Chevron Phillips Chemical Company LP

Shell Oil Comapny

Phillips Petroleum Company

Hexion Inc.

Momentive Specialty Chemicals Inc.

Hexion Specialty Chemicals, Inc.

Resolution Performance Products LLC

Westlake Olefins LLC

Carlton Edwin Ash

Max P McDaniel

Kathy S Clear

Eric D Schwerdtfeger

Jeremy M Praetorius

Carlos A Cruz

Larry S Corley

Jon F Geibel

Youlu Yu

Robert Dale Farris

Owen H Decker

Stephen L Kelly

Amanda B Allemand

Larry Steven Corley

Pui Kwan Wong

Darryl R Fahey

Dwayne R Senn

Harold D Yelton

Qing R Yang

Errun Ding

Charles C Hwo

Donald R Kelsey

Charles Lee Edwards

Lacey E Scoggins

Jamie N Sutherland

Pasquale Iacono

David A Soules

Randall S Muninger

Richard L Danforth

Anand Ramanathan

Fernando C Vidaurri

Jim B Askew

Pierre Nazareth Tutunjian

Harvey D Hensley

Jimmie J Straw

Narayana Mysore

Paul J Deslauriers

Manuel Soler Rodriguez

Dixie G Waters

Steven Lee Stewart

Wei-Teh W Shang

Paul Karol Casey

Donald H Weinkauf

Randy L Hagenson

Walter Henry Christiansen, Iii

Paul W Langemeier

Rex L Bobstein

Zhou Chen

William A St Laurent

Walter H Christiansen

Max P Mcdaniel

Catalysts and catalytic processes for the synthesis of acrylic acid and other α,β-unsaturated carboxylic acids and their salts, which are carried out in a diluent or in the absence of a diluent. In an aspect, ethylene and COcan be contacted with a Group 8-11 transition metal precursor compound or a Group 8-11 transition metal metalalactone compound in the presence of a metal-treated chemically-modified solid oxide (MT-CMSO) or a metal-treated solid oxide (MT-SO), to form a metal acrylate. As the catalytic activity wanes in either the presence or absence of a diluent, pressure cycling—that is, pressurizing the reaction system with COand an olefin such as ethylene for a time period, releasing the pressure, then re-pressurizing with COand ethylene—can rejuvenate the catalyst and restore its declining catalytic activity.

Gas phase process for acrylate production from ethylene and carbon dioxide

Supported chromium catalysts containing a solid oxide and 0.1 to 15 wt. % chromium, in which the solid oxide or the supported chromium catalyst has a particle size span from 0.5 to 1.4, less than 3 wt. % has a particle size greater than 100 μm, and less than 10 wt. % has a particle size less than 10 μm, can be contacted with an olefin monomer in a loop slurry reactor to produce an olefin polymer. Representative ethylene-based polymers produced using the chromium catalysts have a HLMI of 4 to 70 g/10 min, a density from 0.93 to 0.96 g/cm, from 150 to 680 ppm solid oxide (such as silica), from 1.5 to 6.8 ppm chromium, and a film gel count of less than 15 catalyst particle gels per ftof 25 micron thick film and/or a gel count of less than or equal to 50 catalyst particles of greater than 100 μm per five grams of the ethylene polymer.

Particle size control of supported chromium catalysts in loop slurry polymerization reactors

Catalyst compositions containing a metallocene compound, a solid activator, and a co-catalyst, in which the solid activator or the supported metallocene catalyst has a d50 average particle size of 15 to 50 &#x3bc;m and a particle size distribution of 0.5 to 1.5, can be contacted with an olefin in a loop slurry reactor to produce an olefin polymer. A representative ethylene-based polymer produced using the catalyst composition has excellent dart impact strength and low gels, and can be characterized by a HLMI from 4 to 10 g/10 min, a density from 0.944 to 0.955 g/cm, a higher molecular weight component with a Mn from 280,000 to 440,000 g/mol, and a lower molecular weight component with a Mw from 30,000 to 45,000 g/mol and a ratio of Mz/Mw ranging from 2.3 to 3.4.

Particle size control of metallocene catalyst systems in loop slurry polymerization reactors

Supported chromium catalysts containing a solid oxide and 0.1 to 15 wt. % chromium, in which the solid oxide or the supported chromium catalyst has a particle size span from 0.5 to 1.4, less than 3 wt. % has a particle size greater than 100 &#x3bc;m, and less than 10 wt. % has a particle size less than 10 &#x3bc;m, can be contacted with an olefin monomer in a loop slurry reactor to produce an olefin polymer. Representative ethylene-based polymers produced using the chromium catalysts have a HLMI of 4 to 70 g/10 min, a density from 0.93 to 0.96 g/cm, from 150 to 680 ppm solid oxide (such as silica), from 1.5 to 6.8 ppm chromium, and a film gel count of less than 15 catalyst particle gels per ftof 25 micron thick film and/or a gel count of less than or equal to 50 catalyst particles of greater than 100 &#x3bc;m per five grams of the ethylene polymer.

Silica composites and supported chromium catalysts having a bulk density of 0.08 to 0.4 g/mL, a total pore volume of 0.4 to 2.5 mL/g, a BET surface area of 175 to 375 m/g, and a peak pore diameter of 10 to 80 nm are disclosed herein. These silica composites and supported chromium catalysts can be formed by combining two silica components. The first silica component can be irregularly shaped, such as fumed silica, and the second silica component can be a colloidal silica or a silicon-containing compound, and the second silica component can act as a glue to bind the silica composite together.

Preparation of large pore silicas and uses thereof in chromium catalysts for olefin polymerization

Disclosed are metallocene compounds, catalyst compositions comprising a metallocene compound, processes for polymerizing olefins, methods for making catalyst compositions, olefin polymers and articles made from olefin polymers. In an aspect, a metallocene compounds contain a fluorenyl ligand and a cyclopentadienyl ligand which are bridged by a linking group, in which the metallocene is characterized by [1] the cyclopentadienyl ligand being substituted with a C-Cheterohydrocarbyl group having an oxygen atom positioned 5 atoms distance or less from the cyclopentadienyl ligand and [2] the linking group having a pendant C-Calkenyl group having a terminal C&#x2550;C double bond. It has been discovered that a catalyst composition comprising a metallocene compound having these features can produce polyethylene having a low melt index in the absence of a second metallocene.

Metallocene catalysts for polyethylene

Compositions and methods for forming epoxy resin are provided, and compositions and methods for forming epoxy resin composites are provided. In one embodiment, a composite comprises an epoxy resin composition comprising an epoxy resin component comprising a glycidyl ether of an aryl substituted phenolic compound, a curing agent component, and a substrate. In one embodiment, a composite comprises an epoxy resin composition comprising an epoxy resin component and a curing agent component comprising an aryl substituted phenolic compound, and a substrate.

Composites and epoxy resins based on aryl substituted compounds

Growing community of inventors

Sugar Land, TX, United States of America

Carlton Edwin Ash