Chevron Phillips Chemical Company LP

Chevron Philips Chemical Company, LP

Other

Chevron Phillips Company, L.p.

Qing R Yang

Max P McDaniel

Tony R Crain

Joel L Martin

Youlu Yu

Errun Ding

Ashish M Sukhadia

Michael D Jensen

Yongwoo Inn

Richard M Buck

Albert P Masino

Matthew G Thorn

Chung Ching Tso

Mark L Hlavinka

Guylaine St Jean

Elizabeth Ann Benham

Kathy S Clear

Gary L Glass

Paul J DesLauriers

Rex E Murray

Jeremy M Praetorius

William B Beaulieu

Randy S Muninger

Kumudini Jayaratne

David C Rohlfing

Ted H Cymbaluk

Carlos A Cruz

Graham R Lief

Daniel G Hert

Kumudini C Jayaratne

Jerry T Lanier

Jim B Askew

Eric D Schwerdtfeger

Jared L Barr

Lloyd W Guatney

Kathy S Collins

Brooke L Small

Rajendra K Krishnaswamy

Alan L Solenberger

Vivek Rohatgi

Randall S Muninger

Uriah J Kilgore

Steven J Secora

Jeffrey F Greco

Connor D Boxell

John T Blagg

Kensha Marie Clark

J Todd Lanier

Ryan N Rose

Eduardo J Baralt

Eric J Netemeyer

Christopher E Wittner

Kenneth D Hope

Zhihui Gu

Anand Ramanathan

Jeff F Greco

Brooke A Gill

Steve J Secora

Jeff S Fodor

Gary G Jerdee

Gil R Hawley

Elizabeth Mary Lanier

Alfred E Brown, Jr

Mark E Kertok

Bruce E Kreischer

Timothy O Odi

John R Rathman

William M Whitte

Jinping Joe Zhou

John D Stewart

Lili Cui

George R Rajaendran

Dennis L Holtermann

Rebecca A Gonzales

Jeffrey S Fodor

Eric J Haschke

Brandy Rutledge-Ryal

William J Fisher

Mark J Lamborn

Kelly Frey

Mandi Michelle Murph

Kumi C Jayaratne

David C Rolfing

Bill Bridendolph

John D Hottovy

Carlton Edwin Ash

Steven M Bischof

Orson L Sydora

Gregory G Hendrickson

Deloris R Gagan

David A Soules

James L Smith

Daniel Halsell Ess

Gary D Jerdee

Pamela L Maeger

Melvin Hildebrand

Kumundini C Jayaratne

Jon D Ratzlaff

Susannah Lane

Richard A Hernandez

Ethylene-based polymers having a density from 0.94 to 0.96 g/cm, a Mn from 5,000 to 14,000 g/mol, a ratio of Mw/Mn from 18 to 40, and at least one of a PENT value at 2.4 MPa of at least 11,500 hr and/or a W90 from 7.5 to 15 wt. % are disclosed. Additional ethylene polymers can have the same density, Mn, and Mw/Mn values, as well as a relaxation time from 0.5 to 3.5 sec, a CY-a parameter from 0.48 to 0.68, a HLMI from 5 to 11 g/10 min, a viscosity at HLMI from 3,000 to 7,500 Pa-sec, and a higher molecular weight component (HMW) and a lower molecular weight (LMW) component, in which a ratio of the number of SCBs at Mp of the HMW component to the number of SCBs at Mp of the LMW component is from 3.5 to 8.

Dual metallocene bimodal HDPE resins with improved stress crack resistance

Methods for controlling the long chain branch content of ethylene homopolymers and copolymers produced in a polymerization process include the steps of contacting a metallocene compound, an organoaluminum compound, a high LCB activator-support, and a low LCB activator-support to form a catalyst composition, contacting the catalyst composition with ethylene and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an ethylene polymer having a LCB content, and controlling the relative amount of the high LCB activator-support and the low LCB activator-support in the catalyst composition to adjust the LCB content of the ethylene polymer.

