ABSTRACT

This work reports densities and speeds of sound of some alkyl lactates + alkanols binary mixtures over the whole composition range at T = 298.15 K and p = 0.1 MPa. The studied systems were methyl lactate or ethyl lactate with methanol, ethanol, 1-propanol, or 1-butanol. From experimental results, excess molar volumes and excess isentropic compressibilities have been calculated. Furthermore, excess molar enthalpies were experimentally determined at T = 298.15 K and p = 0.1 MPa. Finally, the excess properties were correlated with composition and discussed taking into account the associated character of both components, alkyl lactates and alkanols. From this analysis it has been concluded that excess properties values depend mainly on the length of the alkyl chain of the alkanol.

Compounds

#	Formula	Name
1	C4H8O3	methyl 2-hydroxypropanoate
2	C5H10O3	DL-ethyl lactate
3	CH4O	methanol
4	C2H6O	ethanol
5	C3H8O	propan-1-ol
6	C4H10O	butan-1-ol

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid		Liquid	Single path-length method	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid		Liquid	Single path-length method	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid		Liquid	Single path-length method	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid		Liquid	Single path-length method	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	5	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid		Liquid	Single path-length method	1
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid		Liquid	Single path-length method	1
POMD	1 3	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	1 3	Speed of sound, m/s ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	1 3	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	12
POMD	1 4	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	1 4	Speed of sound, m/s ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	1 4	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11
POMD	1 5	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	1 5	Speed of sound, m/s ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	1 5	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11
POMD	1 6	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	1 6	Speed of sound, m/s ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	1 6	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11
POMD	2 3	Mass density, kg/m3 ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	2 3	Speed of sound, m/s ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	2 3	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11
POMD	2 4	Mass density, kg/m3 ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	2 4	Speed of sound, m/s ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	2 4	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11
POMD	2 5	Mass density, kg/m3 ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	2 5	Speed of sound, m/s ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	2 5	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11
POMD	2 6	Mass density, kg/m3 ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	13
POMD	2 6	Speed of sound, m/s ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Single path-length method	13
POMD	2 6	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Power-compensation calorimetry	11

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic behaviour of alkyl lactate-alkanol systems

Sanchez, Jaime, Artigas, Hector, Gascon, Ignacio, Lafuente, Carlos

ABSTRACT