Patents by Inventor Keith Holroyd Kuechler
Keith Holroyd Kuechler 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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Patent number: 9365474Abstract: Disclosed herein are processes for producing phenol. The processes include oxidizing cyclohexylbenzene to produce an oxidation composition comprising cyclohexyl-1-phenyl-1-hydroperoxide. The cyclohexyl-1-phenyl-1-hydroperoxide in the oxidation composition may undergo a cleavage reaction to produce a cleavage reaction mixture comprising phenol, cyclohexanone and at least one contaminant. The cleavage reaction mixture may be contacted with a basic material to convert at least a portion of the contaminant to a converted contaminant, thereby producing a modified reaction mixture.Type: GrantFiled: August 16, 2011Date of Patent: June 14, 2016Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, Francisco Manuel Benitez, Kun Wang, James R. Lattner, Christopher Lynn Becker
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Patent number: 8884068Abstract: Disclosed herein is a process for producing phenol. The process includes oxidizing at least a portion of a feed comprising cyclohexylbenzene to produce an oxidation composition comprising cyclohexyl-1-phenyl-1-hydroperoxide. The oxidation composition may then be cleaved in the presence of an acid catalyst to produce a cleavage reaction mixture comprising the acid catalyst, phenol and cyclohexanone. At least a portion of the cleavage reaction mixture may be neutralized with a basic material to form a treated cleavage reaction mixture. In various embodiments, the cleavage reaction mixture contains 1 wt % to 30 wt % phenol, 1 wt % to 30 wt % cyclohexanone and a complexation product.Type: GrantFiled: August 16, 2011Date of Patent: November 11, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, Francisco Manuel Benitez
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Publication number: 20130231506Abstract: Disclosed herein is a process for producing phenol. The process includes oxidizing at least a portion of a feed comprising cyclohexylbenzene to produce an oxidation composition comprising cyclohexyl-1-phenyl-1-hydroperoxide. The oxidation composition may then be cleaved in the presence of an acid catalyst to produce a cleavage reaction mixture comprising the acid catalyst, phenol and cyclohexanone. At least a portion of the cleavage reaction mixture may be neutralized with a basic material to form a treated cleavage reaction mixture. In various embodiments, the cleavage reaction mixture contains 1 wt % to 30 wt % phenol, 1 wt % to 30 wt % cyclohexanone and a complexation product.Type: ApplicationFiled: August 16, 2011Publication date: September 5, 2013Applicant: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, Francisco Manuel Benitez
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Publication number: 20130225866Abstract: Disclosed herein are processes for producing phenol. The processes include oxidizing cyclohexylbenzene to produce an oxidation composition comprising cyclohexyl-1-phenyl-1-hydroperoxide. The cyclohexyl-1-phenyl-1-hydroperoxide in the oxidation composition may undergo a cleavage reaction to produce a cleavage reaction mixture comprising phenol, cyclohexanone and at least one contaminant. The cleavage reaction mixture may be contacted with a basic material to convert at least a portion of the contaminant to a converted contaminant, thereby producing a modified reaction mixture.Type: ApplicationFiled: August 16, 2011Publication date: August 29, 2013Applicant: ExxonMobil Chemical Company - Law TechnologyInventors: Keith Holroyd Kuechler, Francisco Manuel Benitez, Kun Wang, James R. Lattner, Christopher Lynn Becker
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Publication number: 20130204045Abstract: Described herein are compositions having (a) at least 99 wt % cyclohexanone; and (b) 0.1 wppm to 1000 wppm of at least one of cyclohexanedione and hydroxycyclohexanone. The wt % and wppm are based upon the total weight of the composition. The compositions may further comprise 0.1 wppm to 1000 wppm of cyclohexanol.Type: ApplicationFiled: August 16, 2011Publication date: August 8, 2013Inventors: Keith Holroyd Kuechler, Francisco Manuel Benitez
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Patent number: 7803332Abstract: The invention is directed to a reactor system comprising at least one reactor wherein makeup water for said system is preheated by water/steam exiting said reactor. In a preferred embodiment the system comprises plural reactors and the invention provides for each reactor to independently achieve isothermal operating conditions.Type: GrantFiled: May 31, 2005Date of Patent: September 28, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Stephen Harold Brown, Paul Hamilton, Keith Holroyd Kuechler
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Patent number: 7396971Abstract: This invention is to a method and system for operating a hydrocarbon conversion process. A two stage reactor system is used in which the gas superficial velocity of the second reaction stage is greater than that in the first reaction stage. The first reaction stage operates at more continuous stirred tank reactor (CSTR) like characteristics, and the second reaction stage operates at more plug flow reactor (PFR) like characteristics.Type: GrantFiled: August 1, 2002Date of Patent: July 8, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jeffrey S. Smith, Keith Holroyd Kuechler, Nicolas P. Coute, Rathna P. Davuluri, David C. Skouby
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Patent number: 7385099Abstract: The present invention is directed to a hydrocarbon conversion apparatus and process. The apparatus comprises the following: a plurality of riser reactors, each having a first end into which a catalyst is fed, a second end through which the catalyst can exit, and optionally a center axis extending therebetween. The apparatus also includes a separation zone having a plurality of inlets, each inlet not being oriented along the center axes of the riser reactors, the separation zone being provided to separate the catalyst from products of a reaction conducted in the hydrocarbon conversion apparatus. A plurality of deviating members are also provided, each deviating member being in fluid communication between the second end of a respective riser reactor and a respective inlet of the separation zone. The apparatus also includes a catalyst retention zone provided to contain catalyst, which is fed to the riser reactors.Type: GrantFiled: June 14, 2006Date of Patent: June 10, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, James R. Lattner, Nicolas P. Coute, Jeffrey S. Smith, Justin Leonard Krieger
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Patent number: 7378562Abstract: The present invention is a process for removing alkynes and/or dienes from an olefin product stream withdrawn from an oxygenate-to-olefins reactor. The process comprises hydrogenating a first olefin stream that has alkynes and/or dienes in the presence of excess hydrogen and a first hydrogenation catalyst. The hydrogenation of the first olefin stream produces a second olefin stream that has unreacted hydrogen. The second olefin stream is contacted with a second hydrogenation catalyst producing a third olefin stream. The third olefin stream has low levels of hydrogen and alkynes and/or dienes.Type: GrantFiled: September 7, 2006Date of Patent: May 27, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, David R. Lumgair, Jr.
