GAS PHASE POLYMERISATION PROCESS

摘要

The present invention relates to a continuous process for the polymerization of an alpha-olefin having from 2 to 12 carbon atoms, which is carried out in a gas phase polymerization reactor by bringing a gaseous reaction mixture containing the alpha-olefin to be polymerized into contact with a catalyst based on chromium oxide associated with a catalyst based on chromium oxide associated with a granular support and activated by a heat treatment in which the polymerization reactor is fed with (a) alpha-olefin and (b) catalyst at constant rates.