Patents by Inventor Bruce E. Kreischer
Bruce E. Kreischer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20150175719Abstract: A system and method for polymerizing olefin in a gas phase reactor into a polyolefin in presence of catalyst, measuring static charge in the reactor system; determining an indication of polyolefin fines in the reactor system, and adjusting operation of the reactor system in response to the indication.Type: ApplicationFiled: December 20, 2013Publication date: June 25, 2015Inventors: Gregory G. Hendrickson, Leonard E. Powell, Michael A. Rhodes, Joel Mutchler, Bruce E. Kreischer, Maruti Bhandarker, Rebecca A. Gonzales, Bruce H. Marantis
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Patent number: 8993822Abstract: A method of making a catalyst for use in oligomerizing an olefin comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and optionally a solvent, the method comprising contacting a composition comprising the chromium-containing compound and a composition comprising the metal alkyl, wherein the composition comprising the chromium-containing compound is added to the composition comprising the metal alkyl.Type: GrantFiled: October 4, 2010Date of Patent: March 31, 2015Assignee: Chevron Phillips Chemical Company LPInventors: Ronald D. Knudsen, Bruce E. Kreischer, Ronald G. Abbott, Steven D. Bridges, Eduardo J. Baralt, Brooke L. Small
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Patent number: 8932527Abstract: Loop reactors for olefin polymerization and processes utilizing such loop reactors are described herein. In one or more embodiments, the loop reactor generally includes a plurality of vertical sections; a plurality of elbow sections connecting the vertical sections to either a horizontal section having a horizontal length (LH) or another elbow section, at least one elbow section having an internal diameter (d), a radius (Rc) of an inner curvature and a chord length (W) and wherein the horizontal length (LH) is from 0 feet to 3 feet, the chord length (W) is 250 inches or less and a ratio (Rc/d) of the radius (Rc) of the inner curvature to the internal diameter (d) of the at least one elbow section is maintained from 2 to 4; and at least one loop reaction zone configured to polymerize an olefin monomer in the presence of a liquid diluent into a slurry comprising particles of a polyolefin polymer.Type: GrantFiled: August 17, 2014Date of Patent: January 13, 2015Assignee: Chevron Phillips Chemical Co.Inventors: Scott E. Kufeld, Joel A. Mutchler, Ralph W. Romig, John D Stewart, Catherine M Gill, Bruce E. Kreischer, John D. Hottovy
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Publication number: 20150011718Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing a polymerization product slurry from a loop polymerization reactor, conveying the polymerization product slurry through a first line comprising a continuous take-off valve to yield a mixture comprising a vapor phase, wherein the mixture exits the continuous take-off valve, and conveying the mixture through a second line comprising a flashline heater so that the mixture has a Froude number in a range from about 5 to about 100.Type: ApplicationFiled: September 22, 2014Publication date: January 8, 2015Inventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Patent number: 8921498Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.Type: GrantFiled: October 31, 2012Date of Patent: December 30, 2014Assignee: Chevron Phillips Chemical Company LPInventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Patent number: 8883940Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.Type: GrantFiled: February 27, 2013Date of Patent: November 11, 2014Assignee: Chevron Phillips Chemical Company LPInventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Publication number: 20140121335Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.Type: ApplicationFiled: February 27, 2013Publication date: May 1, 2014Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Publication number: 20140121334Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.Type: ApplicationFiled: October 31, 2012Publication date: May 1, 2014Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Patent number: 8362278Abstract: The present invention discloses processes for producing substituted pyrrole compounds, such as 2,5-disubstituted pyrroles. Synthetic processes which directly convert substituted furan compounds to substituted pyrrole compounds, via a reaction of the substituted furan compound with ammonia and/or an ammonium salt in the presence of a catalyst, also are described.Type: GrantFiled: October 1, 2010Date of Patent: January 29, 2013Assignee: Chevron Phillips Chemical Company LPInventors: Bruce E. Kreischer, Orson L. Sydora, Steven Hutchinson, Eduardo J. Baralt, Ron D. Knudsen
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Patent number: 8344198Abstract: A processes is provided to inhibit or limit the decomposition of a halide-containing olefin oligomerization catalyst system during recovery of an oligomerization product. The process includes deactivation of an olefin oligomerization catalyst system present in an olefin oligomerization reactor effluent stream by contact with an alcohol under conditions that minimize potential for deactivated catalyst system decomposition. Such conditions include minimization of the water content of the deactivation agent and concentration of the deactivation agent.Type: GrantFiled: March 15, 2004Date of Patent: January 1, 2013Assignee: Chevron Phillips Chemical Company LPInventors: Warren M. Ewert, Bruce E. Kreischer, Ronald D. Knudsen
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Patent number: 8329608Abstract: A method of making a catalyst for use in oligomerizing an olefin, comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and optionally a solvent, the method comprising abating all or a portion of water, acidic protons, or both from a composition comprising the chromium-containing compound, a composition comprising the pyrrole-containing compound, a composition comprising a non-metal halide-containing compound, a composition comprising the solvent, or combinations thereof prior to contact thereof with a composition comprising a metal halide-containing compound.Type: GrantFiled: March 28, 2008Date of Patent: December 11, 2012Assignee: Chevron Phillips Chemical Company LPInventors: Ronald D. Knudsen, Bruce E. Kreischer, Ronald G. Abbott, Steven D. Bridges, Brooke L. Small
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Publication number: 20120083609Abstract: The present invention discloses processes for producing substituted pyrrole compounds, such as 2,5-disubstituted pyrroles. Synthetic processes which directly convert substituted furan compounds to substituted pyrrole compounds, via a reaction of the substituted furan compound with ammonia and/or an ammonium salt in the presence of a catalyst, also are described.Type: ApplicationFiled: October 1, 2010Publication date: April 5, 2012Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Bruce E. Kreischer, Orson L. Sydora, Steven Hutchinson, Eduardo J. Baralt, Ron D. Knudsen
