ABSTRACT

Solid-liquid phase equilibrium for chloride salts system plays a vital role in utilization of liquid waste generated from soda ash production by the Solvay process. The equilibrium data for ternary systems, including AlCl3-NaCl-H2O, AlCl3-NH4Cl-H2O, and CaCl2-NH4Cl-H2O, were measured by a dynamic method over the temperature range from 283 K to 353 K. A rigorous chemical model for these systems was developed with the mixed solvent electrolyte (MSE) model parameterization with average absolute relative deviation less than 5%. The new model is capable of calculating solubilities of NaCl and NH4Cl in AlCl3-CaCl2-H2O system, and the average absolute relative deviation of predicted points is less than 6%. The experimental and calculated phase equilibria have been used in developing a novel recovery method for NaCl and CaCl2 in the liquid waste from the Solvay process and subsequent utilization of CaCl2.

Compounds

#	Formula	Name
1	AlCl3	aluminum chloride
2	CaCl2	calcium chloride
3	ClNa	sodium chloride
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 - 3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	titration	75
POMD	1 3 5	Molality, mol/kg - 3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	titration	14
POMD	1 4 5	Molality, mol/kg - 4 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	titration	88
POMD	2 4 5	Molality, mol/kg - 4 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	titration	87
POMD	2 4 5	Molality, mol/kg - 4 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	titration	10
POMD	2 3 5	Molality, mol/kg - 3 ; Liquid	Temperature, K; Liquid	Molality, mol/kg - 2; Liquid Pressure, kPa; Liquid	Liquid Crystal - 3	titration	5
POMD	3 5	Molality, mol/kg - 3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	titration	5
POMD	1 5	Solid-liquid equilibrium temperature, K ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	titration	5
POMD	4 5	Molality, mol/kg - 4 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 4	titration	5
POMD	2 5	Solid-liquid equilibrium temperature, K ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	titration	5

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

Measurements and Modeling of the Phase Equilibria in AlCl3 + NaCl + CaCl2 + H2O and AlCl3 + CaCl2 + NH4Cl + H2O Systems

Zeng, X.[Xiangzhao], Zeng, Y.[Yan], Li, Z.[Zhibao]

ABSTRACT