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

Mutual Solubilities of Cyclohexane and Water in Aqueous Methyldiethanolamine /Cyclohexane Liquid-Liquid Equilibria

Danon, Rana, Kroon, Maaike C., Banat, Fawzi
J. Chem. Eng. Data 2018, 63, 4, 1123-1131
ABSTRACT
The aim of this work is to study the solubility of cyclohexane in aqueous MDEA solutions. Thermostated jacketed double glass equilibrium cells were used to measure the mutual solubility between two liquid phases of aqueous MDEA and cyclohexane at 298- 318 K under atmospheric pressure. The cyclohexane solubility in the aqueous liquid samples was analyzed using GC-MS coupled with purge and trap technique, while that of water in the cyclohexane-rich phase was measured via the Karl- Fischer titration method. It was observed that the solubility of cyclohexane in the aqueous phase increases with increasing temperature. Furthermore, an increase in amine composition, increases the solubility of cyclohexane. The mutual water solubility in the cyclohexane-rich phase increases rapidly with increasing temperature while it was rather non-sensitive towards the amine composition. A simple correlation for the salting- in ratio has been used that allows for a direct comparison between the solubilities of cyclohexane in aqueous solutions of MDEA to those in pure water at various temperatures.
Compounds
# Formula Name
1 C6H12 cyclohexane
2 C5H13NO2 N-methyldiethanolamine
3 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
  • 2
  • 3
  • 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
  • Chromatography
  • 1
  • POMD
  • 1
  • 2
  • 3
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mole fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • Chromatography
  • Chromatography
  • 13
  • POMD
  • 1
  • 3
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • 1
  • POMD
  • 1
  • 3
  • Mole fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • 1