Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Determination and correlation of liquid-liquid equilibrium data for the dichloromethane + water + N, N-dimethylacetamide + NaCl system

Wang, C.[Chengxue], Liu, X.[Xiaojing]
Fluid Phase Equilib. 2015, 392, 43-48
ABSTRACT
The (liquid + liquid) equilibrium (LLE) data for the quaternary system dichloromethane (DCM) +water + N,N-Dimethylacetamide (DMAC)+NaCl have been determined at (298.15 and 308.15) K and atmospheric pressure. The experimental data were correlated by using Othmer-Tobias equation, and all the linear correlation coefficients were approximate to 1. Both NRTL and UNIQUAC models were adopted to correlate the LLE data, the model parameters were regressed by nonlinear least-squares method, then the LLE data of the quaternary system were calculated. The comparison between calculated and experimental data shows good agreement. The results show that the enlargement of two-phase region occurred with an increase of salt concentration in initial aqueous phase, and adding salt to the system is beneficial to increase the selectivity of solvent.
Compounds
# Formula Name
1 CH2Cl2 dichloromethane
2 C4H9NO N,N-dimethylethanamide
3 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
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 6
  • POMD
  • 1
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 6