Application of Semisharp Extractive Distillation

We next discuss the examples of application of semisharp extractive distillation (Petlyuk Danilov, 2000b) for separation of ternary mixture with two binary azeotropes, examples of application of two levels of pressure, and choice of entrainers that do not form heteroazeotrpes. 

However, sharp extractive distillation is not expedient because bottom product Xb is a binary mixture with azeotrope 13. Split of extractive semisharp distillation 2 1,2,3 (xg ) is preferable. Indirect split 2,3 1, at which the top product point 

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