Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid), (solid + liquid), and (solid + liquid + liquid) equilibria of systems containing cyclic ether (tetrahydrofuran or 1,3-dioxolane), water, and a biological buffer MOPS

Altway, S.[Saidah], Taha, M.[Mohamed], Lee, M.-J.[Ming-Jer]
J. Chem. Thermodyn. 2015, 82, 93-98
ABSTRACT
Two liquid phases were formed as the addition of a certain amount of biological buffer 3-(N-morpholino) propane sulfonic acid (MOPS) in the aqueous solutions of tetrahydrofuran (THF) or 1,3-dioxolane. To evaluate the feasibility of recovering the cyclic ethers from their aqueous solutions with the aid of MOPS, we determined experimentally the phase diagrams of the ternary systems of {cyclic ether (THF or 1,3-dioxolane) + water + MOPS} at T = 298.15 K under atmospheric pressure. In this study, the solubility data of MOPS in water and in the mixed solvents of water/cyclic ethers were obtained from the results of a series of density measurements, while the (liquid + liquid) and the (solid + liquid + liquid) phase boundaries were determined by visually inspection. Additionally, the tie-line results for (liquid + liquid) equilibrium (LLE) and for (solid + liquid + liquid) equilibrium (SLLE) were measured using an analytical method. The reliability of the experimental LLE tie-line results data was validated by using the Othmer Tobias correlation. These LLE tie-line values were correlated well with the NRTL model. The phase diagrams obtained from this study reveal that MOPS is a feasible green auxiliary agent to recover the cyclic ethers from their aqueous solutions, especially for 1,3-dioxolane.
Compounds
# Formula Name
1 C7H15NO4S 4-morpholinepropanesulfonic acid
2 C4H8O tetrahydrofuran
3 C3H6O2 1,3-dioxolane
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
  • 2
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • gravimetric method
  • 6
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 1 ; Liquid
  • Mass fraction - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • from the plateau on the density curve
  • 2
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Crystal - 1
  • Chromatography
  • 1
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Crystal - 1
  • gravimetric method
  • 1
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Crystal - 1
  • Chromatography
  • 1
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Crystal - 1
  • gravimetric method
  • 1
  • POMD
  • 2
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Gravimetric method
  • Gravimetric method
  • Gravimetric method
  • 7
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • gravimetric method
  • 7
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 1 ; Liquid
  • Mass fraction - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • from the plateau on the density curve
  • 3
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Crystal - 1
  • Liquid mixture 2
  • Chromatography
  • 1
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Crystal - 1
  • Liquid mixture 2
  • gravimetric method
  • 1
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Crystal - 1
  • Liquid mixture 1
  • Chromatography
  • 1
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Crystal - 1
  • Liquid mixture 1
  • gravimetric method
  • 1
  • POMD
  • 3
  • 1
  • 4
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Gravimetric method
  • Gravimetric method
  • Gravimetric method
  • 7
  • POMD
  • 1
  • 4
  • Mass fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • from the plateau on the density curve
  • 1