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US 5,859,159 AGranted
Dilute process for the polymerization of non-ethylene .alpha.-olefin homopolymers and copolymers using metallocene catalyst systems
AssigneeExxon Chemical Patents Inc.
InventorsAlbert Rossi, Salvatore Rea, Jon E. Stanat, Linda K. Wright, Kenneth L. Kaufman, Jeffrey W. Frederick, Robert Martin Koros, Harold Wilbur Margo
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Abstract
An improved process for the homopolymerization and copolymerization of .alpha.-olefins utilizing highly dilute .alpha.-olefin feedstreams to effect high conversions and catalyst efficiencies in the production of non-ethylene copolymers. The instant invention is particularly adaptable to polymerizing the .alpha.-olefin content of commercially available refinery feedstreams such as Raffinate-2.
Claims17
A continuous process for polymerizing olefins other than ethylene comprising:
- continuously introducing into a liquid phase of a reaction zone (i) a metallocene catalyst system and (ii) a dilute liquefied .alpha.-olefin feed stream from a refinery or a steam or catalytic cracking plant comprising at least one .alpha.-olefin and diluent, wherein said .alpha.-olefin is of the formula H.sub.2 C.dbd.CHR1, wherein R1 is an alkyl group of from 1 to 18 carbon atoms, wherein the amount of diluent is at least 30 weight percent of said feed stream;
- and continuously withdrawing polymer product from the reactor.
Dependencies are inferred from the claim text.