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L'équation NRTL pour le calcul des équilibres liquide‐liquide à n‐constituants
Author(s) -
Cohen C.,
Re H.
Publication year - 1970
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450480312
Subject(s) - non random two liquid model , thermodynamics , ternary operation , liquid liquid , chemistry , benzene , heptane , phase (matter) , cyclohexane , liquid phase , chromatography , activity coefficient , physics , organic chemistry , aqueous solution , computer science , programming language
We propose a new method for the application of the NRTL equation (1) to the representation of phase equilibria, especially between two liquid phases, of multicomponent mixtures including polar substances; it is based on the determination of the parameters from the tie‐lines in ternary liquid‐liquid equilibria. The advantage of this method is to give three parameters by pair of components, in agreement with binary phase equilibria, and to allow, without any additional parameter, the prediction of liquid‐liquid equilibria with more than three components. Comparison of calculated and experimental data shows that the prediction of quaternary liquid‐liquid equilibria is good for the two systems found in the literature: cyclohexane, benzene, isooctane, furfural (2) and water, benzene, heptane, dimethylformamide (3) .