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Patent number: 8049052Abstract: A method of deactivate a catalyst system is described. The method may include contacting a reactor effluent comprising a catalyst system, an oligomerized olefin, and diluent with a kill agent to at least partially deactivate the catalyst system, separating the reactor effluent into one or more first streams comprising oligomerized olefin and diluent, the one or more first streams being substantially devoid of the at least partially deactivated catalyst, and a second stream comprising the deactivated catalyst; and contacting the second stream with a quench agent.Type: GrantFiled: October 30, 2009Date of Patent: November 1, 2011Assignee: Chevron Phillips Chemical Company LPInventors: Bruce E Kreischer, Orson L Sydora, Ronald D Knudsen
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Patent number: 7994376Abstract: Provided is a method of oligomerizing alpha olefins. In an embodiment, an oligomerization catalyst system is contacted in at least one continuous reactor with a feed comprising olefins; an effluent comprising product olefins having at least four carbon atoms is withdrawn from the reactor; the oligomerization catalyst system comprises iron or cobalt, or combinations thereof; and the single pass conversion of ethylene is at least about 40 weight percent among product olefins having at least four carbon atoms. In another embodiment, the single pass conversion of ethylene comprises at least about 65 weight percent among product olefins having at least four carbon atoms. In another embodiment, product olefins of the effluent having twelve carbon atoms comprise at least about 95 weight percent 1-dodecene. In another embodiment, product olefins comprise at least about 80 weight percent linear 1-alkenes.Type: GrantFiled: June 8, 2009Date of Patent: August 9, 2011Assignee: Chevron Phillips Chemical Company LPInventors: Brooke L. Small, Bruce E. Kreischer
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Patent number: 7910670Abstract: A method of making an olefin oligomerization catalyst, comprising contacting a chromium-containing compound, a heteroatomic ligand, and a metal alkyl, wherein the chromium-containing compound comprises less than about 5 weight percent chromium oligomers. A method of making an olefin oligomerization catalyst comprising a chromium-containing compound, a nitrogen-containing compound, and a metal alkyl, the method comprising adding a composition comprising the chromium-containing compound to a composition comprising the metal alkyl. A method of making an olefin oligomerization catalyst comprising a chromium-containing compound, a nitrogen-containing compound, and a metal alkyl, the method comprising abating all or a portion of water, acidic protons, or both from a composition comprising the chromium-containing compound, a composition comprising the nitrogen-containing compound, or combinations thereof prior to or during the preparation of the catalyst.Type: GrantFiled: August 3, 2009Date of Patent: March 22, 2011Assignee: Chevron Phillips Chemical Company LPInventors: Ronald D. Knudsen, Ronald G. Abbott, Bruce E. Kreischer, Eduardo J. Baralt, Brooke L. Small
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Publication number: 20110021343Abstract: A method of making a catalyst for use in oligomerizing an olefin comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and optionally a solvent, the method comprising contacting a composition comprising the chromium-containing compound and a composition comprising the metal alkyl, wherein the composition comprising the chromium-containing compound is added to the composition comprising the metal alkyl.Type: ApplicationFiled: October 4, 2010Publication date: January 27, 2011Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Ronald D. Knudsen, Bruce E. Kreischer, Ronald G. Abbott, Steven D. Bridges, Eduardo J. Baralt, Brooke Small
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Patent number: 7820581Abstract: A method of making a catalyst for use in oligomerizing an olefin comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and optionally a solvent, the method comprising contacting a composition comprising the chromium-containing compound and a composition comprising the metal alkyl, wherein the composition comprising the chromium-containing compound is added to the composition comprising the metal alkyl.Type: GrantFiled: October 30, 2007Date of Patent: October 26, 2010Assignee: Chevron Phillips Chemical Company LPInventors: Ronald D. Knudsen, Bruce E. Kreischer, Ronald G. Abbott, Steven D. Bridges, Eduardo J. Baralt, Brooke L. Small
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Patent number: 7718838Abstract: 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.Type: GrantFiled: December 12, 2006Date of Patent: May 18, 2010Assignee: Chevron Phillips Chemical Company LPInventors: William M. Woodard, Warren M. Ewert, Harvey D. Hensley, Mark E. Lashier, Glyndal D. Cowan, Jeffrey W. Freeman, Ralph V. Franklin, Ronald D. Knudsen, Richard L. Anderson, Lyle R. Kallenbach, Bruce E. Kreischer
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Publication number: 20100113851Abstract: A method of deactivate a catalyst system is described. The method may include contacting a reactor effluent comprising a catalyst system, an oligomerized olefin, and diluent with a kill agent to at least partially deactivate the catalyst system, separating the reactor effluent into one or more first streams comprising oligomerized olefin and diluent, the one or more first streams being substantially devoid of the at least partially deactivated catalyst, and a second stream comprising the deactivated catalyst; and contacting the second stream with a quench agent.Type: ApplicationFiled: October 30, 2009Publication date: May 6, 2010Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Bruce E. Kreischer, Orson L. Sydora, Ronald D. Knudsen
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Publication number: 20100113257Abstract: A system and method for preparing and using a metal precursor diluent composition are described. The composition includes a metal precursor, and about 18% to about 80% by weight of an olefinic diluent having between 6 and 18 carbon atoms. Such compositions may be used in oligomerization catalyst systems.Type: ApplicationFiled: October 30, 2009Publication date: May 6, 2010Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Bruce E. Kreischer, Ronald D. Knudsen, Orson L. Sydora