| 摘要 |
A process for dimerizing an alpha-olefin of the general formula RCH=CH2, where R is alkyl, cycloalkyl, or cycloalkenyl with a carbon number ranging from 1 to about 30, to a vinylidene olefin comprises contacting said alpha-olefin at temperatures between about -60 DEG C. to and 280 DEG C. with a catalyst comprising (a) a metallocene having the general formula (cyclopentadienyl)nMY4-n wherein n=2 or 3, M is titanium, zirconium or hafnium and each Y is individually selected from hydrogen, C1-C5 alkyl, C6-C20 aryl, C2-C20 alkoxy, C2-C20 ester, and halogen, (b) an alkylaluminoxane other than methyl-aluminoxane, and (c) trimethyl aluminum.
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