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Patent number: 7256318Abstract: This invention is directed to controlling regenerator temperature in an oxygenate to olefin process. Because a significant amount of heat can produced in the regenerator during the regeneration process, at least a portion of the heat must be removed to keep the system from getting too hot. This invention removes heat during the regeneration of the catalyst, using appropriate circulation of catalyst between the reactor and the regenerator. Sufficient circulation can eliminate the need for the use of a catalyst cooler in the regeneration system.Type: GrantFiled: March 28, 2003Date of Patent: August 14, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Lattner, Keith Holroyd Kuechler, Nicolas P. Coute, Paul N. Chisholm
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Patent number: 7227048Abstract: The present invention provides a process for making an olefin product from an oxygenate-containing feedstock comprising: a) contacting the feedstock in a reaction zone with catalyst particles comprising a molecular sieve containing acid sites and having an average coke loading of 1 to 10 carbon atoms per acid site of said molecular sieve, under conditions effective to convert the feedstock into an olefin product stream and to provide unregenerated catalyst particles, b) removing a portion of said catalyst particles from said reaction zone and contacting said portion with a regeneration medium in a regeneration zone under conditions effective to obtain regenerated catalyst particles which have an average coke loading of no greater than 10 carbon atoms per acid site of said molecular sieve, and c) introducing said regenerated catalyst particles into said reaction zone to provide a catalyst mixture of unregenerated catalyst particles and regenerated catalyst particles, in an amount sufficient to provide an averaType: GrantFiled: August 26, 2002Date of Patent: June 5, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Paul N. Chisholm, Nicolas P. Coute, James R. Lattner, Teng Xu, Jeffrey S. Smith, Keith Holroyd Kuechler
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Patent number: 7115789Abstract: The present invention is a process for removing alkynes and/or dienes from an olefin product stream withdrawn from an oxygenate-to-olefins reactor. The process comprises hydrogenating a first olefin stream that has alkynes and/or dienes in the presence of excess hydrogen and a first hydrogenation catalyst. The hydrogenation of the first olefin stream produces a second olefin stream that has unreacted hydrogen. The second olefin stream is contacted with a second hydrogenation catalyst producing a third olefin stream. The third olefin stream has low levels of hydrogen and alkynes and/or dienes.Type: GrantFiled: March 28, 2003Date of Patent: October 3, 2006Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, David R. Lumgair, Jr.
