Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Solid liquid equilibrium of 1-hydroxyethane-1,1-diphosphonic acid in different solvents

Zhang, X.[Xiangyang], Yang, X.[Xiaowu], Hao, L.[Lin], Wei, H.[Hongyuan]
Fluid Phase Equilib. 2013, 338, 265-268
ABSTRACT
The solubilities of 1-hydroxyethane-1,1-diphosphonic acid in five different solvents including ethanol, isopropyl alcohol, n-propyl alcohol, acetone and acetic acid were determined at temperatures ranging from 288.45 to 327.95 K at atmospheric pressure using a gravimetric method. Van t Hoff equation was used to correlate the experimental solubility data. The calculated values of van t Hoff equation were found to be in good agreement with the experimental data. Further, the dissolution enthalpy and entropy of HEDP in the corresponding solvents were predicted.
Compounds
# Formula Name
1 C2H8O7P2 etidronic acid
2 C2H6O ethanol
3 C3H8O propan-1-ol
4 C3H8O propan-2-ol
5 C3H6O acetone
6 C2H4O2 acetic acid
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
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Gravimetric method
  • 10
  • POMD
  • 3
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Gravimetric method
  • 10
  • POMD
  • 4
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Gravimetric method
  • 9
  • POMD
  • 5
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Gravimetric method
  • 9
  • POMD
  • 6
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Gravimetric method
  • 10