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

Salting Effect of Sodium Hydroxide and Sodium Formate on the Liquid-Liquid Equilibrium of Polyoxymethylene Dimethyl Ethers in Aqueous Solution

Liu, Y.[Yang], Wang, Y.[Yan], Cai, W.[Wangfeng]
J. Chem. Eng. Data 2019, 64, 6, 2578-2592
ABSTRACT
In this work the salting effect of sodium hydroxide (NaOH) and sodium formate (HCOONa) on the liquid-liquid equilibrium (LLE) of polyoxymethylene dimethyl ethers (DMMn) in aqueous solution were studied. The LLE data of the systems (DMM1 + water) and (DMM2 + water), and the system (DMM1 + water + DMM2) under different concentrations of NaOH and HCOONa at 293.15 K and 308.15 K were measured. According to the verification with the Marcilla-modified Eisen-Joffe equation, the experimental data has good consistency. Distribution coefficients were calculated and compared, and the results showed that NaOH and HCOONa have a significant salting-out effect on DMMn and water separation. Based on the experimental LLE data, the original NRTL (Non-Random Two Liquid) and the electrolyte NRTL activity coefficient models were correlated by the maximumlikelihood principle, which showed that the electrolyte NRTL model was more appropriate. The experimental data and the binary interaction parameters could provide a useful reference for DMMn products reaction extraction before rectification.
Compounds
# Formula Name
1 C3H8O2 dimethoxymethane
2 C4H10O3 2,4,6-trioxaheptane
3 HNaO sodium hydroxide
4 CHNaO2 sodium methanoate
5 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
  • 5
  • 4
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 24
  • POMD
  • 1
  • 5
  • 3
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 18
  • POMD
  • 2
  • 5
  • 4
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 22
  • POMD
  • 2
  • 5
  • 3
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 18
  • POMD
  • 1
  • 2
  • 5
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 1 ; 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
  • OTHER
  • OTHER
  • OTHER
  • 4
  • POMD
  • 1
  • 5
  • Mass fraction - 5 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • 4
  • POMD
  • 1
  • 5
  • Mass fraction - 5 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • 4
  • POMD
  • 2
  • 5
  • Mass fraction - 5 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • 4
  • POMD
  • 2
  • 5
  • Mass fraction - 5 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • 4