Vapor phase polymerization with temporarily inactive titanium catalyst
AssigneeStandard Oil Company (Indiana)
InventorsGlen R. Hoff, John L. Melquist, Peter Fotis
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Abstract
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.
Claims22
The method of producing a resinous polymer of olefin by 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.
The method of producing a resinous polymer of an olefin by 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 from 25 to 95 parts by weight recycled quench liquid, and from 75 to 5 parts by weight virgin 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 polyolefin having a low level of catalyst residues.
Dependencies are inferred from the claim text.