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

MgF2 Solubility in MgF2 + Salt + H2O Systems (Salt = MgSO4, (NH4)2SO4, NH4Cl) at 298.15 K

Li, Hongliang, Xu, Chao, Tan, Ze, Zeng, Dewen
J. Chem. Eng. Data 2019, 64, 1, 245-248
ABSTRACT
MgSO4 and (NH4)2SO4 are the main impurities in the hydrometallurgical systems of zinc and manganese. To understand their influences on MgF2(s) solubility, which the fluoride in these systems is expected to remove, we measured MgF2(s) solubility in NH4Cl, (NH4)2SO4 and MgSO4 aqueous solutions at 298.15 K. It was found that the MgF2(s) solubility exhibits salt-in effect in the (NH4)2SO4(aq) and NH4Cl(aq) solutions, however, salt-out and salt-in effect MgSO4(aq) solution. Further more, in the the MgF2(s) solubility in (NH4)2SO4(aq) is higher than in NH4Cl(aq) solution. ACIEIonic association reactions have been derived to interpret the above solubility phenomina..
Compounds
# Formula Name
1 F2Mg magnesium difluoride
2 MgO4S magnesium sulfate
3 H8N2O4S ammonium sulfate
4 ClH4N ammonium chloride (NH4Cl)
5 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
  • 3
  • 5
  • Molality, mol/kg - 1 ; Liquid
  • Molality, mol/kg - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • ion-selective electrode and tiitration with EDTA
  • 9
  • POMD
  • 1
  • 4
  • 5
  • Molality, mol/kg - 1 ; Liquid
  • Molality, mol/kg - 4; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • ion-selective electrode and tiitration with EDTA
  • 9
  • POMD
  • 1
  • 2
  • 5
  • Molality, mol/kg - 1 ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • ion-selective electrode and tiitration with EDTA
  • 6
  • POMD
  • 1
  • 2
  • 5
  • Molality, mol/kg - 1 ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal of intercomponent compound 1
  • ion-selective electrode and tiitration with EDTA
  • 1
  • POMD
  • 1
  • 5
  • Molality, mol/kg - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • ion-selective electrode and tiitration with EDTA
  • 1