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US 5,990,367 AGranted
Process for oligomer production and saturation
AssigneeUop LLC
InventorsLaurence O. Stine, Brian S. Muldoon, Steven C. Gimre, Robert R. Frame
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Abstract
A process for the production of C.sub.8 and higher olefins by the oligomerization of light olefins to heavier olefins is improved by the addition of heavy paraffins to the oligomerization zone. The recycle of the heavy paraffins extends the catalyst activity and improves the catalyst life.
Claims24
An oligomerization process for the production of C.sub.8 and higher carbon number olefins, said process comprising:
- a) passing an oligomerization zone feed comprising C.sub.3 and higher olefins to an oligomerization zone and contacting the oligomerization zone feed at oligomerization conditions with an oligomerization catalyst having a value of 4.0 or more for a Hammett acidity function;
- b) passing a heavy saturate stream comprising paraffins having a carbon number of at least 6 into contact with said feed and said catalyst;
- and,
- c) recovering an oligomerization effluent stream comprising said paraffins and product oligomers having 8 or more carbon atoms.
1 more element
An oligomerization process for the production of C.sub.9 and higher carbon number oligomers, said process comprising:
- a) passing an oligomerization zone feed comprising C.sub.3 and/or C.sub.4 olefins to an oligomerization zone and contacting the oligomerization zone feed at oligomerization conditions with a solid phosphoric acid catalyst;
- b) passing a heavy saturate stream comprising C.sub.6 and higher carbon number paraffins into contact with said feed and said catalyst to the oligomerization zone to maintain at least a portion of the combined heavy saturate stream and feed in liquid phase conditions in the oligomerization zone;
- c) recovering an oligomerization effluent stream comprising said paraffins and product oligomers comprising C.sub.9 and higher olefm products;
- and,
- d) separating said oligomerization effluent stream to produce an oligomerization product stream comprising product oligomers and to recover at least a portion of the heavy saturate stream comprising said paraffins wherein the highest carbon number of the saturate stream is at least two carbon numbers lower than the lowest carbon number of the product oligomers.
2 more elements
Dependencies are inferred from the claim text.