A MULTI-STAGE PROCESS FOR PRODUCING HIGH VISCOSITY INDEX LUBRICANT RANGE HYDROCARBONS

摘要

In a process for converting lower olefinic feed to heavier hydrocarbons by contacting the feed with a shape selective medium pore acidic zeolite catalyst at elevated temperature and pressure the catalyst surface is rendered relatively inactive by adding to the olefinic feed an inactivating amount of a sterically-hindered organic base, whereby the catalyst is selectively surface-deactivated, to produce substantially linear heavier hydrocarbons rich in C10 + olefins.