ABSTRACT

As a continuation of our previous study in which the basic data about the NH4Cl CaCO3 H2O ternary system was measured, the solubility and physical properties (density, viscosity, and refractive index) of calcium carbonate in ammonium sulfate aqueous solution at (298.15, 323.15, and 348.15) K have been investigated by using the isothermal dissolution method in this work. The results showed that the solubility of calcium carbonate increased as the molality of ammonium sulfate aqueous solutions and temperature increased. The solubility of calcium carbonate in ammonium sulfate aqueous solutions and the viscosity of aqueous solutions were correlated with the second-order polynomial equation and semiempirical exponential model equation, respectively. By comparing the calculated values with experimental data, the second-order polynomial equation and semiempirical exponential model equation provide accurate mathematical representations of the experimental results. The obtained experimental data in this work could provide available data for the industrial production of calcium carbonate products and further theoretical studies.

Compounds

#	Formula	Name
1	H8N2O4S	ammonium sulfate
2	CCaO3	calcium carbonate
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	2 3 1	Molality, mol/kg - 2 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	titration	33
POMD	2 3 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	33
POMD	2 3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	33
POMD	2 3 1	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	33

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

Measurement of Physical Properties and Correlation of the Solubility of Calcium Carbonate in Ammonium Sulfate Aqueous Solution at T = (298.15, 323.15, and 348.15) K in the Process of Preparing Calcium Carbonate Products by the Desulfurization of Gypsum

Wang, J.[Jinjun], Zhao, H.[Haipeng], Ren, Y.[Yongsheng]

ABSTRACT