Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Influence of the alkyl group on thermophysical properties of carboxylic acids in 1-butyl-3-methylimidazolium thiocyanate ionic liquid at various temperatures

Singh, S., Bahadur, I., Redhi, G. G.[Gan. G.], Ebenso, E. E.[Eno E.], Ramjugernath, D.
J. Chem. Thermodyn. 2015, 89, 104-111
ABSTRACT
In the present study, influence of the alkyl group and temperature on the interactions between the carboxylic acid and ionic liquid (IL) mixtures were discussed in term of density and sound velocity measurements. The IL used in this study was 1-butyl-3-methylimidazolium thiocyanate ([BMIM]+[SCN] ). The density (q), and sound velocity (u), of the IL, acetic acid, propionic acid, and their corresponding binary systems {[BMIM]+[SCN] (x1) + acetic or propionic acid (x2)} have been measured at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K and at p = 0.1 MPa. The excess molar volumes, VE m, isentropic compressibility, js, and deviation in isentropic compressibility, Djs, were calculated using experimental density and sound velocity data, respectively. The Redlich Kister polynomial equation was used to fit the excess/deviation properties. These results are useful for describing the intermolecular interactions that exist between the IL and carboxylic acid mixtures.
Compounds
# Formula Name
1 C2H4O2 acetic acid
2 C3H6O2 propanoic acid
3 C9H15N3S 1-butyl-3-methylimidazolium thiocyanate
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
  • 3
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 60
  • POMD
  • 1
  • 3
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Frequency, MHz; Liquid
  • Liquid
  • Sing-around technique in a fixed-path interferometer
  • 60
  • POMD
  • 2
  • 3
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 60
  • POMD
  • 2
  • 3
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Frequency, MHz; Liquid
  • Liquid
  • Sing-around technique in a fixed-path interferometer
  • 60