Process for oligomer production and saturation
AssigneeUop LLC
InventorsPatrick S. O'Neill, Laurence 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 cycloparaffins to the oligomerization zone. The recycle of the cycloparaffins extends the catalyst activity and improves the catalyst life. Cyclohexane provides an excellent solvent for removing deposits from the catalyst with chemical inertness to the process and a boiling range that allows its essentially complete recovery when producing nonenes and higher olefins from propylene feeds.
Claims20
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/or higher carbon number olefins to an oligomerization zone and contacting the oligomerization zone feed at oligomerization conditions with an oligomerization catalyst;
- b) passing a saturate stream comprising cycloparaffins having a carbon number of at least 5 into contact with said feed and said catalyst;
- c) recovering an oligomerization effluent stream comprising said paraffins and product oligomers having 8 or more carbon atoms.
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 cyclohexane containing stream into contact with said feed and said catalyst in the oligomerization zone to maintain at least a portion of the combined cyclohexane stream and feed in liquid phase conditions in the oligomerization zone;
- c) recovering an oligomerization effluent stream comprising said cyclohexane and product oligomers comprising C.sub.9 and higher olefin 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 said cyclohexane.
Dependencies are inferred from the claim text.