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

Liquid-Liquid Equilibria in Binary Mixtures of Water with Malonitrile, Succinonitrile, and Glutaronitrile

Ashtari, K.[Khadijeh], Alizadeh, N.[Naader]
J. Chem. Eng. Data 2004, 49, 6, 1752-1755
ABSTRACT
Liquid-liquid equilibria of binary mixtures of water and dinitrile solvents malononitrile, succinonitrile, and glutraronitrile have been studied in temperature range of 15 to 70 C. The phase diagrams show that the critical mole fraction and consolate temperature (C) (xc, Tc) are (0.25, 58) for malononitrile and (0.19, 56) and (0.12, 68) for succinonitrile and glutraronitrile, respectively. The nonrandom two-liquid (NRTL) equation has been used to correlate of the activity coefficients of the components in binary mixtures. The parameters needed for the calculation are the energy parameters (g12 - g22) and (g21 - g11) and the nonrandom parameter, which are determined by solving the NRTL equation with the aid of a nonlinear least-squares curve-fitting program. From the parameters of this equation, the excess Gibbs energies were calculated. Good agreement between the experimental data of phase diagrams and model results was achieved.
Compounds
# Formula Name
1 H2O water
2 C3H2N2 propanedinitrile
3 C4H4N2 butanedinitrile
4 C5H6N2 pentanedinitrile
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
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • 28
  • POMD
  • 3
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • 24
  • POMD
  • 4
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • 42