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

Equilibrium Data for Aqueous Two-Phase Systems Formed by Ionic Liquid (1-Butyl-3-methylimidazolium Methanesulfonate, 1-Butyl-3-methylimidazolium Chloride, and 1-Ethyl-3-methylimidazolium Chloride) and Inorganic Salts (Dibasic Potassium Phosphate and Tripotassium Phosphate) at 298.15 K

Calhau, P. H. S.[Pedro Henrique Silva], de Sousa, R. d. C. S.[Rita de Cassia Superbi], Santos, I. J. B.[Igor Jose Boggione], Silva, S. M.[Simone Monteiro], Coimbra, J. S. d. R.[Jane Selia dos Reis]
J. Chem. Eng. Data 2019, 64, 9, 3781-3785
ABSTRACT
Equilibrium data were obtained for aqueous two-phase systems composed of ionic liquid (IL) and two inorganic salts (dibasic potassium phosphate, K2HPO4, and tripotassium phosphate, K3PO4), at 298.15 K. The evaluated ionic liquids were 1-butyl-3methylimidazolium methanesulfonate ([C4mim][CH3SO3]), 1-butyl-3-methylimidazolium chloride ([C4mim][Cl]), and 1-ethyl-3-methylimidazolium chloride ([C2mim][Cl]). The equilibrium curve and three tie-lines for each combination of salt and ionic liquid were determined. Additionally, each curve was fitted into three mathematical models. The ATPS composed with the IL [C2mim][Cl] required a lower mass fraction of IL and salt to form the systems than the other two systems studied in this work containing [C4mim][Cl] and [C4mim][CH3SO3]. Furthermore, the studied type of inorganic salts did not affect the equilibrium curves for the same ionic liquid.
Compounds
# Formula Name
1 C6H11ClN2 1-ethyl-3-methylimidazolium chloride
2 C8H15ClN2 1-butyl-3-methylimidazolium chloride
3 C9H18N2O3S 1-butyl-3-methylimidazolium methanesulfonate
4 K3O4P tripotassium phosphate
5 HK2O4P dipotassium hydrogen phosphate
6 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
  • 1
  • 4
  • 6
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 24
  • POMD
  • 1
  • 5
  • 6
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 20
  • POMD
  • 2
  • 4
  • 6
  • Mass fraction - 4 ; 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
  • 31
  • POMD
  • 2
  • 5
  • 6
  • Mass fraction - 5 ; 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
  • 19
  • POMD
  • 3
  • 4
  • 6
  • Mass fraction - 4 ; 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 method
  • 24
  • POMD
  • 3
  • 5
  • 6
  • Mass fraction - 5 ; 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 method
  • 20