Fina Technology, Inc.

Mark C Douglass

David J Rauscher

Jun Tian

William John Gauthier

Kenneth Paul Blackmon

Mark Miller

Kevin P McGovern

Ronald Tharappel

Nelson Black

Joseph D Thorman

Polymerization processes are described herein. The polymerization processes generally include introducing a catalyst system to a reaction zone, introducing an olefin monomer to the reaction zone, contacting the olefin monomer with the catalyst system to form a polyolefin and contacting the polyolefin with a quench agent, wherein the quench agent is at least partially soluble in the olefin monomer.

Polypropylene having reduced residual metals

The tendency of copolymer fluff grains of propylene and ethylene to agglomerate is reduced by injecting at least one olefin comonomer, such as ethylene monomer, into more than one point along the length of the reactor, rather than injecting all of the ethylene at one point. This process reduces the tendency of copolymer fluff grains to agglomerate and cause processing problems as compared with injecting the comonomer at only one point. Copolymer made by this process is expected to have lower substantially amorphous polypropylene content and better organoleptics than copolymer made where the ethylene is injected at only one point. In one non-limiting embodiment the copolymerization reactor is a loop-type reactor.

Controlled comonomer distribution along a reactor for copolymer production

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League City, TX, United States of America

Mark C Douglass