ABSTRACT

Levulinic and lactic acids are important feedstock in a wide range of different industries such as polymer, pharmaceutical or food manufacture. In this work, a study about levulinic acid and lactic acid recovery from their aqueous solutions was carried out using the hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonil)imide, [BMim][NTf2]. Liquid-liquid equilibria data for the ternary systems water + levulinic acid or lactic acid + IL were determined. The obtained experimental data were correlated by using NRTL equation. An analysis of the influence of the acid structure and the addition of salting-out agents (potassium phosphate, ammonium sulphate and saccharose) on the phase equilibria, was also carried out. [BMim][NTf2] was found to be a good extractant for the recovery of levulinic acid and the extraction process was improved by the addition ammonium sulphate.

Compounds

#	Formula	Name
1	C5H8O3	4-oxopentanoic acid
2	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
3	H2O	water
4	C3H6O3	2-hydroxypropanoic acid

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1 3 2	Mole fraction - 1 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	13
POMD	1 3 2	Mass density, kg/m3 ; Liquid	Mole fraction - 3; Liquid Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	12
POMD	1 3 2	Mole fraction - 1 ; Liquid mixture 1 Mole fraction - 1 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 2	Mole fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Density calibration data Density calibration data Density calibration data	5
POMD	4 3	Mass density, kg/m3 ; Liquid	Mass fraction - 3; Liquid Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4 3 2	Mole fraction - 3 ; Liquid mixture 1 Mole fraction - 4 ; Liquid mixture 2 Mole fraction - 3 ; Liquid mixture 2	Mole fraction - 4; Liquid mixture 1	Temperature, K; Liquid mixture 2 Pressure, kPa; Liquid mixture 2	Liquid mixture 1 Liquid mixture 2	Density calibration data Density calibration data Density calibration data	7
POMD	4 3 2	Mole fraction - 4 ; Liquid mixture 1	Mole fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Titration method	17
POMD	4 3 2	Mass density, kg/m3 ; Liquid	Mole fraction - 3; Liquid Mole fraction - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	3 2	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Liquid mixture 2	Titration method	1

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

Extraction of Carboxylic Acids from Aqueous Solutions by Using [BMim][NTf2] and Salting-out Agents

Riveiro, E.[Elisa], Villar, L.[Lorena], Sas, O. G.[Olalla G.], Gonzalez, B.[Begona], Canosa, J.[Jose], Dominguez, A.[Angeles]

ABSTRACT