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Patent number: 7090081Abstract: The present invention provides various processes for selectively removing undesirably sized catalyst particles from a reaction system. In one embodiment, a plurality of catalyst particles, having a first median particle diameter, is withdrawn from the reaction system and is directed to a separation unit such as a counter flow cyclone separator. In the separation unit, the particles are separated into a small catalyst stream and a large catalyst stream, the small catalyst stream having a second median particle diameter less than the first median particle diameter, and the large catalyst stream having a third median particle diameter greater than the first median particle diameter. At least a portion of the small or large catalyst stream is then directed back to the reaction system in order to maintain a desirable particle size distribution therein.Type: GrantFiled: September 5, 2003Date of Patent: August 15, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Stephen Neil Vaughn, Kenneth Ray Clem, Keith Holroyd Kuechler, James R. Lattner
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Patent number: 7084319Abstract: The present invention provides various processes for fluidizing molecular sieve catalyst compositions in a fluidized bed reaction system. The invention comprises fluidizing a molecular sieve catalyst composition with a reactive fluidizing medium under conditions effective to convert at least a portion of the fluidizing medium to additional product. The invention is ideally suited for implementation into an oxygenate to olefin reaction system, in which the fluidizing medium optionally comprises byproducts of the oxygenate to olefin conversion reaction.Type: GrantFiled: December 5, 2003Date of Patent: August 1, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, Nicolas P. Coute, Jeffrey Scott Smith, Stephen Harold Brown, Richard B. Hall, Teng Xu, Stephen Nell Vaughn
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Patent number: 7083762Abstract: The present invention is directed to a hydrocarbon conversion apparatus and process. The apparatus comprises the following: a plurality of riser reactors, each having a first end into which a catalyst is fed, a second end through which the catalyst can exit, and optionally a center axis extending therebetween. The apparatus also includes a separation zone having a plurality of inlets, each inlet not being oriented along the center axes of the riser reactors, the separation zone being provided to separate the catalyst from products of a reaction conducted in the hydrocarbon conversion apparatus. A plurality of deviating members are also provided, each deviating member being in fluid communication between the second end of a respective riser reactor and a respective inlet of the separation zone. The apparatus also includes a catalyst retention zone provided to contain catalyst, which is fed to the riser reactors.Type: GrantFiled: January 8, 2003Date of Patent: August 1, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Keith Holroyd Kuechler, James R. Lattner, Nicolas P. Coute, Jeffrey S. Smith, Justin Leonard Krieger
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Patent number: 7053260Abstract: The present invention provides a process for making an olefin product from an oxygenate feedstock which comprises: a) contacting the feedstock in a reaction zone with a catalyst comprising i) a molecular sieve having defined pore openings and ii) a CO oxidation metal, under conditions effective to convert the feedstock into an olefin product stream comprising C2–C3 olefins and to form carbonaceous deposits on the catalyst so as to provide a carbon-containing catalyst; b) contacting at least a portion of the carbon-containing catalyst with a regeneration medium comprising oxygen in a regeneration zone comprising a fluid bed regenerator having a dense fluid phase and a dilute fluid phase under conditions effective to obtain a regenerated catalyst portion, wherein the difference between the temperature of the dilute phase and the temperature of the dense phase is no greater than 100° C.; c) introducing said regenerated catalyst portion into said reaction zone; and d) repeating steps a)–c).Type: GrantFiled: June 13, 2002Date of Patent: May 30, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Teng Xu, Paul N. Chisholm, Stephen Neil Vaughn, Shun Chong Fung, Keith Holroyd Kuechler, James R. Lattner, Kenneth Ray Clem, Patrick J. Maher, Dean C. Draemel
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Patent number: 6987208Abstract: The present invention provides a process for removing oxygenate impurities, e.g., dimethyl ether, from an olefinic product stream by converting the oxygenate impurity to a compound whose boiling point differs by at least about 5° C. from the oxygenate impurity. Typically, the compound is more readily removable from the product stream than the oxygenate impurity.Type: GrantFiled: January 21, 2004Date of Patent: January 17, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael A. Risch, Teng Xu, John Di-Yi Ou, Keith Holroyd Kuechler, James H. Beech, James Richardson Lattner, Cor F. Van Egmond
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Publication number: 20040192993Abstract: This invention is directed to controlling regenerator temperature in an oxygenate to olefin process. Because a significant amount of heat can produced in the regenerator during the regeneration process, at least a portion of the heat must be removed to keep the system from getting too hot. This invention removes heat during the regeneration of the catalyst, using appropriate circulation of catalyst between the reactor and the regenerator. Sufficient circulation can eliminate the need for the use of a catalyst cooler in the regeneration system.Type: ApplicationFiled: March 28, 2003Publication date: September 30, 2004Inventors: James R. Lattner, Keith Holroyd Kuechler, Nicolas P. Coute, Paul N. Chisholm
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Publication number: 20040192982Abstract: The present invention is a process for removing alkynes and/or dienes from an olefin product stream withdrawn from an oxygenate-to-olefins reactor. The process comprises hydrogenating a first olefin stream that has alkynes and/or dienes in the presence of excess hydrogen and a first hydrogenation catalyst. The hydrogenation of the first olefin stream produces a second olefin stream that has unreacted hydrogen. The second olefin stream is contacted with a second hydrogenation catalyst producing a third olefin stream. The third olefin stream has low levels of hydrogen and alkynes and/or dienes.Type: ApplicationFiled: March 28, 2003Publication date: September 30, 2004Inventors: Keith Holroyd Kuechler, David R. Lumgair
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Publication number: 20040152938Abstract: The present invention provides a process for removing oxygenate impurities, e.g., dimethyl ether, from an olefinic product stream by converting the oxygenate impurity to a compound whose boiling point differs by at least about 5° C. from the oxygenate impurity. Typically, the compound is more readily removable from the product stream than the oxygenate impurity.Type: ApplicationFiled: January 21, 2004Publication date: August 5, 2004Inventors: Michael A. Risch, Teng Xu, John Di-Yi Ou, Keith Holroyd Kuechler, James H. Beech, James Richardson Lattner, Cor F. Van Egmond