ABSTRACT

The liquid-liquid coexistence curves of the binary solutions of 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim][BF4]) + 1,3-propanediol and [C4mim][BF4] + 1,4-butanediol were determined by measuring the temperature dependence of the refractive index in the two phases of the samples with critical compositions. The critical amplitude B and the critical exponent ? have been deduced from the coexistence curves. The experimental values of ? are consistent with theoretical prediction. The results have also been analyzed to determine the Wegner-correction terms and to examine the asymmetric behavior of the diameters of the coexistence curves.

Compounds

#	Formula	Name
1	C3H8O2	propan-1,3-diol
2	C4H10O2	1,4-butanediol
3	C8H15BF4N2	1-butyl-3-methylimidazolium tetrafluoroborate

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	VIBTUB:UFactor:4	5
POMD	1	Refractive index (other wavelength) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	8
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	7
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:8	5
POMD	3	Refractive index (other wavelength) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	11
POMD	2 3	Refractive index (other wavelength) ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Wavelength, nm; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Standard Abbe refractometry	34
POMD	2 3	Refractive index (other wavelength) ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Pressure, kPa; Liquid mixture 2 Wavelength, nm; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	Standard Abbe refractometry	34
POMD	2 3	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	derived from calibration curve	34
POMD	2 3	Mole fraction - 3 ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	derived from calibration curve	34
POMD	2 3	Refractive index (other wavelength) ; Liquid	Mass fraction - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	55
POMD	1 3	Refractive index (other wavelength) ; Liquid mixture 2	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 2 Wavelength, nm; Liquid mixture 1	Liquid mixture 2 Liquid mixture 1	Standard Abbe refractometry	34
POMD	1 3	Refractive index (other wavelength) ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1 Wavelength, nm; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Standard Abbe refractometry	34
POMD	1 3	Mole fraction - 3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	derived from calibration curve	34
POMD	1 3	Mole fraction - 3 ; Liquid mixture 2	Temperature, K; Liquid mixture 2	Pressure, kPa; Liquid mixture 2	Liquid mixture 2 Liquid mixture 1	derived from calibration curve	34
POMD	1 3	Refractive index (other wavelength) ; Liquid	Mass fraction - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Wavelength, nm; Liquid	Liquid	Standard Abbe refractometry	55

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

Liquid-Liquid Coexistence Curves of {x 1-Butyl-3-methylimidazolium Tetrafluoroborate + (1 - x) 1,3-Propanediol} and {x 1-Butyl-3-methylimidazolium Tetrafluoroborate + (1 - x) 1,4-Butanediol}

Lv, H.[Hekun], Guo, Y.[Yimin], An, X.[Xueqin], Sheng, W.[Weiguo]

ABSTRACT