| 摘要 |
<p>A dimer of a lower alpha -olefin is prepared by dimerizing a lower alpha -olefin in the presence of a catalyst comprising (A) nickel chloride, (B) a trialkylaluminum (C) at least one phosphorus compound selected from the group consisting of compounds of the formulae: PR<1>R<2>R<3> (I) P(NR<1>2)3 (II) and P(OR<1>)3 (III) wherein R<1>, R<2> and R<3> are the same or different and each represents an alkyl group, a cycloalkyl group or a phenyl group and (D) 1,1,1,3,3,3-hexafluoroisopropanol, wherein the catalyst has improved activity because of the use of nickel chloride as a nickel component, so that the amounts of expensive trialkylaluminum and hexafluoroisopropanol can be decreased and the cost of the catalyst is significantly reduced. r</p> |
