ABSTRACT

A thermodynamic study of three ethanolamines, 2-(diethylamino)ethanol, 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, reporting the measurements of vapor pressure, liquid phase heat capacities, and phase behavior is presented in this work. The vapor pressures were measured using a static method in the temperature interval 238-343 K. After a critical assessment of literature data, selected experimental data were correlated using the Cox equation. The liquid phase heat capacities were measured in the temperature range 265-355 K using Tian-Calvet calorimetry and the phase behavior was investigated using differential scanning calorimetry (DSC) starting from 183 K. For 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, two monotropically related crystalline forms were identified. To our knowledge, vapor pressure and heat capacity for 2-(isopropylamino)ethanol and phase behavior data for 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol are reported for the first time in this work.

Compounds

#	Formula	Name
1	C6H15NO	(diethylamino)ethanol
2	C4H11NO	2-(ethylamino)ethanol
3	C5H13NO	2-isopropylaminoethanol

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	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	24
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	19
POMD	2	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	2	Vapor or sublimation pressure, kPa ; Metastable liquid	Temperature, K; Metastable liquid		Metastable liquid Gas	Closed cell (Static) method	15
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	27
POMD	2	Vapor or sublimation pressure, kPa ; Crystal	Temperature, K; Crystal		Crystal Gas	Closed cell (Static) method	18
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	19
POMD	3	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3	Vapor or sublimation pressure, kPa ; Metastable liquid	Temperature, K; Metastable liquid		Metastable liquid Gas	Closed cell (Static) method	27
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid		Liquid Gas	Closed cell (Static) method	42
POMD	3	Vapor or sublimation pressure, kPa ; Crystal	Temperature, K; Crystal		Crystal Gas	Closed cell (Static) method	24
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	14
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Metastable liquid	Temperature, K; Metastable liquid	Pressure, kPa; Metastable liquid	Metastable liquid	DSC	5

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Vapor pressures and thermophysical properties of selected ethanolamines

Soares, B. P.[Bruna P.], Stejfa, V. e.[Vojtech], Ferreira, O.[Olga], Pinho, S. P.[Simao P.], Ruzicka, K.[Kvetoslav], Fulem, M.[Michal]

ABSTRACT