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

Liquid-Liquid Coexistence Curves of Dimethyl Carbonate + Hexadecane and Dimethyl Carbonate + Octadecane in the Critical Region

Huang, M.[Meijun], Chen, Z.[Zhiyun], Yin, T.[Tianxiang], Bai, Y.[Yongliang], An, X.[Xueqin], Shen, W.[Weiguo]
J. Chem. Eng. Data 2010, 55, 10, 4378-4384
ABSTRACT
The liquid-liquid coexistences of temperature vs refractive index (T-n), temperature vs mole fraction (T-x), and temperature vs volume fraction (T-) for dimethyl carbonate + hexadecane and dimethyl carbonate + octadecane have been determined within 10 K from the critical temperatures. The critical amplitudes B and the critical exponents ss have been deduced from the coexistence curves. The results have also been analyzed to determine Wegner correction terms and to examine the asymmetric behavior of the diameters of the coexistence curves. Experimental values of ss are consistent with the 3D Ising value in the whole temperature range investigated for (T-n) and (T-), while the tendency of crossover to the mean field value was detected for (T-x). The data of coexistence curves (T-x) were fitted with the crossover equation proposed by Anisimov and Sengers to obtain the crossover parameters. It was found that the contribution of the regular term was significant as the temperature was far away from the critical point and the value of effective critical exponent increased with the distance from the critical point, exhibiting the monotonic crossover from the Ising to the mean-field critical behaviors.
Compounds
# Formula Name
1 C3H6O3 dimethyl carbonate
2 C16H34 hexadecane
3 C18H38 octadecane
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
  • 12
  • POMD
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 11
  • POMD
  • 3
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 1
  • POMD
  • 2
  • 1
  • Refractive index (Na D-line) ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Standard Abbe refractometry
  • 33
  • POMD
  • 2
  • 1
  • Refractive index (Na D-line) ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Standard Abbe refractometry
  • 33
  • POMD
  • 2
  • 1
  • Upper consolute temperature, K ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Derived from index of refraction data
  • 1
  • 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
  • 33
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Index of refraction calibration data
  • 33
  • POMD
  • 2
  • 1
  • Upper consolute composition: mole fraction - 1 ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Derived from index of refraction data
  • 1
  • 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
  • 89
  • POMD
  • 3
  • 1
  • Refractive index (Na D-line) ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Standard Abbe refractometry
  • 30
  • POMD
  • 3
  • 1
  • Refractive index (Na D-line) ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Standard Abbe refractometry
  • 30
  • 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
  • 11
  • POMD
  • 3
  • 1
  • Upper consolute temperature, K ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Derived from index of refraction data
  • 1
  • POMD
  • 3
  • 1
  • Mole fraction - 1 ; 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
  • 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
  • 30
  • POMD
  • 3
  • 1
  • Upper consolute composition: mole fraction - 1 ; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Derived from index of refraction data
  • 1