Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Enhancement of liquid phase splitting of water + ethanol + ethyl acetate mixtures in the presence of a hydrophilic agent or an electrolyte substance

Lin, H. M.[Ho-Mu], Yeh, C.-E.[Chih-En], Hong, G.-B.[Gui-Bing], Lee, M.-J.[Ming-Jer]
Fluid Phase Equilib. 2005, 237, 1-2, 21-30
ABSTRACT
The enhancement of phase splittingwas investigated for the liquid mixtures ofwater + ethanol + ethyl acetate in the presence of a hydrophilic agent (glycerol) or an electrolyte compound (potassium acetate, KAc, or calcium chloride, CaCl2). The liquid-liquid equilibrium (LLE) properties were measured for ternary systems ofwater + ethanol + ethyl acetate andwater + ethyl acetate + CaCl2, and three quaternary systems, including water + ethanol + ethyl acetate + auxiliary agent (glycerol, potassium acetate, or calcium chloride), at temperatures ranging from 283.15Kto 313.15 K. The region of heterogeneitywas found to increase as one of the auxiliary agentswas introduced into the aqueous mixtures. By adding the same percentage of auxiliary agents, the magnitudes of phase-splitting enhancement follow the order of CaCl2 > KAc > glycerol. The Electrolyte-NRTL modelwas used to correlate the newLLE data for the investigated mixtures. In general, the model reproduces reasonably for the LLE phase envelops.
Compounds
# Formula Name
1 H2O water
2 C2H6O ethanol
3 C4H8O2 ethyl acetate
4 CaCl2 calcium chloride
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
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • CHROM:UFactor:2
  • 3
  • POMD
  • 3
  • 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • CHROM:UFactor:2
  • 3
  • POMD
  • 2
  • 3
  • 1
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Mole fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • CHROM:UFactor:2
  • CHROM:UFactor:2
  • CHROM:UFactor:2
  • 21
  • POMD
  • 3
  • 1
  • 4
  • Mole fraction - 3 ; Liquid mixture 2
  • Mole fraction - 3 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • CHROM:UFactor:2
  • CHROM:UFactor:2
  • CHROM:UFactor:2
  • 5