ABSTRACT

In light of the advantages of liquid-liquid extraction, it is important to reduce the mutual solubility of extractant and solvent in the liquid feed. Highly efficient novel aqueous two-phase systems composed of 2-propanol and water were created by the introduction of highly soluble salts at high salt concentrations. The water + 2-propanol + K2HPO4/K4P2O7 systems are recommended for the extraction of the value-added chemicals since they lead to trace amounts of 2-propanol in the aqueous phase and salt in the organic phase. The e-NRTL-RK model was employed to correlate the aqueous two-phase systems (organic phase and aqueous phase) with high accuracy. With the roles of the salting-out effects and the solubility of the salt in mind, we are able to exploit the highly efficient novel aqueous two-phase systems composed of 2-propanol, water, and other highly soluble salts.

Compounds

#	Formula	Name
1	C3H8O	propan-2-ol
2	H2O	water
3	CK2O3	potassium carbonate
4	HK2O4P	dipotassium hydrogen phosphate
5	K3O4P	tripotassium phosphate
6	K4O7P2	potassium pyrophosphate

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 fraction - 1 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 2 Mass fraction - 2 ; Liquid mixture 2	Mass fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	9
POMD	1 2 4	Mass fraction - 1 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 2 Mass fraction - 2 ; Liquid mixture 2	Mass fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	11
POMD	1 2 5	Mass fraction - 1 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 2 Mass fraction - 2 ; Liquid mixture 2	Mass fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	9
POMD	1 2 6	Mass fraction - 1 ; Liquid mixture 1 Mass fraction - 1 ; Liquid mixture 2 Mass fraction - 2 ; Liquid mixture 2	Mass fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Chromatography Chromatography Chromatography	10

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Creating efficient novel aqueous two-phase systems: Salting-out effect and high solubility of salt

Fu, Chuhan, Song, Wenli, Yi, Conghua, Xie, Shaoqu

ABSTRACT