| abstract |
The invention relates to preparation of lubricating oil base oil, in particular to a preparation method of low-viscosity poly- α -olefin, which at least comprises the following steps of adding olefin with 6-18 carbon atoms under the action of a catalyst, reacting for 4-6h at the temperature of 140-160 ℃, and performing aftertreatment to obtain the low-viscosity poly- α -olefin, wherein the catalyst is an immobilized perfluoroalkyl sulfonic acid catalyst. |