ABSTRACT

Vapor liquid equilibrium (VLE) data for the system formed by acetonitrile, water, and dimethyl sulfoxide (DMSO) at 101.3 kPa are measured in this paper. The data have been correlated by the classical thermodynamic models: Wilson, universal quasichemical activity coefficient (UNIQUAC), and nonrandom two-liquid (NRTL). The results indicate that all of the models can correlate the VLE data successfully and Wilson model performances the best. The effects of DMSO with various contents on the acetonitrile + water system are explored. From the results, the azeotrope is eliminated by DMSO by the means of improving their relative volatility. Hence, DMSO is an effective solvent for separating the acetonitrile + water binary azeotropic system.

Compounds

#	Formula	Name
1	C2H3N	acetonitrile
2	H2O	water
3	C2H6OS	dimethyl sulfoxide

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	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	18
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	18
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	19
POMD	3 1 2	Mole fraction - 2 ; Liquid Mole fraction - 2 ; Gas Mole fraction - 1 ; Gas	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Chromatography Chromatography Chromatography	30
POMD	1 2	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	21
POMD	1 2	Mole fraction - 1 ; Gas	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Gas Liquid	Chromatography	21
POMD	1 2	Azeotropic temperature, K ; Liquid	Pressure, kPa; Liquid		Liquid Gas	By X=Y	1
POMD	1 2	Azeotropic composition: mole fraction - 1 ; Liquid	Pressure, kPa; Liquid		Liquid Gas	By X=Y	1
POMD	3 1	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	21
POMD	3 1	Mole fraction - 1 ; Gas	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Gas Liquid	Chromatography	21
POMD	3 2	Boiling temperature at pressure P, K ; Liquid	Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid Gas	EBULLIO:UFactor:12	21
POMD	3 2	Mole fraction - 2 ; Gas	Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Gas Liquid	CHROM:UFactor:4	21

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

Isobaric Vapor Liquid Equilibrium for the Extractive Distillation of Acetonitrile + Water Mixtures Using Dimethyl Sulfoxide at 101.3 kPa

Zhang, Z.[Zhigang], Lv, M.[Ming], Huang, D.[Donghao], Jia, P.[Peng], Sun, D.[Dezhang], Li, W.[Wenxiu]

ABSTRACT