Patents by Inventor David Mohr
David Mohr 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: 7731839Abstract: A process for reducing the Bromine Index of a hydrocarbon feedstock, the process comprising the step of contacting the hydrocarbon feedstock with a catalyst at conversion conditions, wherein the catalyst includes at least one molecular sieve and at least one clay, and wherein said catalyst is sufficient to reduce more than 50% of the Bromine Index of a hydrocarbon feedstock.Type: GrantFiled: May 27, 2005Date of Patent: June 8, 2010Assignee: Exxonmobil Chemical Patents Inc.Inventors: Stephen Harold Brown, Gary David Mohr, Michael Christopher Clark, Selma Lawrence
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Publication number: 20090030214Abstract: Peroxo-carbonates derived from molten alkali and/or Group II metal salts, particularly carbonate salts are used as catalysts in oxidation and epoxidation reactions, transition metal compounds may be included to improve the selectivity of the reactions.Type: ApplicationFiled: July 27, 2007Publication date: January 29, 2009Inventors: Helge Jaensch, Gary David Mohr
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Publication number: 20090012338Abstract: This invention relates to a process for the selective alkylation of toluene and/or benzene with an oxygen-containing alkylation agent. In particular, the process uses a selectivated molecular sieve which has been modified by the addition of a hydrogenation component, wherein at least one of the following conditions is met: (a) the selectivated molecular sieve has an alpha value of less than 100 prior to the addition of the hydrogenation component, or (b) the selectivated and hydrogenated catalyst has an alpha value of less than 100. The process of this invention provides high selectivity for the alkylated product while reducing catalyst degradation.Type: ApplicationFiled: September 10, 2008Publication date: January 8, 2009Inventors: Jihad Mohammed Dakka, John Scott Buchanan, Robert Andrew Crane, Christine Nicole Elia, Xiaobing Feng, Larry Lee Iaccino, Gary David Mohr, Brenda Anne Raich, Jose' Guadalupe Santiesteban, Lei Zhang
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Patent number: 7453018Abstract: This invention relates to a process for the selective alkylation of toluene and/or benzene with an oxygen-containing alkylation agent. In particular, the process uses a selectivated molecular sieve which has been modified by the addition of a hydrogenation component, wherein at least one of the following conditions is met: (a) the selectivated molecular sieve has an alpha value of less than 100 prior to the addition of the hydrogenation component, or (b) the selectivated and hydrogenated catalyst has an alpha value of less than 100. The process of this invention provides high selectivity for the alkylated product while reducing catalyst degradation.Type: GrantFiled: November 12, 2004Date of Patent: November 18, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jihad Mohammed Dakka, John Scott Buchanan, Robert Andrew Crane, Christine Nicole Elia, Xiaobing Feng, Larry Lee Iaccino, Gary David Mohr, Brenda Anne Raich, Jose′ Guadalupe Santiesteban, Lei Zhang
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Patent number: 7335295Abstract: There is provided a coated zeolite catalyst in which the accessibility of the acid sites on the external surfaces of the zeolite is controlled and a process for converting hydrocarbons utilizing the coated zeolite catalyst. The zeolite catalyst comprises core crystals of a first zeolite and a discontinuous layer of smaller size second crystals of a second zeolite which cover at least a portion of the external surface of the first crystals The coated zeolite catalyst finds particular application in hydrocarbon conversion processes where catalyst activity in combination with zeolite structure are important for reaction selectivity, e.g., catalytic cracking, alkylation, disproportional of toluene, isomerization, and transalkylation reactions.Type: GrantFiled: June 7, 2004Date of Patent: February 26, 2008Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jannetje Maatje van den Berge, Gary David Mohr, Kenneth Ray Clem, Wilfried Jozef Mortier, Machteld Maria Mertens, Michael C. Bradford
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Patent number: 7053258Abstract: A process is disclosed for selectively producing one or more aromatic compounds selected from benzene, toluene, para-xylene, meta-xylene, ortho-xylene, ethylbenzene and mixtures thereof from a feed containing C6–C20 hydrocarbons and/or C6–C8 alcohols. The feed is initially subjected to a chemical conversion step to increase the concentration of C6–C8 paraffin and/or olefin precursors of said one or more aromatic compounds and then resulting precursor-enriched feed is then contacted with a dehydrocyclization catalyst under conditions of temperature and hydrogen partial pressure sufficient to effect dehydrocyclization of said paraffin and/or olefin precursors. A product rich in the desired aromatic compound(s) can then be recovered from the dehydrocyclization effluent.Type: GrantFiled: October 30, 2002Date of Patent: May 30, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Xiaobing Feng, Thomas Herman Colle, Gary David Mohr
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Patent number: 7026264Abstract: There is provided a process for converting hydrocarbons using a catalyst comprising macrostructures having a three-dimensional network of particles comprised of porous inorganic material. The particles of the macrostructures occupy less than 75% of the total volume of the macrostructures and are joined together to form a three-dimensional interconnected network comprised of pores having diameters greater than about 20 ?. The macrostructures can be made by forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the inorganic material.Type: GrantFiled: April 20, 2004Date of Patent: April 11, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Gary David Mohr, Wilfried Jozef Mortier, Xiaobing Feng, Per Johan Sterte, Lubomira Borislavova Tosheva
