ABSTRACT

The removal and recycling of acetic acid from acetic acid + water mixture has a great significance for environmental protection and resource utilization. After the addition of ionic liquid (IL) 1-butyl-3-methylimidazolium dibutylphosphate [BMIM][DBP], the boiling point difference of the water + acetic acid system increased from 17.88 K (0 mass % IL) to 41.13 K (about 59 mass % IL), and the relative volatility (x1 = 0.9) increased from 1.60 (0 mass % IL) to 9.81 (about 57 mass % IL). [BMIM][DBP] showed a remarkable entrainer performance for the separation of acetic acid from aqueous solution. In this work, Isobaric vapor-liquid equilibrium (VLE) data of the systems water + acetic acid, water + [BMIM][DBP],acetic acid + [BMIM][DBP], and water + acetic acid + [BMIM][DBP] were determined at 101.32 kPa by using an improved Rose-Williams equilibrium still. Based on the chemical theory and Hayden-O'Connell (HOC) method, the parameters of NRTL model for the binary systems were obtained, and the predicted valuesof the ternary systems of water + acetic acid + [BMIM][DBP] fitted the experimental VLE data well.

Compounds

#	Formula	Name
1	C16H33N2O4P	1-butyl-3-methylimidazolium dibutyl phosphate
2	C2H4O2	acetic acid
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	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2 3	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	9
POMD	2 3	Mole fraction - 3 ; Gas	Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Gas Liquid	Chromatography	9
POMD	3 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	17
POMD	3 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	3
POMD	2 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	8
POMD	2 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	3
POMD	2 3 1	Mole fraction - 2 ; Liquid Mole fraction - 2 ; Gas Mole fraction - 3 ; Gas	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Gas	Chromatography Chromatography Chromatography	36

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Isobaric vapor-liquid equilibrium for water + acetic acid + 1-butyl-3-methylimidazolium dibutylphosphate at 101.32 kPa

Peng, Y.[Yong], Fu, J.[Jie], Lu, X.[Xiuyang]

ABSTRACT