Isoplethic Method to Estimate Critical Lines for Binary Fluid Mixtures from Subcritical Vapor−Liquid Equilibrium:  Application to the Azeotropic Mixtures R32 + C3H8and R125 + C3H8

2001 ◽  
Vol 40 (21) ◽  
pp. 4610-4614 ◽  
Author(s):  
Lambert J. Van Poolen ◽  
Cynthia D. Holcomb ◽  
James C. Rainwater
Keyword(s):  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Binary Fluid ◽  
Fluid Mixtures ◽  
Azeotropic Mixtures ◽  
Binary Fluid Mixtures ◽  
Critical Lines ◽  
Vapor Liquid

scholarly journals Evaluation of the possibility of separating commercial phenol from the phenolic fraction of coal tar

2021 ◽  
Vol 266 ◽  
pp. 02011
Author(s):  
Y.O. Schastnyy ◽  
N.A. Romanova ◽  
R.R. Gizatullin
Keyword(s):  
Coal Tar ◽  
Component Composition ◽  
Technological Scheme ◽  
Technological Parameters ◽  
Liquid Equilibrium ◽  
Phenolic Fraction ◽  
Vapor Liquid Equilibrium ◽  
Nrtl Model ◽  
Azeotropic Mixtures ◽  
Vapor Liquid

This article is about the possibility of concentrating commercial coal phenol with a concentration of 99% by the weight method of rectification from the phenolic fraction of coal tar. The sufficiency of phenol is ensured by the kumol method, however, the consumption of phenol increases. Modeling of the vapor-liquid equilibrium of double and triple mixtures of components using the NRTL model showed the presence of the following positive homogeneous azeotropic mixtures: phenol-indane, phenol-indene. Modeling of the vapor-liquid equilibrium of double and triple mixtures of components using the NRTL model showed the presence of the following positive homogeneous azeotropic mixtures: phenol-indane, phenol-indene. The compositions and temperatures of these azeotropes are determined. The authors propose the isolation of phenol from the fraction and its purification from indane and indene by a clear rectification method. The technological scheme consisting of four devices is based on the analysis of the component composition of the initial mixture and the existing azeotropes. Modeling of the technological scheme showed that this scheme provides the release of phenol by 99% of the mass, which meets the requirements for coal phenol. After optimizing the technological parameters of the distillation columns, the estimated extraction costs will amount to 5.64 Gcal per ton of commercial phenol.

Quadrupolar binary fluid mixtures critical lines from a hard‐sphere Lennard‐Jones quadrupolar molecular model

1987 ◽  
Vol 86 (11) ◽  
pp. 6432-6437 ◽  
Author(s):  
O. H. Scalise ◽  
G. J. Zarragoicoechea ◽  
A. E. Rodríguez ◽  
R. D. Gianotti
Keyword(s):  
Hard Sphere ◽  
Molecular Model ◽  
Binary Fluid ◽  
Fluid Mixtures ◽  
Lennard Jones ◽  
Binary Fluid Mixtures ◽  
Critical Lines
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