ABSTRACT

Dew points of pure 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and 1,8-diazabicyclo[5.4.0]undec-7-ene(DBU) were measured using low pressure distillation. The distillation experiments were conducted withina 0.5 - 12.1 kPa pressure range. The measured dew point data were in good agreement with the vaporpressure data available in the open literature. The combined measured dew point and literature vaporpressure data were modeled using an Antoine type equation.Vapor-liquid equilibrium (VLE) of water + DBN and water + DBU systems were measured using two variations of a static total pressure method. The VLE measurements were conducted within a 313 - 353 K temperature range. The results indicate a negative deviation from Raoult's law for both systems. Legendre polynomial and NRTL activity coefficient models were used to describe the liquid phases of the systems.

Compounds

#	Formula	Name
1	C7H12N2	1,5-diazabicyclo[4.3.0]non-5-ene
2	C9H16N2	1,8-diaza-7-bicyclo[5.4.0]undecene
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	1	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid		Liquid Gas	distillation unit - dew point temperature	18
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	7
POMD	2	Boiling temperature at pressure P, K ; Liquid	Pressure, kPa; Liquid		Liquid Gas	distillation unit - dew point temperature	19
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid		Liquid Gas	Closed cell (Static) method	63
POMD	1 3	Mole fraction - 3 ; Gas	Temperature, K; Gas Mole fraction - 3; Liquid		Gas Liquid	Model Smoothing	63
POMD	2 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid		Liquid Gas	Closed cell (Static) method	42
POMD	2 3	Mole fraction - 3 ; Gas	Temperature, K; Gas Mole fraction - 3; Liquid		Gas Liquid	Model Smoothing	42

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Dew points of pure DBN and DBU and vapor-liquid equilibria of water + DBN and water + DBU systems for cellulose solvent recycling

Ostonen, A.[Alexandr], Uusi-Kyyny, P.[Petri], Pakkanen, M.[Minna], Alopaeus, V.[Ville]

ABSTRACT