ABSTRACT

The separation of cadmium and nickel from sulfate leach liquors of waste Ni-Cd batteries is investigated by using ternary phase diagrams. Experimental studies are carried out to obtain ternary phase diagrams of nickel sulfate, cadmium sulfate and water mixture at 40 C and 80 C. The eutectic point is determined to be composed of CdSO4.8/3H2O + NiSO4.6H2O and CdSO4.H2O + NiSO4.6H2O, for 40 C and 80 C, respectively, while two univariant curves and two crystallization regions are observed corresponding toCdSO4.8/3H2O and NiSO4.6H2O at 40 C, CdSO4.H2O and NiSO4.6H2O at 80 C. Both low (40 C) and high(80 C) temperature systems belong to a simple saturated type while no double salts or solid solutions exist.

Compounds

#	Formula	Name
1	CdO4S	cadmium sulfate
2	NiO4S	nickel monosulfate
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	3 2 1	Mass fraction - 2 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	ICP-OES	16
POMD	3 2 1	Mass fraction - 2 ; Liquid	Temperature, K; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 2	ICP-OES	18
POMD	3 2 1	Eutectic composition: mole fraction - 2 ; Liquid	Temperature, K; Liquid		Liquid Crystal of intercomponent compound 1 Crystal of intercomponent compound 2 Air at 1 atmosphere	Derived from phase diagram analysis	2

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Ternary phase diagrams of CdSO4-NiSO4-H2O at 40deg C and 80deg C

Ozdugan, E.[Erhan], Andak, B.[Bayram], Bulutcu, N.[Nusret], Turdu, S.[Selcuk], Tatlier, M.[Melkon]

ABSTRACT