ABSTRACT

(Vapor + liquid) equilibrium of scent components, coumarin (1-benzopyran-2-one, CAS Registry No. 91-64-5) and vanillin (4-hydroxy-3-methoxybenzaldehyde, CAS Registry No. 121-33-5), in alcohols, ethanol, 1-propanol, and 2-propanol were measured at atmospheric pressure in the dilute composition range of solid components with a recirculation still. Equilibrium compositions were determined with an ultraviolet spectrometer. The activity coefficients of coumarin at infinite dilution in alcohol were almost unity. The activity coefficients at infinite dilution of vanillin in alcohol were less than unity.

Compounds

#	Formula	Name
1	C2H6O	ethanol
2	C3H8O	propan-1-ol
3	C3H8O	propan-2-ol
4	C9H6O2	1,2-benzopyrone
5	C8H8O3	vanillin

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	Phase	Method	#Points
POMD	1	Normal boiling temperature, K ; Liquid		Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	1
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	VIBTUB:UFactor:2	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	VIBTUB:UFactor:2	1
POMD	1 4	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 4; Liquid Temperature, K; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	1 4	Mole fraction - 4 ; Gas	Mole fraction - 4; Liquid Temperature, K; Gas	Gas Liquid	spectrophotometer	4
POMD	2 4	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 4; Liquid Temperature, K; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	2 4	Mole fraction - 4 ; Gas	Mole fraction - 4; Liquid Temperature, K; Gas	Gas Liquid	spectophotometer	4
POMD	3 4	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 4; Liquid Temperature, K; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	3 4	Mole fraction - 4 ; Gas	Mole fraction - 4; Liquid Temperature, K; Gas	Gas Liquid	spectrophotometer	4
POMD	1 5	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 5; Liquid Temperature, K; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	1 5	Mole fraction - 5 ; Gas	Mole fraction - 5; Liquid Temperature, K; Gas	Gas Liquid	spectrophotometer	4
POMD	2 5	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 5; Liquid Temperature, K; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	2 5	Mole fraction - 5 ; Gas	Mole fraction - 5; Liquid Temperature, K; Gas	Gas Liquid	spectrophotometer	4
POMD	3 5	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 5; Liquid Temperature, K; Liquid	Liquid Gas	Ebulliometric method (Recirculating still)	4
POMD	3 5	Mole fraction - 5 ; Gas	Mole fraction - 5; Liquid Temperature, K; Gas	Gas Liquid	spectrophotometer	4

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

Vapor-Liquid Equilibrium Behaviors of Coumarin and Vanillin in Ethanol, 1-Propanol, and 2-Propanol

Kato, M.[Masahiro], Kodama, D.[Daisuke], Abe, S.[Susumu], Ohira, K.[Koji], Sato, M.[Masami], Sugiyama, K.[Koki]

ABSTRACT