Phillips Petroleum Company

Chevron Phillips Chemical Company LP

Harvey D Hensley

John D Hottovy

Richard L Anderson

Robert K Franklin, Iii

David J Przelomski

Ethelwoldo P Perez

Teddy H Cymbaluk

Bruce E Kreischer

Ronald D Knudsen

Lyle R Kallenbach

Warren M Ewert

Jeffrey W Freeman

Mark E Lashier

Glyndal D Cowan

Ralph V Franklin

William M Woodard

Bruce B Randolph

Scott E Kufeld

Carlton Edwin Ash

Jon F Geibel

Darryl R Fahey

Owen H Decker

Lacey E Scoggins

David H Burns

Donald W Verser

John H Tait

Fernando C Vidaurri

Jimmie J Straw

Michael E Olbrich

Paul J Deslauriers

Wei-Teh W Shang

Thomas A Reid

Teddy Cymbaluk

A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.

Olefin production process

A polymerization loop reactor including a loop reaction zone, a continuous takeoff, and a fluid slurry disposed in the reaction zone. A generally cylindrical wall defines the loop reaction zone. The length of the loop reaction zone and the nominal outside diameter of the generally cylindrical wall define a length/diameter ratio greater than 250. The reactor can be charged with a fluid slurry including an olefin monomer reactant, solid olefin polymer particles, and a liquid diluent. The concentration of the solid olefin polymer particles in the slurry can be greater than 40 weight percent based on the weight of polymer particles and the weight of liquid diluent. Also disclosed is a polymerization process carried out by polymerizing, in the loop reaction zone of a reactor as defined above, at least one olefin monomer in a liquid diluent to produce a fluid slurry as defined above.

Slurry polymerization reactor having large length/diameter ratio

An olefin polymerization process wherein monomer, diluent and catalyst are circulated in a continuous loop reactor and product slurry is recovered by means of a continuous product take off. The product slurry is exposed to a pressure drop in a flash zone, producing a second slurry and vaporized diluent. The vaporized diluent produced in said flash chamber is condensed by heat exchange, without compression.

High solids slurry polymerization using heat exchange to condense the flashed diluent

An olefin polymerization process wherein monomer, at least one olefin comonomer different from the olefin monomer, diluent and catalyst are circulated in a continuous loop reactor and product slurry is recovered by means of a continuous product take off. The continuous product allows operating the reaction at significantly higher solids content in the circulating slurry.

High polymer solids slurry polymerization employing 1-olefin comonomer

An olefin polymerization process wherein monomer, diluent and catalyst are circulated in a continuous loop reactor and product slurry is recovered by means of a continuous product take off. The continuous product allows operating the reaction at significantly higher solids content in the circulating slurry. In a preferred embodiment, the slurry is heated in a flash line heater and passed to a high pressure flash where a majority of the diluent is separated and thereafter condensed by simple heat exchange, without compression, and thereafter recycled. Also an olefin polymerization process operating at higher reactor solids by virtue of more aggressive circulation.

High solids slurry polymerization

An alkylation process for reacting alkylatable hydrocarbons in the presence of a sulfolane and hydrofluoric acid catalyst within a natural circulation reaction and circulation system.

Isoparaffin-olefin alkylation

A process is provided for producing a poly(arylene sulfide) polymer which employs at least one base as a reactant, wherein the base is contacted with the polymerization reaction mixture incrementally during the polymerization.

Process for preparing poly(arylene sulfide) polymers

A method for integrating several petroleum refining processes so as to efficiently produce tertiary alkyl ether compounds from a feed stream containing both saturated and unsaturated hydrocarbons is disclosed. An important step for forming isoolefins in the integrated process involves simultaneous catalytic conversion of an isoparaffin to an isoolefin and an n-olefin to an n-paraffin in a combination hydrogenation/dehydrogenation reactor. The thus produced isoolefin is reacted with a primary alcohol to form the desired tertiary alkyl ether compound in an ether forming process. Other conversion process included in the overall integration are an isomerization process to convert n-paraffins to isoparaffins and optionally an alkylation process to convert isoparaffins and olefins to an alkylate product.

Methyl-tertiary ether production

Growing community of inventors

Bartlesville, OK, United States of America

Harvey D Hensley