Vinylidene olefin process
AssigneeShell Oil Company
InventorsLynn H. Slaugh, Galeon W. Schoenthal
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Abstract
This invention relates to a process for dimerizing an alpha olefin to a vinylidene olefin which comprises contacting said alpha olefin with a catalyst comprising (a) cyclo(pentadienyl)zirconium or hafnium metallocene and (b) an aluminoxane wherein the atom ratio of Al to Zr or Hf in the catalyst ranges from about 1 to about 100.
Claims6
A process for dimerizing an alpha olefin of the general formula RCH.dbd.CH.sub.2 where R is alkyl, cycloalkyl or cycloalkenyl with a carbon number ranging from 1 to about 30 to a vinylidene olefin which process comprises contacting said alpha olefin at a temperature ranging between about -60.degree. C. to about 280.degree. C. with a catalyst comprising (a) a metallocene having the general formula (cyclopentadienyl).sub.2 MY.sub.2 wherein M is zirconium or hafnium and each Y is individually selected from the group consisting of hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.6 -C.sub.20 aryl and halogen and (b) an alumoxane, wherein the atom ratio of aluminum to M in the catalyst ranges from about 1 to about 100.
Dependencies are inferred from the claim text.