| 摘要 |
Linear olefins having 10 to 24 carbon atoms can be oligomerized to form synthetic lubricant base stocks by means of acidic calcium montmorillonite clay having a moisture content up to 20 wt%, a residual acidity of up to 30 mg KOH/g, and a surface area of 300 M<2>/g or greater. In a preferred embodiment, a Lewis acid such as aluminium nitrate is deposited on the clay. The linear olefins can be alpha olefins, internal olefins or mixtures thereof, or the linear olefins can be co-oligomerized with propylene, with 1,3-diisopropenylbenzene or alpha-methylstyrene, or with vinylidene olefins. The oligomers are preferably hydrogenated to improve their stability. |
