ABSTRACT

The solubility of Li2CO3 in Na K Li Cl brines was measured by isothermal dissolution method within the temperature range of 20 to 90 C. It was found the solubility of Li2CO3 in all systems investigated decreased with increasing temperature. In NaCl and KCl solutions, the solubility of Li2CO3 initially increased to a maximum value and then decreased gradually with increasing solution concentration. However, the solubility of Li2CO3 in LiCl solutions decreased with increasing LiCl concentration due to the common ion effect of added Li+. New Pitzer activity coefficient model parameters for the Li+ CO3 2 ion pair were obtained by using experimental solubility data of Li2CO3 in pure water, and a new chemical model was built with the aid of Aspen Plus platform. The new model was shown to successfully predict the solubility of Li2CO3 in NaCl, KCl, LiCl and mixed NaCl KCl solutions. Moreover, the new model could aid in analyzing the separation of lithium and magnesium in brines.

Compounds

#	Formula	Name
1	CLi2O3	lithium carbonate
2	ClNa	sodium chloride
3	ClK	potassium chloride
4	ClLi	lithium chloride
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	1 5	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TOC (total organic carbon) analysis	9
POMD	1 2 5	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TOC (total organic carbon) analysis	72
POMD	1 2 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	72
POMD	1 3 5	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TOC (total organic carbon) analysis	24
POMD	1 3 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	24
POMD	1 4 5	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	TOC (total organic carbon) analysis	24
POMD	1 4 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	24

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Solubility of Li2CO3 in Na-K-Li-Cl brines from 20 to 90 C

Cheng, W.[Wenting], Li, Z.[Zhibao], Cheng, F.[Fangqin]

ABSTRACT