ABSTRACT

A solid-liquid equilibrium (SLE) study was conducted in the ternary system KNO3 + NH4NO3 + H2O using the isothermal solution saturation method at temperatures of 293.15 K, 303.15 K, 313.15 K and 323.15 K. The experimental data obtained were used to plot a section of the solubility polytherm of the investigated system and show the dependence of the densities of equilibrium solutions on their chemical compositions. It has been found that a complex salt of the formula K0.33(NH4)0.66NO3 is formed in the system at a temperature below 303.15 K.

Compounds

#	Formula	Name
1	H4N2O3	ammonium nitrate
2	KNO3	potassium nitrate
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	2 1 3	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	chemical analysis and spectroscopy	28
POMD	2 1 3	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	chemical analysis and spectroscopy	35
POMD	2 1 3	Molality, mol/kg - 1 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal	chemical analysis and spectroscopy	4
POMD	2 1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	62
POMD	1 3	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	chemical analysis and spectroscopy	4
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	4
POMD	2 3	Solid-liquid equilibrium temperature, K ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	chemical analysis and spectroscopy	4
POMD	2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	4

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

Equilibrium Study in the KNO3 + NH4NO3 + H2O System at Temperatures from 293.15 to 323.15 K

Wrobel-Kaszanek, Adriana, Druzynski, Sebastian, Kielkowska, Urszula, Mazurek, Krzysztof

ABSTRACT