Catalytic conversion system for oligomerizing olefinic...

Details Catalytic conversion system for oligomerizing olefinic... Catalytic conversion system for oligomerizing olefinic...

C - Chemistry, Metallurgy

07

C

23/400, 260/676

C07C 2/12 (2006.01) C07C 9/02 (2006.01) C07C 11/02 (2006.01) C10G 50/00 (2006.01)

Patent

CA 1215079

CATALYTIC CONVERSION SYSTEM FOR OLIGOMERIZING OLEFINIC FEEDSTOCK TO PRODUCE HEAVIER HYDROCARBONS Abstract An improved continuous catalytic process is provided for oligomerizing lower olefins to heavier hydrocarbons wherein a continuous liquid olefinic feedstream is diluted with a liquid alkane stream. Such a process is improved by a technique which comprises cooling catalytically converted effluent, fractionating the effluent to obtain a condensed lower aliphatic recycle stream, a liquid C3-C4 product stream, a liquid product stream consisting essentially of C5+ hydrocarbons and a gaseous C2- gaseous stream, by the sequential fractionation steps of: debutanizing the cooled effluent to obtain the liquid C5+ hydrocarbon stream and a condensed lower aliphatic stream; de-ethanizing a portion of the lower aliphatic stream to recover gaseous offgas stream and a C3-C4 alkane product stream; and recycling at least a portion of the condensed aliphatic stream from the debutanizing step for dilution of the olefinic feedstream. An apparatus arrangement for conducting such an improved process is also disclosed.

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