Multistage system for converting olefins to heavier hydrocarbons
Patent
·
OSTI ID:5747589
This patent describes a continuous multi-stage catalytic reactor system for converting ethene-rich lower olefinic feedstock to heavier liquid hydrocarbon product, comprising: primary stage reactor means for contacting the lower olefinic feedstock at elevated temperature and moderate pressure in a primary stage higher severity reaction zone with shape selective medium pore zeolite oligomerization catalyst to convert at least a portion of the lower olefin to intermediate olefinic hydrocarbons; means for cooling primary stage oligomerization reaction effluent from the high severity reaction zone to condense at least a portion of the intermediate hydrocarbons; first phase separation means for separating the cooled and partially condensed high severity reactor effluent stream in a primary phase separation zone into a light gas phase stream comprising unreacted light olefin and a condensed liquid intermediate hydrocarbon stream; pump means for pressurizing the intermediate liquid stream from the primary stage for a high pressure second stage; secondary reactor means for contacting the pressurized intermediate liquid stream with shape selective medium pore zeolite oligomerization catalyst in a secondary stage distillate mode catalytic reaction zone at elevated temperature and high pressure to provide a heavier hydrocarbon effluent stream comprising distillate and lighter hydrocarbons; means for flashing and cooling the secondary stage effluent stream.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4834949
- OSTI ID:
- 5747589
- Country of Publication:
- United States
- Language:
- English
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