Chevron Phillips Chemical Company LP

Phillips Petroleum Company

Agrium, Inc.

Richmond, Hitchcock, Fish & Dollar

Mitchell D Refvik

Max P McDaniel

Kathy S Clear

Eric D Schwerdtfeger

Jeremy M Praetorius

Mark L Hlavinka

Michael S Matson

Daniel M Hasenberg

Jim D Byers

Eric J Netemeyer

Colin Cameron

Anthony Colin Wright

Alastair Robert Marrion

Michael S Hankinson

Chad W Brown

Carlos A Cruz

Reza Khankal

David W Dockter

Henry Hwu

Dale M Solaas

Steven J Herron

Mark Scott

Christina M Barry

Dan M Hasenberg

James E Shaw

Ronald D Knudsen

Maruti Bhandarkar

Stan A Zisman

Baozhong Xing

Christopher Raymond Tully

Leslie L Carstens

Evan Merk

Clyde Stewart Denton

Chad E Brown

Leslie E Carstens

Max P Mcdaniel

Methods for modifying a catalyst system component are disclosed in which a feed mixture containing a fluid and from 1 to 15 wt. % of a catalyst system component is introduced into an inlet of a hydrocyclone, an overflow stream containing from 0.1 to 5 wt. % solids and an underflow stream containing from 10 to 40 wt. % solids are discharged from the hydrocyclone, and the underflow stream is spray dried to form a modified catalyst component. Often, from 4 to 20 wt. % of the catalyst system component in the feed mixture has a particle size of less than or equal to 20 μm, or less than or equal to 10 μm.

Hydrocyclone modification of catalyst system components for use in olefin polymerization

Methods for modifying a catalyst system component are disclosed in which a feed mixture containing a fluid and from 1 to 15 wt. % of a catalyst system component is introduced into an inlet of a hydrocyclone, an overflow stream containing from 0.1 to 5 wt. % solids and an underflow stream containing from 10 to 40 wt. % solids are discharged from the hydrocyclone, and the underflow stream is spray dried to form a modified catalyst component. Often, from 4 to 20 wt. % of the catalyst system component in the feed mixture has a particle size of less than or equal to 20 &#x3bc;m, or less than or equal to 10 &#x3bc;m.

A method comprising a) contacting a solvent, a carboxylic acid, and a peroxide-containing compound to form an acidic mixture wherein a weight ratio of solvent to carboxylic acid in the acidic mixture is from about 1:1 to about 100:1; b) contacting a titanium-containing compound and the acidic mixture to form a solubilized titanium mixture wherein an equivalent molar ratio of titanium-containing compound to carboxylic acid in the solubilized titanium mixture is from about 1:1 to about 1:4 and an equivalent molar ratio of titanium-containing compound to peroxide-containing compound in the solubilized titanium mixture is from about 1:1 to about 1:20; and c) contacting a chromium-silica support comprising from about 0.1 wt. % to about 20 wt. % water and the solubilized titanium mixture to form an addition product and drying the addition product by heating to a temperature in a range of from about 50&#xb0; C. to about 150&#xb0; C. and maintaining the temperature in the range of from about 50&#xb0; C. to about 150&#xb0; C. for a time period of from about 30 minutes to about 6 hours to form a pre-catalyst.

Methods of preparing a catalyst utilizing hydrated reagents

A pre-catalyst composition comprising a) a silica support comprising silica wherein an amount of silica ranges from about 70 wt. % to about 95 wt. % based upon a total weight of the silica support, b) a chromium-containing compound wherein an amount of chromium ranges from about 0.1 wt. % to about 5 wt. % based upon the amount of silica, c) a titanium-containing compound wherein an amount of titanium ranges from about 0.1 wt. % to about 20 wt. % based upon the amount of silica, d) a carboxylic acid wherein an equivalent molar ratio of titanium-containing compound to carboxylic acid ranges from about 1:1 to about 1:10, and e) a nitrogen-containing compound with a molecular formula containing at least one nitrogen atom wherein an equivalent molar ratio of titanium-containing compound to nitrogen-containing compound ranges from about 1:0.5 to about 1:10.

Disclosed are processes for purifying feed streams containing hydrogen sulfide and sulfur-containing impurities by removing sulfur-containing impurities, such as elemental sulfur and polysulfanes, using solid catalytic sorbents. Also disclosed are processes for producing hydrogen sulfide.

Processes for removing polysulfanes and elemental sulfur from hydrogen sulfide

Disclosed herein are systems and processes involving the catalyzed cleavage reaction of dimethyl sulfide to methyl mercaptan. The catalyzed cleavage reaction can be a standalone system or process, or can be integrated with a methyl mercaptan production plant.

Process for conversion of dimethyl sulfide to methyl mercaptan

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Bartlesville, OK, United States of America

Mitchell D Refvik