ABSTRACT

The densities of binary mixtures of N-methyl-2-pyrrolidone (NMP) with o-xylene, m-xylene, and p-xylene, including those of pure liquids, over the entire composition range were measured at T = (293.15, 303.15, 313.15, 323.15, 333.15, 343.15, and 353.15) K and atmospheric pressure. From the experimental data, the excess molar volume, V E m, and partial molar volumes, Vm,1 and Vm,2, were calculated over whole composition range. The V E m values were found negative for all the mixtures at each temperature studied, and decrease with rising temperature. The extent of negative deviations in V E m values follows the order: p-xylene greater than m-xylene greater than o-xylene. The variation of these parameters with composition and temperature of the mixtures has been discussed.

Compounds

#	Formula	Name
1	C8H10	1,2-dimethylbenzene
2	C8H10	1,3-dimethylbenzene
3	C8H10	1,4-dimethylbenzene
4	C5H9NO	N-methylpyrrolidone

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	VIBTUB:UFactor:8	8
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	8
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	VIBTUB:UFactor:8	8
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	8
POMD	1 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	119
POMD	2 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	119
POMD	3 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	119

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

A study of densities and volumetric properties of binary mixtures of N-methyl-2-pyrrolidone with xylene at different temperatures and atmospheric pressure

Chen, J.[Jianhui], Shen, R.[Runpu], Liu, W.[Wei], Yu, G.[Guoqi]

ABSTRACT