Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid) equilibria for ternary mixtures of (methanol or ethanol + toluene or m-xylene + n-dodecane)

Mohsen-Nia, M., Modarress, H.[Hamid], Doulabi, F.
J. Chem. Thermodyn. 2006, 38, 2, 158-164
ABSTRACT
(Liquid + liquid) equilibrium (LLE) results for the ternary mixtures of (methanol or ethanol + toluene or m-xylene + n-dodecane) at three temperatures (298.15, 303.15 and 313.15) K are reported. The compositions of liquid phases at equilibrium were determined by g.l.c. measurements and the results were correlated with the UNIQUAC and NRTL activity coefficient models. The partition coefficients and the selectivity factor of methanol and ethanol are calculated and compared to suggest which alcohol is more suitable for extracting the aromatic hydrocarbons (toluene or m-xylene) from n-dodecane. The phase diagrams for the ternary mixtures including both the experimental and correlated tie lines are presented. From the phase diagrams and the selectivity factors it is concluded that methanol has a higher efficiency as a solvent in extraction of aromatic hydrocarbon from alkane mixtures.
Compounds
# Formula Name
1 CH4O methanol
2 C2H6O ethanol
3 C12H26 dodecane
4 C7H8 toluene
5 C8H10 1,3-dimethylbenzene
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
  • 3
  • Mole fraction - 4 ; Liquid mixture 1
  • Mole fraction - 4 ; Liquid mixture 2
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mole fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • CHROM:UFactor:24
  • CHROM:UFactor:24
  • CHROM:UFactor:24
  • 15
  • POMD
  • 1
  • 5
  • 3
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 5 ; Liquid mixture 2
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • CHROM:UFactor:8
  • CHROM:UFactor:8
  • CHROM:UFactor:8
  • 15
  • POMD
  • 2
  • 4
  • 3
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 4 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • CHROM:UFactor:12
  • CHROM:UFactor:12
  • CHROM:UFactor:12
  • 15
  • POMD
  • 2
  • 5
  • 3
  • Mole fraction - 5 ; Liquid mixture 2
  • Mole fraction - 5 ; Liquid mixture 1
  • Mole fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • CHROM:UFactor:12
  • CHROM:UFactor:12
  • CHROM:UFactor:12
  • 15