Controlling long-chain branch content with dual activator-supports

Sulfated bentonite compositions are characterized by a total pore volume from 0.4 to 1 mL/g, a total BET surface area from 200 to 400 m/g, and an average pore diameter from 55 to 100 Angstroms. The sulfated bentonite compositions also can be characterized by a d50 average particle size in a range from 15 to 50 μm and a ratio of d90/d10 from 3 to 15. The sulfated bentonite compositions can contain a sulfated bentonite and from 10 to 90 wt. % of colloidal particles, or the sulfated bentonite compositions can contain a sulfated bentonite and from 0.2 to 10 mmol/g of zinc and/or phosphorus. These compositions can be utilized in metallocene catalyst systems to produce ethylene based polymers.

Modifications of sulfated bentonites and uses thereof in metallocene catalyst systems for olefin polymerization

Fluorided silica-coated alumina activator-supports have a bulk density from 0.15 to 0.37 g/mL, a total pore volume from 0.85 to 2 mL/g, a BET surface area from 200 to 500 m/g, an average pore diameter from 10 to 25 nm, and from 80 to 99% of pore volume in pores with diameters of greater than 6 nm. Methods of making the fluorided silica-coated alumina activator-supports and using the fluorided silica-coated aluminas in catalyst compositions and olefin polymerization processes also are described. Representative ethylene-based polymers produced using the compositions and processes have a melt index of 0.1 to 10 g/10 min and a density of 0.91 to 0.96 g/cm, and contain from 70 to 270 ppm solid oxide and from 2 to 18 ppm fluorine.

High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerization

Disclosed are metallocene compounds, catalyst compositions comprising at least one metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compound and catalyst composition are disclosed in which the metallocene contains at least one indenyl ligand, the indenyl ligand containing at least one halogenated substituent, such as a fluorinated substituent. These metallocene compounds and catalyst compositions can produce polyethylene having unexpectedly low levels of short chain branching.

Catalyst composition and method for preparing polyethylene

Disclosed herein are methods for preparing fluorided solid oxides by contacting an acidic fluorine-containing compound with an inorganic base to form an aqueous mixture having a pH of at least 4, followed by contacting a solid oxide with the aqueous mixture to produce the fluorided solid oxide. Also disclosed are methods for preparing fluorided solid oxides by contacting an acidic fluorine-containing compound with a solid oxide to produce a mixture, followed by contacting the mixture with a inorganic base to produce the fluorided solid oxide at a pH of at least about 4. The fluorided solid oxide can be used as an activator component in a catalyst system for the polymerization of olefins.

Processes for producing fluorided solid oxides and uses thereof in metallocene-based catalyst systems

Methods for preparing a metallocene-based catalyst composition that can impact the long chain branching of ethylene homopolymers and copolymers produced using the catalyst composition are described. The catalyst composition can be prepared by contacting a metallocene compound, a hydrocarbon solvent, and a first organoaluminum compound for a first period of time to form a metallocene solution, and then contacting the metallocene solution with an activator-support and a second organoaluminum compound for a second period of time to form the catalyst composition.

Processes for preparing metallocene-based catalyst systems for the control of long chain branch content

Methods for preparing metallocene-based catalyst compositions include the steps of contacting an alcohol compound and an organoaluminum compound for a first period of time to form a precontacted mixture, and contacting the precontacted mixture with an activator-support and a metallocene compound for a second period of time to form the catalyst composition. Such catalyst compositions can contain an activator-support, a metallocene compound, an organoaluminum compound, and a dialkyl aluminum alkoxide, and these catalyst compositions have increased catalytic activity for the polymerization of olefins.

Processes for preparing metallocene-based catalyst systems with an alcohol compound

Ethylene-based polymers are characterized by a density from 0.92 to 0.955 g/cm, a HLMI of less than 35 g/10 min, and a ratio of a number of short chain branches (SCBs) per 1000 total carbon atoms at Mz to a number of SCBs per 1000 total carbon atoms at Mn in a range from 11.5 to 22. These polymers can have a higher molecular weight (HMW) component and a lower molecular weight (LMW) component, in which a ratio of a number of SCBs per 1000 total carbon atoms at Mn of the HMW component to a number of SCBs per 1000 total carbon atoms at Mn of the LMW component is in a range from 10.5 to 22. These ethylene polymers can be produced using a dual catalyst system containing an unbridged metallocene compound with an indenyl group having at least one halogen-substituted hydrocarbyl substituent with at least two halogen atoms, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.

Bimodal polyethylene copolymers

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Bartlesville, OK, United States of America

Qing R Yang