Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Solubility, liquid-liquid equilibrium and critical states for the quaternary system formic acid - ethanol - ethyl formate - water at 298.15 K and 308.15 K

Trofimova, Maya, Sadaev, Alexey, Samarov, Artemiy, Toikka, Maria, Toikka, Alexander
Fluid Phase Equilib. 2019, 485, 111-119
ABSTRACT
Solubility, critical states and liquid-liquid equilibrium (LLE) in the quaternary reacting system formic acid - ethanol - ethyl formate - water and in the ternary subsystems formic acid - ethyl formate - water and ethanol - ethyl formate - water were studied experimentally at 298.15 K and 308.15 K and atmospheric pressure. Binodal curves, binodal surfaces, tie-lines and critical manifolds were determined. In order to construct binodal surfaces and critical curves of the quaternary system, five cutting planes with several different ratios of concentration of formic acid to ethanol were studied. Experimental LLE data were compared with the data calculated by NRTL model, and it was found that experimental and calculated data are in a good agreement.
Compounds
# Formula Name
1 C3H6O2 ethyl methanoate
2 CH2O2 formic acid
3 C2H6O ethanol
4 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
  • 3
  • 1
  • 4
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 37
  • POMD
  • 3
  • 1
  • 4
  • Mole fraction - 3 ; Liquid mixture 2
  • Mole fraction - 3 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • NMR
  • NMR
  • NMR
  • 14
  • POMD
  • 2
  • 1
  • 4
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • NMR
  • 29
  • POMD
  • 2
  • 1
  • 4
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • NMR
  • NMR
  • NMR
  • 10