Sequence for separating propylene from cracked gases

Details Sequence for separating propylene from cracked gases Sequence for separating propylene from cracked gases

C - Chemistry, Metallurgy

07

C

C07C 11/06 (2006.01) C07C 7/04 (2006.01) C10G 70/02 (2006.01) C10G 70/04 (2006.01) F25J 3/02 (2006.01)

Patent

CA 2096141

A process sequence for treating cracked gases of heavy feedstocks which preferentially produces propylene to the exclusion of propane, butanes and butenes. The process eliminates the need for a depropanizer with the attendant savings in capital and op- erating costs. In lieu of a conventional C3 splitter, the process features a depropylenizer, i.e. a distillation tower designed to sepa- rate propylene from propane, butanes and butenes. A hydrogenation unit to eliminate contaminants can be placed upstream of the depropylenizer or the depropylenizer can be split into two sections with the hydrogenation unit located between the two sec- tions.

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