C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
23/400, 260/711.
C07C 2/12 (2006.01) B01J 8/24 (2006.01) C07C 2/00 (2006.01) C07C 11/02 (2006.01)
Patent
CA 1286695
MANUFACTURE OF DISTILLATE HYDROCARBONS FROM LIGHT OLEFINS IN STAGED REACTORS ABSTRACT A semi-continuous multi-stage catalytic technique for converting lower olefinic feedstock to heavier liquid hydrocarbon product. The invention provides methods and means for: a) contacting alkene-rich feedstock at high space velocity elevated temperature in a continuous primary stage reaction zone with shape selective medium pore zeolite oligomerization catalyst particles to convert at least a portion of the lower olefinic components to intermediate olefinic hydrocarbons, said primary stage catalyst having an average acid cracking activity of about 0.1 to 20; b) cooling primary stage oligomerization reaction effluent from the primary stage reaction zone to condense at least a portion of the intermediate hydrocarbons, separating the cooled and partially condensed primary reactor effluent stream in a primary phase separation zone into a light gas phase stream comprising light hydrocarbons and a condensed liquid intermediate hydrocarbon stream; and c) contacting at least an intermediate effluent portion from the primary stage with shape selective medium pore zeolite oligomerization catalyst in a high pressure fixed bed secondary stage distillate mode catalytic reactor system at elevated temperature and high pressure to provide a heavier hydrocarbon effluent stream comprising distillate hydrocarbons, said secondary stage catalyst having an acid cracking activity of at least 5. A simplified second stage reactor system permits the use of one or more fixed bed reactors to be operated intermittently.
569889
Harandi Mohsen Nadimi
Owen Hartley
Kirby Eades Gale Baker
Mobil Oil Corporation
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