ABSTRACT

The separation of magnesium and aluminum bearing compounds from the (NH4)2SO4 aqueous solution is crucial for the ammonium sulfate roasting technique to extract Mg and Al from the magnesium aluminum-bearing slag. Equilibrium solubility data for the quaternary system of MgSO4 Al2(SO4)3 (NH4)2SO4 H2O at 40 and 80 deg C were therefore measured and compared with those of their ternary subsystems of MgSO4 (NH4)2SO4 H2O and Al2(SO4)3 (NH4)2SO4 H2O, respectively. The mutual salting-out effect between MgSO4 and Al2(SO4)3 in the quaternary system was further discussed. On the basis of the measured data, a strategy for effective separation of magnesium and aluminum compounds from the MgSO4 Al2(SO4)3 (NH4)2SO4 H2O system was developed.

Compounds

#	Formula	Name
1	MgO4S	magnesium sulfate
2	H2O	water
3	H8N2O4S	ammonium sulfate
4	Al2O12S3	aluminum 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	Mass density, kg/m3 ; Liquid	Mass fraction - 1; Liquid Mass fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	10
POMD	1 2 3	Mass fraction - 3 ; Liquid	Mass fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	Titration method	10
POMD	1 2 3	Mass fraction - 3 ; Liquid	Mass fraction - 1; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 2	Titration method	1
POMD	2 3 4	Mass density, kg/m3 ; Liquid	Mass fraction - 4; Liquid Mass fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Pycnometric method	8
POMD	2 3 4	Mass fraction - 3 ; Liquid	Mass fraction - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	Titration method	8
POMD	2 3 4	Mass fraction - 3 ; Liquid	Mass fraction - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 2	Titration method	2
POMD	2 3 4	Mass fraction - 3 ; Liquid	Mass fraction - 4; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal - 3	Titration method	1
POMD	1 2 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	2
POMD	1 2 4	Mass fraction - 4 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 1	Titration method	1
POMD	1 2 4	Mass fraction - 4 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 2	Titration method	1
POMD	1 2 4	Mass fraction - 4 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 1	Titration method	1
POMD	1 2 4	Mass fraction - 4 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 2	Titration method	1
POMD	2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	2
POMD	2 3	Mass fraction - 3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 3	Titration method	2

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

Solubility Investigations in the MgSO4 Al2(SO4)3 (NH4)2SO4 H2O Quaternary System at 40 and 80 deg C

Cui, W.[Wenwen], Zhang, Y.[Ying], Zheng, S.[Shili], Feng, Q.[Qiang], Li, P.[Ping], Zhang, Y.[Yi]

ABSTRACT