PROCEDIMENTO DI POLIMERIZZAZIONE IN FASE VAPORE DI OLEFINE CON CATALIZZATORE AL TITANIO TEMPORANEAMENTE INATTIVO

摘要

Vapor phase polymerization of an olefin which comprises conveying inactive high yield titanium catalyst component to a vapor phase polymerization reactor with a liquid comprising recycled quench liquid, reactivating said inactive high yield titanium catalyst component inside the reactor with a metal alkyl reducing agent and polymerizing olefin under gas phase polymerization conditions with reactivated high yield catalyst to form a resinous polymer of an olefin having a low level of catalyst residues.