Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Measurements of the liquid-liquid coexistence curves of {(1 - x) dimethyl carbonate + x pentadecane} and {(1 - x) dimethyl carbonate + x heptadecane} in the critical region

Guo, Yimin, Shi, Aiqin, Chen, Zhiyun, Shen, Weiguo
J. Chem. Thermodyn. 2019, 128, 198-206
ABSTRACT
The liquid-liquid coexistence curves in a temperature range of about 10 K from the upper consolute critical temperature for binary solutions of {dimethyl carbonate + pentadecane} and {dimethyl carbonate + heptadecane} have been precisely measured. The upper consolute mole fraction xc of n-alkane and the upper consolute temperature Tc were determined to be xc = 0.210, Tc = 312.234 K for {dimethyl carbonate + pentadecane} and xc = 0.183, Tc = 320.496 K for {dimethyl carbonate + heptadecane}, respectively. From the data collected in the near critical point, the critical exponent beta was deduced and shown to be consistent well with its theoretical value for the 3-D Ising universality class. The dependences of critical properties on the chain length of n-alkane for a series of {dimethyl carbonate + n-alkane} binary solutions were investigated. Furthermore, it was found that the asymmetric behaviors of the coexistence curve could be well described by the complete scaling theory. The contribution of the heat capacity related term to the asymmetric behaviors of the coexistence curves was discussed.
Compounds
# Formula Name
1 C3H6O3 dimethyl carbonate
2 C15H32 pentadecane
3 C17H36 heptadecane
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
  • Minimum deviations angle
  • 17
  • POMD
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minimum deviations angle
  • 9
  • POMD
  • 3
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minimum deviations angle
  • 10
  • POMD
  • 1
  • 2
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • Equal volume method
  • 1
  • POMD
  • 1
  • 2
  • Upper consolute composition: mole fraction - 2 ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Equal volume method
  • 1
  • POMD
  • 1
  • 2
  • 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
  • Minimum deviations angle
  • 32
  • POMD
  • 1
  • 2
  • 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
  • Minimum deviations angle
  • 32
  • POMD
  • 1
  • 2
  • Mole fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 32
  • POMD
  • 1
  • 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Index of refraction calibration data
  • 32
  • POMD
  • 1
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minumum deviations angle
  • 11
  • POMD
  • 1
  • 3
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • Equal volume method
  • 1
  • POMD
  • 1
  • 3
  • Upper consolute composition: mole fraction - 3 ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Equal volume method
  • 1
  • 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
  • Minimum deviations angle
  • 30
  • POMD
  • 1
  • 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
  • Minimum deviations angle
  • 30
  • 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
  • Index of refraction calibration data
  • 30
  • 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
  • Index of refraction calibration data
  • 30
  • POMD
  • 1
  • 3
  • Refractive index (other wavelength) ; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minumum deviations angle
  • 11