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

A Comprehensive Model of Synthetic Bayer Liquors. Part 2. Densities of Alkaline Aluminate Solutions to 90 deg C

Konigsberger, E.[Erich], Bevis, S.[Simon], Hefter, G.[Glenn], May, P. M.[Peter M.]
J. Chem. Eng. Data 2005, 50, 4, 1270-1276
ABSTRACT
Densities of NaOH + NaAl(OH)4 solutions were measured in isomolal series at ionic strengths (I) over the range 1 = I / mol kg-1 = 6 and at total concentration ratios of 0 = [Al(III)]T/[Na+]T = 0.6 in the temperature range 50 = t / deg C = 90. A Pitzer model representing the volumetric properties of hypothetical, pure sodium aluminate solutions was derived and incorporated into our thermodynamic model of synthetic Bayer liquor solutions, consisting of the components NaOH + NaAl(OH)4 + Na2CO3 + Na2SO4 + NaCl + NaF + Na2C2O4 (sodium oxalate) + NaHCOO (sodium formate) + NaCH3COO (sodium acetate) + H2O. The model calculations agree with experimental densities of twelve 7-component synthetic Bayer liquors to better than 0.1 %.
Compounds
# Formula Name
1 HNaO sodium hydroxide
2 AlH4NaO4 aluminum sodium hydroxide
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
  • 3
  • 2
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Molality, mol/kg - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 124