Method for recovering crude 1,3-butadiene by extractive...

Details Method for recovering crude 1,3-butadiene by extractive... Method for recovering crude 1,3-butadiene by extractive...

C - Chemistry, Metallurgy

07

C

C07C 11/167 (2006.01) B01D 3/40 (2006.01) C07C 7/08 (2006.01)

Patent

CA 2437396

The invention relates to a method for recovering crude 1,3-butadiene by extractive distillation from a C4 cut, using a selective solvent in a separation column (TK). In said column, a partition wall (T) is located in the longitudinal direction of the column, forming a first sub-section (A), a second sub-section (B) and a lower common column zone (C). An extractive scrubber column (K) is connected upstream of the separation column.

L'invention concerne un procédé pour extraire du 1,3-butadiène brut par distillation extractive dans une fraction C¿4? au moyen d'un solvant sélectif dans une colonne à paroi de séparation (TK) dans laquelle une paroi de séparation (T) est placée dans le sens longitudinal de la colonne de manière à former une première zone partielle (A), une deuxième zone partielle (B) et une zone commune inférieure (C). Une colonne de lavage extractif (K) est montée en amont de ladite colonne à paroi de séparation.

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