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Patent number: 6924405Abstract: A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization reactor and the xylene isomerization catalyst is contained in the same reactor, typically a clay treater, as that used to accommodate the olefin removal catalyst. In certain cases, a single catalyst may be used to effect both xylene isomerization and olefin removal.Type: GrantFiled: June 17, 2004Date of Patent: August 2, 2005Assignee: Exxon Mobil Chemical Patents, Inc.Inventor: Gary David Mohr
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Patent number: 6864203Abstract: A process is provided for the alkylation, transalkylation, or isomerization of aromatic hydrocarbons. The processes comprises contacting aromatic hydrocarbons under conversion conditions with a zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst comprises first crystals of a first large pore zeolite which are bound together by second crystals of a second zeolite.Type: GrantFiled: February 28, 2002Date of Patent: March 8, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Dan Eldon Hendriksen, Gary David Mohr, Johannes Petrus Verduijn, Robert Scott Smith
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Patent number: 6858129Abstract: There is provided a zeolite bound zeolite catalyst which does not contain significant amount of non-zeolitic binder and can be tailored to optimize its performance and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst comprises core crystals containing first crystals of a first zeolite and optionally second crystals of a second zeolite having a composition, structure type, or both that is different from said first zeolite and binder crystals containing third crystals of a third zeolite and optionally fourth crystals of a fourth zeolite having a composition, structure type, or both that is different from said third zeolite. If the core crystals do not contain the second crystals of the second zeolite, then the binder crystals must contain the fourth crystals of the fourth zeolite. The zeolite bound zeolite finds application in hydrocarbon conversion processes, e.g.Type: GrantFiled: August 6, 2003Date of Patent: February 22, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Gary David Mohr, Kenneth Ray Clem, Wilfried Jozef Mortier, Machteld Maria Mertens, Xiaobing Feng, Marc H. Anthonis, Bart Schoofs
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Patent number: 6831203Abstract: There is provided a zeolite bound zeolite catalyst which does not contain significant amounts of non-zeolitic binder and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The catalyst comprises first zeolite, crystals, a binder comprising second zeolite crystals and a hydrogenation/dehydrogenation metal. The zeolite bound zeolite catalyst is prepared by converting the silica binder of a silica bound aggregate containing the first crystals of said first zeolite and at least a portion of the hydrogenation/dehydrogenation metal to said second zeolite. Conversion processes such as naphtha reforming xylene isomerization/ethylbenzene conversion, the zeolite bound zeolite catalyst has excellent performance when used in hydrocarbon conversion processes such as naphtha reforming and xylenes isomerization/ethylbenzene conversion.Type: GrantFiled: December 6, 1999Date of Patent: December 14, 2004Assignee: Exxon Chemical Patent Inc.Inventors: Gary David Mohr, Johannes Petrus Verduijn
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Publication number: 20040236166Abstract: A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization reactor and the xylene isomerization catalyst is contained in the same reactor, typically a clay treater, as that used to accommodate the olefin removal catalyst. In certain cases, a single catalyst may be used to effect both xylene isomerization and olefin removal.Type: ApplicationFiled: June 17, 2004Publication date: November 25, 2004Inventor: Gary David Mohr
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Patent number: 6811684Abstract: There is provided a process for converting hydrocarbons using a catalyst comprising macrostructures having a three-dimensional network of particles comprised of porous inorganic material. The particles of the macrostructures occupy less than 75% of the total volume of the macrostructures and are joined together to form a three-dimensional interconnected network comprised of pores having diameters greater than about 20 Å. The macrostructures can be made by forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the inorganic material.Type: GrantFiled: April 25, 2002Date of Patent: November 2, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Gary David Mohr, Wilfried Jozef Mortier, Xiaobing Feng, Per Johan Sterte, Lubomira Borislavova Tosheva
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Patent number: 6812181Abstract: There is provided a coated zeolite catalyst in which the accessibility of the acid sites on the external surfaces of the zeolite is controlled and a process for converting hydrocarbons utilizing the coated zeolite catalyst. The zeolite catalyst comprises core crystals of a first zeolite and a discontinuous layer of smaller size second crystals of a second zeolite which cover at least a portion of the external surface of the first crystals The coated zeolite catalyst finds particular application in hydrocarbon conversion processes where catalyst activity in combination with zeolite structure are important for reaction selectivity, e.g., catalytic cracking, alkylation, disproportional of toluene, isomerization, and transalkylation reactions.Type: GrantFiled: December 4, 2002Date of Patent: November 2, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jannetje Maatje van der Berge, Gary David Mohr, Kenneth Ray Clem, Wilfried Jozef Mortier, Machteld Maria Mertens, Michael C. Bradford
