Dow Global Technolgoies LLC

Jeffrey A Sims

Pradeep Jain

Kurt Frederick Hirsekorn

Roger L Kuhlman

Gary Robert Marchand

Sean W Ewart

David M Pearson

Alec Y Wang

Andrew T Heitsch

Angela N Taha

Anthony J Castelluccio

Lindsey A Clark

Brandon Fails

Jeffrey J Dean

Larry S Green

Chris E Blaschke

Linfeng Chen

Mehmet Demirors

Jian Jim Wang

Rajen M Patel

Peter N Nickias

David Gordon Barton

Sharon Baker

Mingzhe Yu

Tianzi Huang

Jian Wang

Matthew Lehr

Robert N Cotton

Robert Cotton

Larry Shayne Green

Lindsey Anne Miller

Chris Blaschke

The catalyst system includes a heterogeneous procatalyst, an electron donor, and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula CpTiXTiCpor CpTiX. In formula CpTiX, each Cp is a cyclopentadienyl substituted with at least one R, wherein Ris (C-C)alkyl; and each X is independently monoanionic or neutral, wherein each X is independently (C-C)hydrocarbon, (C-C)heterohydrocarbon, (C-C)hydrocarbyl, (C-C)heterohydrocarbyl, or a halogen atom.

Polymerization catalysts for production of polyethylene with high molecular weight

The catalyst system includes a heterogeneous procatalyst and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula CpTiX, In formula CpTiX, each Cp is a cyclopentadienyl substituted with at least one R, wherein Ris (C-C)alkyl; and each X is independently a halogen atom.

Polymerization of ethylene in solution processes using a Ziegler-Natta catalyst and a hydrogenation catalyst

A heterogeneous procatalyst includes a preformed heterogeneous procatalyst and a metal-ligand complex. The preformed heterogeneous procatalyst includes a titanium species and a magnesium chloride (MgCl) support. The metal-ligand complex has a structural formula (L)M(Y)(XR), where M is a metal cation; each L is a neutral ligand or (═O); each Y is a halide or (C-C)alkyl; each XRis an anionic ligand in which X is a heteroatom or a heteroatom-containing functional group and Ris (C-C)hydrocarbyl or (C-C) heterohydrocarbyl; n is 0, 1, or 2; m is 0-4; and b is 1-6. The metal-ligand complex is overall charge neutral. The heterogeneous procatalyst exhibits improved average molecular weight capability. A catalyst system includes the heterogeneous procatalyst and a cocatalyst. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

Ziegler-Natta catalyst with an electron donor compound for increasing polymer molecular weight

New ethylene polymers having low levels of long chain branching are disclosed. Films and film layers made form these polymers have good hot tack strength over a wide range of temperatures, making them good materials for packaging applications.

Ethylenic polymer and its use

Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following:

Processes to control fouling and improve compositions

Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following: (1) reacting said metal alkyl compound with an acid to produce a soluble metal ester; or (2) adding an ionic surfactant; or (3) adding a mixture comprising an antioxidant to the product under conditions sufficient to avoid formation of significant amounts of insoluble metal or metal compounds derived from said metal alkyl compound; or (4) purging said post-reactor heat exchanger with an inert gas under conditions to remove metal oxide from the post-reactor heat exchanger.

Growing community of inventors

Lake Jackson, TX, United States of America

Jeffrey A Sims