Union Carbide Chemicals & Plastics Technology Corporation

Univation Technologies, LLC

Paul T Daniell

Mark Gregory Goode

John Francis Szul

Simon Mawson

Matthew Gary McKee

Kersten Anne Erickson

David James Schreck

Clark Curtis Williams

Thomas Edward Spriggs

Frederick John Karol

Kevin Joseph Cann

Sun-Chueh Kao

Burkhard Eric Wagner

Arakalgud V Ramamurthy

William D Heitz

Michael William Tilston

Thomas James McNeil

Gregory Mark Goode

This invention relates to methods to introduce multiple catalysts, activators or catalyst systems into a gas phase reactor.

Solution feed of multiple catalysts

Start up methods for multiple catalyst systems

A mixed catalyst composition comprising a) a solid Ziegler-Natta catalyst; b) a liquid single site catalyst; and c) at least one activating cocatalyst is provided. Polymers having a broad or bimodal molecular weight distribution may be made with this catalyst composition.

Mixed catalyst composition for the production of olefin polymers

A gas phase process for the production of a polyethylene blend comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system including an activator and a cocatalyst in each of two fluidized bed reactors connected in series, under polymerization conditions, with the provisos that:

Process of producing ethylene polymer blends in gas phase

A process comprising continuously contacting with a catalyst, under polymerization conditions, ethylene or a mixture comprising ethylene and one or more alpha-olefins in a first fluidized bed reactor and a mixture comprising ethylene and one or more alpha-olefins in a second fluidized bed reactor, the first and second reactors being connected in series, said catalyst comprising:

High density, high molecular weight polyethylene

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Tornado, WV, United States of America

Paul T Daniell