ABSTRACT

Solid-liquid equilibria of quaternary system (Ca2+, Mg2+//SO32-, SO42--H2O) and its ternary systems (Ca2+//SO32-, SO42--H2O; Mg2+//SO32-, SO42--H2O and Ca2+, Mg2+//SO32--H2O) at 298.15 K were investigated via isothermal solution saturation method. Furthermore, the phase diagrams of these systems were constructed. The results show that the quaternary diagram contains three invariant points, seven univariant curves and five crystallization fields corresponding to MgSO4*7H2O, MgSO3*6H2O, CaSO3*0.5H2O, Ca(SO3)0.89(SO4)0.11*0.5H2O and CaSO4*2H2O. The crystallization field of Ca(SO3)0.89(SO4)0.11*0.5H2O is the largest compared with the others. In addition, crystal complex Ca(SO3)0.89(SO4)0.11*0.5H2O also appears in the

Compounds

#	Formula	Name
1	CaO4S	calcium sulfate
2	CaO3S	calcium sulfite
3	H2O	water
4	MgO3S	magnesium sulfite
5	MgO4S	magnesium sulfate

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 2 3	Molality, mol/kg - 2 ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	spectroscopy	4
POMD	1 2 3	Molality, mol/kg - 2 ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 2	spectroscopy	11
POMD	1 2 3	Molality, mol/kg - 2 ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 3	spectroscopy	3
POMD	4 5 3	Molality, mol/kg - 5 ; Liquid	Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	spectroscopy	3
POMD	4 5 3	Molality, mol/kg - 5 ; Liquid	Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	spectroscopy	11
POMD	2 4 3	Molality, mol/kg - 4 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	spectroscopy	3
POMD	2 4 3	Molality, mol/kg - 4 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 2	spectroscopy	9
POMD	1 3	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 1	spectroscopy	1
POMD	2 3	Molality, mol/kg - 2 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 3	spectroscopy	1
POMD	2 3	Molality, mol/kg - 2 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 2	spectroscopy	1
POMD	5 3	Molality, mol/kg - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 1	spectroscopy	1
POMD	4 3	Molality, mol/kg - 4 ; Liquid		Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	spectroscopy	2

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

Solid-Liquid Equilibrium of the Quaternary System Ca2+, Mg2+//SO32-, SO42--H2O at 298.15 K

Meng, Xianze, Wu, Xiaozhen, Yuan, Junsheng

ABSTRACT