PREPARATION OF MODIFIED AND ACTIVATED CHROMOCENE CATALYSTS FOR ETHYLENE POLYMERIZATION

摘要

ABSTRACT OF THE DISCLOSUREEthylene polymerization catalysts are preparedby depositing a chromocene compound on a support witha titanium compound find activating the final blendat 300°C. to about 1005°C. A fluoriding agent can beoptionally added where a narrower molecular weight dis-tribution of the polyethylene to be obtained isdesired. Catalysts with good reproducibility, whenprepared by this method, show particular utility inproduction of polyethylene by a fluid bed process.