ABSTRACT

The phase-forming ability of KCl in propanols has been investigated, aiming to assess its utility in aqueous two-phase extraction. Equilibrium data of the different equilibrium regions (SLLV, SLV, LLV, and LV) of aqueous two-phase systems (ATPSs) of water + KCl + 1-propanol and water + KCl + 2-propanol have been determined at the boiling temperatures of the mixtures and 101.3 kPa. In addition, the lowest critical solution temperature (LCST) for the water + KCl + 1-propanol system was measured to be 271.2 K, and the equilibrium behavior of the system in the vicinity of the LCST (at 268.1 and 273.1 K) was also determined. Finally, using various methods such as the effective excluded volume (EEV) theory, Setchenov-type equations, and the plait point of the liquid-liquid region, different salt and alcohol systems have been studied and classified according to their ability to produce ATPSs.

Compounds

#	Formula	Name
1	ClK	potassium chloride
2	C3H8O	propan-1-ol
3	C3H8O	propan-2-ol
4	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 4 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	gravimetric analysis	26
POMD	2 4 1	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 2 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 2; Liquid mixture 2	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	gravimetric method gravimetric method gravimetric method	11
POMD	2 4 1	Mole fraction - 1 ; Liquid Mole fraction - 1 ; Gas Mole fraction - 2 ; Gas	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid Gas	gravimetric method gravimetric method gravimetric method	54
POMD	3 4 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	gravimetric analysis	14
POMD	3 4 1	Mole fraction - 1 ; Liquid Mole fraction - 1 ; Gas Mole fraction - 3 ; Gas	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Gas	gravimetric method gravimetric method gravimetric method	35
POMD	3 4 1	Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 3; Liquid mixture 2	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	gravimetric method gravimetric method gravimetric method	6

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Effect of temperature on the phase-separation ability of KCl in aqueous two-phase systems composed of propanols: Determination of the critical temperature and extension of the results to other salts

Garcia-Cano, Jorge, Gomis, Alejandro, Font, Alicia, Gomis, Vicente

ABSTRACT