Patent ID: 7692049

Claim:
A process for producing a hydrocarbon composition, the process consisting essentially of: (a) contacting a feed comprising at least one C 3 to C 8 olefin and an olefinic recycle stream with a molecular sieve catalyst in a reactor under olefin oligomerization conditions such that the recycle to feed weight ratio is about 0.5 to about 2.0, the WHSV is at least 1.5 based on the olefin in the feed, and the difference between the highest and lowest temperatures within the reactor is 40° F. (22° C.) or less, said contacting producing a oligomerization effluent stream; and (b) separating said oligomerization effluent stream into at least a hydrocarbon product stream and said olefinic recycle stream, wherein the olefinic recycle stream contains no more than 10 wt. % of C 10 + non-normal olefins, and the hydrocarbon product stream contains at least 1 wt. % and no more than 30 wt. % of C 9 non-normal olefins.