Process for producing higher hydrocarbons from lower olefins
AssigneeAtlantic Richfield Company
InventorsHarry Mazurek, John A. Sofranko
Life of this patent
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Abstract
The process of the invention comprises contacting a lower olefin contaminated with an impurity such as a diene at oligomerization conditions with either a mixture of oligomerization catalyst and at least one of a methathesis catalyst and an alkaline earth oxide, or precontacting the contaminated lower olefin with methathesis catalyst, optionally combined with alkaline earth oxide, and subsequently oligomerizing the lower olefin.
Claims12
In a process for the oligomerization of a lower olefin contaminated with a minor amount of a diene or methyl acetylene oligomerization catalyst deactivating agent, the improvement which comprises
- (a) contacting the contaminated lower olefin with an admixture of zeolitic oligomerization catalyst and at least one of a metathesis catalyst and an alkaline earth oxide at oligomerization conditions, or
- (b) contacting the contaminated lower olefin with a metathesis catalyst at metathesis conditions and thereafter contacting the olefin with a zeolitic oligomerization catalyst at oligomerization conditions.
In a process for the oligomerization of a lower olefin contaminated with a minor amount of a conjugated diene oligomerization catalyst deactivating agent, the improvement which comprises contacting the contaminated lower olefin with an admixture of a zeolitic oligomerization catalyst and at least one of a transition metal metathesis catalyst and an alkaline earth oxide at oligomerization conditions.
In a process for the oligomerization of a lower olefin contaminated with a minor amount of a conjugated diene oligomerization catalyst deactivating agent, the improvement which comprises contacting the contaminated lower olefin with a transition metal metathesis catalyst and thereafter contacting the olefin with a zeolitic oligomerization catalyst at oligomerization conditions.
In a process for the oligomerization of a feedstock containing ethylene and contaminated with 1 ppm to about 1% by weight of 1,3 butadiene, the improvement which comprises contacting said feedstock at 150.degree. to 370.degree. C. and 1 to 70 atmospheres pressure with
- (a) an admixture of a zeolitic oligomerization catalyst and at least one of a transition metal metathesis catalyst and an alkaline earth oxide, or
- (b) a transition metal metathesis catalyst and thereafter with a zeolitic oligomerization catalyst.
Dependencies are inferred from the claim text.