| 摘要 |
This invention is a process for making lubricating oils of a viscosity index ~ 120 and a pour point of ~ -45.degree.C by (a) oligomerizing an olefinic feedstock in the presence of a catalyst comprising an alkyl aluminium halide and an alkyl halide to form a lubricating oil, (b) separating the lubricating oil from the catalyst and (c) optionally catalytically hydrogenating the lubricating oil. The feedstock is a mixture of C7 to C9 1-olefins containing at least 30 % w/w, the mole ratio of the alkyl halide to the alkyl aluminium halide in the oligomerisation catalyst is in the range from 1.0:1 to 20:1, and the oligomerisation reaction is carried out at or below 50.degree.C.
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