TWO-STAGE THERMAL SYNTHESIS OF LUBRICATING OIL FROM ALPHA OLEFINS

摘要

A synthetic lubricating oil of high viscosity index is obtained by a two-stage thermal polymerization process wherein the feedstock for the polymerization comprises a mixture of linear alpha-olefins that can be obtained from the steam cracking of a paraffin wax, a petroleum gas oil or a solvent extracted petroleum distillate. The more reactive impurities such as diolefins and triolefins are removed in the first polymerization stage, thereby ensuring the absence of relatively low V.I. components in the product of the second stage.