Separation of an azeotropic mixture by distillation in a...

Details Separation of an azeotropic mixture by distillation in a... Separation of an azeotropic mixture by distillation in a...

B - Operations, Transporting

01

D

202/67

B01D 3/40 (2006.01) B01D 3/36 (2006.01)

Patent

CA 1222717

Abstract of the Disclosure: A mixture which is azeo- tropic or which behaves almost azeotropically and is difficult to separate by distillation, is separated into two pure or substantially pure fractions by distillation, by adding a further component, using a procedure which is similar to extractive distillation and is carried out in a distillation column, a section of which is divided into a feed part and a take off part by means of a separating unit which is effective in the longitudinal direction and completely or partially prevents cross-mixing of liquid streams and/or vapor streams. In this process, the azeo- tropic mixture is fed as bleed streams to the feed part and to the take off part, in each case at or near the top, and one of the two pure or substantially pure fractions is removed as a top product from the distillation column while the other is removed as a side product from the take off part.

459954

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