Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid) phase equilibria of binary mixtures 1-butyl-3-methylimidazolium tetrafluoroborate and tert-butanol or 1,2-butanediol

Zheng, P.[Peizhu], Zhang, X.[Xianshuo], Yin, T.[Tianxiang], Shen, W.[Weiguo]
J. Chem. Thermodyn. 2016, 95, 26-34
ABSTRACT
Precise (liquid + liquid) coexistence curves of binary mixtures {1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim][BF4]) + tert-butanol or RS-1,2-butanediol} have been measured. Critical exponent b and critical amplitude ^BZ 0 were deduced from the (liquid + liquid) equilibria data in the critical regions, and it was found that the critical exponent b coincided well with the 3D-Ising value. The complete scaling theory was applied to describe the asymmetry behavior of the diameter of the coexistence curves, which suggested that the heat capacity related term showed significant importance. The reduced critical temperature and density were calculated by the restricted primitive model (RPM), which were used to discuss the driven force of phase separation. Moreover, the dependences of the critical temperature, the critical mole fraction, the reduced critical temperature and the reduced critical density on the permittivity of alcohol for a series of binary solutions of RTIL in alcohols are discussed.
Compounds
# Formula Name
1 C8H15BF4N2 1-butyl-3-methylimidazolium tetrafluoroborate
2 C4H10O 2-methylpropan-2-ol
3 C4H10O2 1,2-butanediol
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 (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 20
  • POMD
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 10
  • POMD
  • 3
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 12
  • POMD
  • 2
  • 1
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 2
  • 1
  • Upper consolute composition: mole fraction - 1 ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • equal volume method
  • 1
  • POMD
  • 2
  • 1
  • 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
  • 45
  • POMD
  • 2
  • 1
  • 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
  • 45
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 45
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Index of refraction calibration data
  • 45
  • POMD
  • 2
  • 1
  • Refractive index (other wavelength) ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 72
  • POMD
  • 3
  • 1
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 3
  • 1
  • Upper consolute composition: mole fraction - 1 ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • equal volume method
  • 1
  • POMD
  • 3
  • 1
  • 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
  • 33
  • POMD
  • 3
  • 1
  • 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
  • 33
  • POMD
  • 3
  • 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 33
  • POMD
  • 3
  • 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Index of refraction calibration data
  • 33
  • POMD
  • 3
  • 1
  • Refractive index (other wavelength) ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 78