Fina Technology, Inc.

Cryovac, Inc.

Total Research & Technology Feluy

Total Petrochemicals Research Feluy

William John Gauthier

David J Rauscher

Jun Tian

Kai Hortmann

Michel Daumerie

Shady Henry

Ronald Tharappel

Nathan Williams

Renaud Oreins

Kevin P McGovern

Michel Messiaen

David Attoe

Drew V Speer

Tim J Coffy

Kenneth Paul Blackmon

William Peyton Roberts

Margarito Lopez

Ronald D Moffitt

Joseph Thorman

Jason Clark

Constance Hayworth Patrick

Margaret Kerr

Jean-Pierre Dath

Charles R Morgan

Fengkui Li

John Ashbaugh

Lei Zhang

Robert Babrowicz

Olivier Miserque

Joseph Lyndon Thorman

Blaine C Childress

Lu Ann Kelly

Richard M Dayrit

Ruby Curtis

Galen Richard Hatfield

David Vandewiele

Donald Gordon Campbell, Jr

Mark C Douglass

W Scott Lambert

Toby Stevens

Nelson Black

George Vulpescu

Don Gordon Campbell, Jr

Francine Genin

Drew Ve Speer

Andrew W Van Putte

Crystal Bryson

Diana Nash

Joseph L Thorman

Ruby L Curtis

Scott W Lambert

A method includes transporting water containing chlorine dioxide, chlorine, chloramines, or hypochlorites through a pipe. The method includes forming a polyethylene resin using a catalyst, mixing the polyethylene resin with an antioxidant, wherein the antioxidant is a thioester, a hindered amine light stabilizer or 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene to form a resin/antioxidant mixture, extruding pipe from the resin/antioxidant mixture, and flowing water containing chlorine dioxide, chlorine, chloramines, or hypochlorites through the pipe. An extruded article is adapted for use in containment and/or transport of water that contains chlorine dioxide, chlorine, chloramines, or hypochlorites. The extruded article includes a polyethylene resin and an antioxidant. The antioxidant is a thioester, a hindered amine light stabilizer or 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene.

Chlorine-resistant polyethylene compound and articles made therefrom

A process for purifying an olefin-containing hydrocarbon feedstock comprising the steps of:

Method to purify olefin-containing hydrocarbon feedstocks

Methods of forming a catalyst, catalysts, polymerization processes and polymers formed therefrom are described herein. The method of forming a catalyst generally includes contacting an alkyl magnesium compound with an alcohol to form a magnesium alkoxide compound; contacting the magnesium alkoxide compound with a first titanium alkoxide and a first agent to form a reaction product 'A', wherein the titanium alkoxide and the first agent are nonblended individual components prior to contacting the magnesium alkoxide; and sequentially contacting the reaction product 'A' with a second agent, followed by a third agent, and subsequently a first reducing agent to form a catalyst component.

Formation of Ziegler-Natta catalyst using non-blended components

A composite may include polylactic acid, polyethylene, and optionally a compatibilizer. The composite may be formed by combining the polylactic acid with the polyethylene. The composite may be formed into an extruded article.

Composites of polyethylene and polylactic acid

Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m/g. An alkylalumoxane cocatalyst component is incorporated on the support. The isospecific metallocene is characterized by the formula:B(CpRaRb)(FlR')MQ&#x2003;&#x2003;(1)or by the formula:B&#x2032;(Cp&#x2032;R&#x2032;aR&#x2032;b)(Fl&#x2032;)M&#x2032;Q&#x2032;&#x2003;&#x2003;(2)In the formulas Cp and Cp&#x2032; are substituted cyclopentadienyl groups, Fl and Fl&#x2032; are fluorenyl groups, and B and B&#x2032; are structural bridges. R&#x2032; are substituents at the 2 and 7 positions, Ra and R&#x2032;a are substituents distal to the bridge, and Rb and R&#x2032;b are proximal to the bridge. M and M&#x2032; are transition metals, Q&#x2032; is a halogen or a C-Calkyl group; and n&#x2032; is an integer of from 0-4.

Supported metallocene catalysts

A photovoltaic cell containing at least one substrate, two electrode layers, an organic photovoltaic layer situated between the two electrode layers, and an oxygen scavenger composition.

Apparatus and method for extending polyolefin containing photovoltaic panel life span

Embodiments of the invention generally include multi-component catalyst systems, polymerization processes and heterophasic copolymers formed by the processes. The multi-component catalyst system generally includes a first catalyst component selected from Ziegler-Natta catalyst systems including a diether internal electron donor and a metallocene catalyst represented by the general formula XCpCpMA, wherein X is a structural bridge, Cpand Cpeach denote a cyclopentadienyl group or derivatives thereof, each being the same or different and which may be either substituted or unsubstituted, M is a transition metal and A is an alkyl, hydrocarbyl or halogen group and n is an integer between 0 and 4. The multi-component catalyst system further includes a second catalyst component generally represented by the formula XCpCpMA, wherein X is a structural bridge, Cpand Cpeach denote a cyclopentadienyl group or derivatives thereof, each being the same or different and which may be either substituted or unsubstituted, M is a transition metal and A is an alkyl, hydrocarbyl or halogen group and n is an integer between 0 and 4 and wherein the second catalyst component exhibits a higher ethylene response than the first catalyst component.

Multi-component catalyst systems and polymerization processes for forming in-situ heterophasic copolymers and/or varying the xylene solubles content of polyolefins

The invention is directed to a metallocene catalyst system and a process for preparing the system. The metallocene catalyst system comprises a support and metallocene bound substantially throughout the support. The selection of certain supports facilitates the production of metallocene catalyst systems having increased catalytic activity than previously recognized.

Polyolefin produced with a high performance support for a metallocene catalyst system

Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.

Method for transitioning between Ziegler-Natta and metallocene catalysts in a bulk loop reactor for the production of polypropylene

Propylene polymerization processes, polymers and films formed therefrom are described herein. The propylene polymerization processes generally include contacting propylene and an amount of ethylene with a first metallocene catalyst and a second metallocene catalyst within a polymerization reaction vessel to form a propylene based polymer, wherein the amount is an amount effective to form the propylene based polymer including from about 2 wt. % to about 6 wt. % ethylene, the second metallocene catalyst is capable of incorporating a greater amount of ethylene into the propylene based polymer than the first metallocene catalyst and wherein the first metallocene catalyst is capable of forming a propylene/ethylene random copolymer exhibiting a melting temperature that is greater than that of a propylene/ethylene random copolymer formed from the second metallocene catalyst.

Multi-component catalyst systems and polymerization processes for forming broad composition distribution polymers

The invention is directed to a metallocene catalyst system comprising an inert silica support having pores with a peak pore volume of greater than about 0.115 mL/g at a pore diameter between about 250 Angstroms and about 350 Angstroms, and an alumoxane activator, with the metallocene being bound substantially throughout the support. The activator is grafted to the support in a solvent at a reflux temperature of toluene to obtain an aluminoxane on silica, and a metallocene component is added to make a MCS having a metallocene loading of about 2 wt %. This facilitates the production of metallocene catalyst systems having increased catalytic activity than previously recognized that is at least about 20 percent higher than the catalytic activity for a metallocene loading of about 1 wt % where the activator is grafted to the support at room temperature.

Polyolefin production with a high performance support for a metallocene catalyst system

Method for transitioning between ziegler-natta and metalocene catalysts in a bulk loop reactor for the production of polypropylene

Growing community of inventors

Houston, TX, United States of America

William John Gauthier