Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

The role of organic diluents in the aspects of equilibrium, kinetics and thermodynamic model for silver ion extraction using an extractant D2EHPA

Wongsawa, T.[Thidarat], Sunsandee, N.[Niti], Lothongkum, A. W.[Anchaleeporn Waritswat], Pancharoen, U.[Ura], Phatanasri, S.[Suphot]
Fluid Phase Equilib. 2015, 388, 22-30
ABSTRACT
The effects of organic diluents regarding the aspects of equilibrium data, kinetics of extraction behavior and thermodynamic model are of great importance in the extraction processes. Therefore, these effects were investigated for silver ion extraction by a liquid liquid extraction process using D2EHPA as an extractant. Various organic diluents that have different dielectric constants like kerosene, cyclohexane, chloroform and 1-octanol were selected for use in this work. The equilibrium data of solubility and tie-lines for the ternary systems of water + D2EHPA + organic diluents exhibited type-2 LLE behavior at a temperature of 298.2 K and atmospheric pressure. Moreover, the uncertainty propagation calculation was determined to validate the reliability of the data. The extraction efficiency of silver ions for each organic diluent was also investigated; maximum extraction of 94% was obtained for 1-octanol. The extraction behaviors of silver ion with D2EHPA in the different organic diluents were reported as regards their reaction stoichiometry. They were also analyzed by spectroscopic analysis. Results of the thermodynamic NRTL model were obtained and a very good correlation with the experimental LLE data was confirmed by the root-mean square deviation (rmsd) values of 1%.
Compounds
# Formula Name
1 H2O water
2 C16H35O4P bis(2-ethylhexyl) hydrogen phosphate
3 C6H12 cyclohexane
4 CHCl3 trichloromethane
5 C8H18O octan-1-ol
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
  • Normal boiling temperature, K ; Liquid
  • Liquid
  • Gas
  • DSC
  • 1
  • POMD
  • 3
  • Normal boiling temperature, K ; Liquid
  • Liquid
  • Gas
  • Distillation
  • 1
  • POMD
  • 4
  • Normal boiling temperature, K ; Liquid
  • Liquid
  • Gas
  • Distillation
  • 1
  • POMD
  • 5
  • Normal boiling temperature, K ; Liquid
  • Liquid
  • Gas
  • Distillation
  • 1
  • POMD
  • 2
  • 1
  • Mass ratio of solute to solvent - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 2
  • POMD
  • 3
  • 1
  • Mass ratio of solute to solvent - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 3
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 2
  • POMD
  • 4
  • 1
  • Mass ratio of solute to solvent - 4 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 4
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 2
  • POMD
  • 5
  • 1
  • Mass ratio of solute to solvent - 5 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 5
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 2
  • POMD
  • 3
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 13
  • POMD
  • 3
  • 2
  • 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • FT-IR
  • FT-IR
  • FT-IR
  • 10
  • POMD
  • 4
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 13
  • POMD
  • 4
  • 2
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2 ; 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
  • FT-IR
  • FT-IR
  • FT-IR
  • 10
  • POMD
  • 5
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 13
  • POMD
  • 5
  • 2
  • 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2 ; 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
  • FT-IR
  • FT-IR
  • FT-IR
  • 10