.L.], Marrucho, I. M.[Isabel M.]
J. Chem. Eng. Data 2017, 62, 4, 1182-1188
ABSTRACT
Aqueous biphasic systems based on ionic liquids (ILs) have been researched as promising extraction and purification routes for a huge diversity of compounds. The inherent tunability offered by ILs combined with the large variety of salts available underlines the reliable phase equilibrium data. In this vein, this work presents novel aqueous biphasic systems based on the 1-butyl-1-methylpyrrolidinium cation combined with anions derived from organic acids, such as acetate, trifluoroacetate, hexanoate, adipate, and one halogenated anion, bromide, in the presence of a powerful salting out species, the inorganic salt K3PO4. The capacity of these ILs to undergo phase separation is discussed in regard to the chemical structure of the IL anion. The results here obtained were compared with those determined for poly(ionic liquid) analogues, and it was observed that while in ILs the hydrophobicity of the anion has the major role in phase splitting, in poly(ionic liquid)s that role is played by the polymer molecular weight. The effect of temperature on the phase equilibria is addressed.
Compounds
# Formula Name
1 K3O4P tripotassium phosphate
2 H2O water
3 C9H19NO2 1-ethyl-1-methylpyrrolidinium acetate
4 C9H16F3NO2 1-ethyl-1-methylpyrrolidinium trifluoroacetate
5 C13H27NO2 1-ethyl-1-methylpyrrolidinium hexanoate
6 C13H25NO4 1-ethyl-1-methylpyrrolidinium hydrogen adipate
7 C7H16BrN 1-ethyl-1-methylpyrrolidinium bromide
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
  • 2
  • 1
  • 3
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 19
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 1 ; 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
  • Titration method
  • 29
  • POMD
  • 5
  • 2
  • 1
  • Mass fraction - 1 ; 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
  • Titration method
  • 21
  • POMD
  • 6
  • 2
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 6; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 7
  • POMD
  • 2
  • 1
  • 7
  • Mass fraction - 1 ; 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
  • Titration method
  • 23