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Publication number: 20040198586Abstract: There is provided a process for converting hydrocarbons using a catalyst comprising macrostructures having a three-dimensional network of particles comprised of porous inorganic material. The particles of the macrostructures occupy less than 75% of the total volume of the macrostructures and are joined together to form a three-dimensional interconnected network comprised of pores having diameters greater than about 20 Å. The macrostructures can be made by forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the inorganic material.Type: ApplicationFiled: April 20, 2004Publication date: October 7, 2004Inventors: Gary David Mohr, Wilfried Jozef Mortier, Xiaobing Feng, Per Johan Sterte, Lubomira Borislavova Tosheva
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Patent number: 6797849Abstract: A process for isomerizing xylenes in a feed containing xylenes is disclosed which process comprises: contacting the feed with a first isomerization catalyst in a first reactor under a first set of conditions effective to isomerize xylenes in the feed; and contacting the xylenes with a second isomerization catalyst in a second reactor under a second set of conditions effective to isomerize xylenes in the feed. The second reactor is typically a clay treater and contains a further catalyst effective under the second set of conditions to remove olefins in the feed. Any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in the first reactor or in a third reactor upstream of the first and second reactors.Type: GrantFiled: November 1, 2002Date of Patent: September 28, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Timothy E. McMinn, Gary David Mohr
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Patent number: 6787023Abstract: There is provided a catalyst containing porous macrostructures comprised of: (a) a three-dimensional network of particles of porous inorganic material (e.g., zeolites); and, (b) at least one metal (e.g., a catalytically active metal). The particles of the at least one macrostructure occupy less than 75% of the total volume of the at least one macrostructure and are jointed together to form a three-dimensional interconnected network. The three-dimensional interconnected network will usually be comprised of pores having diameters greater than about 20 Å. The macrostructures can be made by forming an admixture containing a porous organic ion exchanger (e.g., a polymer-based ion exchange resin) and a synthesis mixture (e.g., for zeolite formation) capable of forming the porous inorganic material and the at least one metal; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the inorganic material.Type: GrantFiled: May 20, 2000Date of Patent: September 7, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Gary David Mohr, Wilfried Jozef Mortier, Xiaobing Feng, Per Johan Sterte, Lubomira Borislavova Tosheva
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Patent number: 6770792Abstract: A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization reactor and the xylene isomerization catalyst is contained in the same reactor, typically a clay treater, as that used to accommodate the olefin removal catalyst. In certain cases, a single catalyst may be used to effect both xylene isomerization and olefin removal.Type: GrantFiled: May 2, 2002Date of Patent: August 3, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventor: Gary David Mohr
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Publication number: 20040087823Abstract: A process for isomerizing xylenes in a feed containing xylenes is disclosed which process comprises: contacting the feed with a first isomerization catalyst in a first reactor under a first set of conditions effective to isomerize xylenes in the feed; and contacting the xylenes with a second isomerization catalyst in a second reactor under a second set of conditions effective to isomerize xylenes in the feed. The second reactor is typically a clay treater and contains a further catalyst effective under the second set of conditions to remove olefins in the feed. Any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in the first reactor or in a third reactor upstream of the first and second reactors.Type: ApplicationFiled: November 1, 2002Publication date: May 6, 2004Inventors: Timothy E. McMinn, Gary David Mohr
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Patent number: 6699811Abstract: There is provided a zeolite bound zeolite catalyst which does not contain significant amount of non-zeolitic binder and can be tailored to optimize its performance and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst comprises core crystals containing first crystals of a first zeolite and optionally second crystals of a second zeolite having a composition, structure type, or both that is different from said first zeolite and binder crystals containing third crystals of a third zeolite and optionally fourth crystals of a fourth zeolite having a composition, structure type, or both that is different from said third zeolite. If the core crystals do not contain the second crystals of the second zeolite, then the binder crystals must contain the fourth crystals of the fourth zeolite. The zeolite bound zeolite finds application in hydrocarbon conversion processes, e.g.Type: GrantFiled: May 5, 2000Date of Patent: March 2, 2004Assignee: Exxon Mobil Chemical Patents Inc.Inventors: Gary David Mohr, Kenneth Ray Clem, Wilfried Jozef Mortier, Machteld Maria Mertens, Xiaobing Feng, Marc H. Anthonis, Bart Schoofs