ABSTRACT

Reviewing the literature solubility isotherms in the ternary systemsK2SO4 MSO4 H2O(M= Co, Ni, Cu, Zn) revealed a lack at ambient temperatures. The solid liquid phase equilibria have been determined in the systems K2SO4 MSO4 H2O (M= Co, Ni, Cu) at T = 313 K. With increasing bivalent metal sulfate concentration, the solubility of potassium sulfate rises until the two-salt point is reached. Reciprocally, the solubility of the bivalent metal sulfate hydrates (CoSO4*7H2O, -NiSO4*6H2O, CuSO4*5H2O) increases with rising potassium sulfate concentration. In all three systems the double salts of Tutton s type K2SO4*MSO4*6H2O (M= Co, Ni, Cu) are formed.

Compounds

#	Formula	Name
1	K2O4S	potassium sulfate
2	CoO4S	cobalt(II) sulfate
3	NiO4S	nickel monosulfate
4	CuO4S	copper sulfate
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	5 1 2	Molality, mol/kg - 2 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal - 2	Titration	19
POMD	5 1 2	Molality, mol/kg - 1 ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Pressure, kPa; Crystal - 1 Temperature, K; Crystal - 1	Liquid Crystal - 1	Gravimetric Method	19
POMD	5 1 3	Molality, mol/kg - 3 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid	Pressure, kPa; Crystal - 3 Temperature, K; Crystal - 3	Liquid Crystal - 3	Gravimetric Method	22
POMD	5 1 3	Molality, mol/kg - 1 ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Pressure, kPa; Crystal - 1 Temperature, K; Crystal - 1	Liquid Crystal - 1	Gravimetric Method	22
POMD	5 4 1	Molality, mol/kg - 1 ; Liquid	Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Crystal - 1 Temperature, K; Crystal - 1	Liquid Crystal - 1	Gravimetric Method	22
POMD	5 4 1	Molality, mol/kg - 4 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid	Pressure, kPa; Crystal - 4 Temperature, K; Crystal - 4	Liquid Crystal - 4	Titration	22
POMD	5 2	Molality, mol/kg - 2 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal - 2	Titration	1
POMD	5 3	Molality, mol/kg - 3 ; Liquid	Pressure, kPa; Crystal - 3 Temperature, K; Crystal - 3		Liquid Crystal - 3	Gravimetric Method	1

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Solid liquid phase equilibria in the systems K2SO4 MSO4 H2O (M= Co, Ni, Cu) from ambient to enhanced temperatures

Wollmann, G.[Georgia], Voigt, W.[Wolfgang]

ABSTRACT