Thermodynamics Research Center, ThermoML : Journal of Chemical and Engineering Data

Experimental and Correlated Liquid-Liquid Equilibrium Data for Ternary Systems (Water + Poly(oxymethylene) Dimethyl Ethers + Toluene) at T = 293.15 and 303.15 K and p = 101.3 kPa

Li, X.[Xiangjun], Cao, J.[Jiancheng], Nawaz, M. A.[Muhammad Asif], Hu, Y.[Yantao], Liu, D.[Dianhua]
J. Chem. Eng. Data 2019, 64, 12, 5548-5557
ABSTRACT
Polyoxymethylene dimethyl ethers (PODEn) are appealing additives for diesel fuels. Nowadays, the research on PODEn synthesis is much crucial and essential, while the separation of PODEn from aqueous systems also has great significance for the production of PODEn in industry. In this work, ternary liquid-liquid equilibrium (LLE) data for the mixtures of (water + PODE1 + toluene), (water + PODE2 + toluene), (water + PODE3 + toluene), and (water + PODE4 + toluene) were determined at T = (293.15 and 303.15) K and p = 101.3 kPa. The consistency of experimental LLE data was evaluated by Hand and Othmer-Tobias equations. The distribution coefficients and separation factors were employed to assess the efficiency of extracting PODE1-4 from water. The experimental tie-line data of the studied systems was correlated using the NRTL and UNIQUAC activity coefficient models, and the corresponding binary interaction parameters were obtained and the results indicated that the UNIQUAC model gives a better agreement. All the data demonstrated that toluene was ideal extractant for separating PODE1-4 from aqueous solution.
Compounds
# Formula Name
1 C7H8 toluene
2 C3H8O2 dimethoxymethane
3 C4H10O3 2,4,6-trioxaheptane
4 C5H12O4 2,4,6,8-tetraoxanonane
5 C6H14O5 2,4,6,8,10-pentaoxaundecane
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
  • 6
  • 2
  • 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 12
  • POMD
  • 6
  • 3
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • Chromatography
  • Chromatography
  • 12
  • POMD
  • 6
  • 4
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • Chromatography
  • Chromatography
  • 12
  • POMD
  • 6
  • 5
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 5 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • Chromatography
  • Chromatography
  • 12