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

Solubilities and Modeling of Glycine in Mixed NaCl MgCl2 Solutions in a Highly Concentrated Region

Ansari, Z. H.[Ziaul Haque], Li, Z.[Zhibao]
J. Chem. Eng. Data 2016, 61, 10, 3488-3497
ABSTRACT
Electrolyte solution has an effect on growth and nonlinear optical properties of glycine crystals at certain conditions. The solubility of glycine in MgCl2 H2O solutions with molality from 0.5 to 3.5 was investigated by a dynamic method from (283.15 to 333.15) K. The solubilities of MgCl2*6H2O in glycine water solution with molalities from 0.08 to 0.67 were also measured by the same method from (293.15 to 323.15) K. For model validation, the solubility of glycine in mixed NaCl MgCl2 solutions was also measured. The solubilities of both glycine and MgCl2*6H2O solids were observed to increase with increasing temperature and concentration with respect to one another, acting as solutes. The OLI correlation with an existing model shows large errors in the solubility calculation for the glycine NaCl MgCl2 H2O system. A self-consistent model using a unified set of model parameters obtained by regressing the solubility of glycine in single salt systems was developed. The model can accurately predict the solubilities of glycine in mixed NaCl MgCl2 solutions with average absolute deviations lower than 2.5%.
Compounds
# Formula Name
1 C2H5NO2 2-aminoacetic acid
2 H2O water
3 Cl2Mg magnesium 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
  • 1
  • 2
  • 3
  • Molality, mol/kg - 1 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Titration
  • 46
  • POMD
  • 1
  • 2
  • 3
  • Molality, mol/kg - 3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal of intercomponent compound 1
  • Titration
  • 23
  • POMD
  • 1
  • 2
  • Molality, mol/kg - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Titration
  • 6
  • POMD
  • 2
  • 3
  • Molality, mol/kg - 3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal of intercomponent compound 1
  • Titration
  • 4