CATALISATOR COMPOSIS;APPROACHING THE PROCEDURE FOR POLICY BY CATALISE OF THE TSILEN;AND PROCESSING FOR THE PREPARATION OF AN ALPHA-OLEFIN POLICY CATALIZATOR WITH A VEHICLE OF SILICA

摘要

Catalysts for the polymerization of ethylene and the copolymerization of ethylene with other olefins have been prepared by depositing an organo-chromium compound on a silica support which has been fluorided at low temperatures.