Multicomponent Azeotropic Mixtures Presynthesis

The analysis of possible splits in the mode of infinite reflux with the purpose of synthesis of separation flowsheets was extended to multicomponent mixtures (Pet-lyuk, Kievskii, Serafimov, 1977a Petlyuk, Avetyan, Inyaeva, 1977 Petlyuk, 1979 Petlyuk, Kievskii, Serafimov, 1979 Baburina Platonov, 1990 Safrit Westerberg, 1997 Rooks et al., 1998 Sargent, 1998), (Doherty Malone, 2001). 

Development of trajectory tear-off theory at sharp separation and finite reflux from the boundary elements of the concentration simplex (Petlyuk Danilov, 2000a) created a general presynthesis method for multicomponent azeotropic mixtures. 

The theory of trajectory tear-off was extended to the section located between the cross-section of entrainer input and that of the main-feeding input in columns of sharp extractive distillation (Petlyuk Danilov, 1999), which included it into the general method of presynthesis. 

Presynthesis on the basis of the theory of trajectory tear-off from the boundary elements of concentration simplex takes into consideration the sharp splits important for practical usage in columns with one and two feedings that are not embraced by the methods of presynthesis on the basis of residue curve structure. In a number of cases, this manages without expensive ways of separation, without entrainers, with a minimum number of columns. 

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Petlyuk, F. B., Danilov, R. Yu. (2000a). Synthesis of Separation Flowsheets for Multicomponent Azeotropic Mixtures on the Basis of the Distillation Theory. Presynthesis Prediction of Feasible Product Compositions. Theor. Found. Chem. Eng., 34,236-254. 

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