Group Vi Metal Patents (Class 585/420)
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Patent number: 11746070Abstract: The present disclosure provides processes to convert paraffins to corresponding olefins and or heavier hydrocarbons. In at least one embodiment, a process includes introducing, at a temperature of from about 50° C. to about 500° C., a hydrocarbon feed comprising paraffins to a first metal oxide comprising one or more group 1 to group 17 metal and one or more oxygen. The process includes obtaining a product mixture comprising one or more C3-C50 cyclic olefins, one or more C2-C50 acyclic olefins, one or more C5-C200 hydrocarbons, such as one or more C5-C100 hydrocarbons, or a mixture thereof. In at least one embodiment, the product mixture is substantially free of H2 (e.g., <500 ppm). The introducing can reduce the first metal oxide to form a second metal oxide. Processes may include introducing the second metal oxide to an oxidizing agent to form the first metal oxide.Type: GrantFiled: November 25, 2019Date of Patent: September 5, 2023Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANYInventors: Kun Wang, Jonathan E. Mitchell
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Patent number: 11613506Abstract: According to one or more embodiments presently disclosed, a method for processing a chemical stream may include contacting a feed stream with a catalyst in a reactor portion of a reactor system that includes a reactor portion and a catalyst processing portion. Contacting the feed stream with the catalyst may cause a reaction forming an effluent. The method may include separating the effluent stream from the catalyst, passing the catalyst to the catalyst processing portion, and processing the catalyst in the catalyst processing portion. Processing the catalyst may include passing the catalyst to a combustor, combusting a supplemental fuel stream in the combustor to heat the catalyst, and treating the heated catalyst with an oxygen-containing gas. The supplemental fuel stream may include at least 1 mol % of one or more hydrocarbons, and a weight ratio of catalyst to hydrocarbons in the combustor may be at least 300:1.Type: GrantFiled: October 7, 2021Date of Patent: March 28, 2023Assignee: Dow Global Technologies LLCInventors: Matthew T. Pretz, Hangyao Wang, Lin Luo
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Patent number: 10487026Abstract: Disclosed are a catalytic method and system for producing aromatic hydrocarbons from aliphatic hydrocarbons or light naphtha. In an aspect, the process comprises adding a diluent comprising a heavy aromatic hydrocarbon (for example, C7-C9+) to a reactor feedstock comprising aliphatic hydrocarbons (for example, C6-C8) or light naphtha to form a reactor feed stream, such that the heat capacity of reactor feed stream is higher than the heat capacity of feedstock. The reactor feed stream is heated and contacting with a catalyst under conditions sufficient to aromatize at least a portion of the aliphatic hydrocarbons and form a product stream comprising a primary aromatic hydrocarbon product and a heavy aromatic hydrocarbon product. In an aspect, the diluent can comprise a heavy aromatic hydrocarbon having at least one carbon atom more than the primary aromatic hydrocarbon product.Type: GrantFiled: April 13, 2018Date of Patent: November 26, 2019Assignee: Chevron Phillips Chemical Company LPInventor: Eric P. Weber
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Patent number: 10392320Abstract: Described herein are methods useful for preparing alkylaromatics.Type: GrantFiled: June 9, 2016Date of Patent: August 27, 2019Assignee: Rutgers, The State University of New JerseyInventors: Alan S. Goldman, Andrew M. Steffens, William Schinski
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Patent number: 8785704Abstract: The present invention relates to a process for nonoxidatively dehydroaromatizing a reactant stream comprising C1-C4-aliphatics by converting the reactant stream in the presence of a catalyst in a reaction zone 1 to a product stream P comprising aromatic hydrocarbons, and regenerating the catalyst whose activity has been reduced by deposited coke with a hydrogen-comprising mixture H in a reaction zone 2, wherein at least a portion of the deposited coke is converted to methane and at least a portion of the methane formed is fed to reaction zone 1.Type: GrantFiled: May 20, 2009Date of Patent: July 22, 2014Assignee: BASF SEInventors: Frank Kiesslich, Achim Gritsch, Christian Schneider, Albena Kostova
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Publication number: 20140073828Abstract: A catalyst for converting methane to aromatic hydrocarbons is described herein. The catalyst comprises an active metal or a compound thereof, zinc or a compound thereof and an inorganic oxide support wherein the active metal is added to the support as a metal oxalate. A method of making the catalyst and a method of using the catalyst are also described.Type: ApplicationFiled: January 24, 2012Publication date: March 13, 2014Inventors: Armin Lange De Oliveira, Larry Lanier Marshall, Peter Tanev Tanev
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Patent number: 8563794Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of extending the life of an aromatization catalyst comprising predicting a rapid deactivation threshold (RDT) for an aromatization reactor by employing the catalyst in a reactor system under an accelerated fouling condition to identify a test rapid deactivation threshold (t-RDT), predicting the RDT for the aromatization reactor based upon the t-RDT, and oxidizing the catalyst prior to the predicted RDT to extend the Time on Stream of the aromatization catalyst.Type: GrantFiled: September 13, 2012Date of Patent: October 22, 2013Assignee: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Patent number: 8558045Abstract: A catalyst for aromatizing a lower hydrocarbon, in order to increase the amount of production of useful aromatic compounds, such as benzene and toluene, by improving the methane conversion rate, the benzene formation rate, the naphthalene formation rate and the BTX formation rate (or a total formation rate of benzene, toluene and xylene) is such that molybdenum and silver are loaded on a metallosilicate as a substrate. It is more preferable to obtain the aromatizing catalyst by loading molybdenum and silver after modifying a zeolite formed of the metallosilicate with a silane compound that has a molecular diameter larger than a pore diameter of the zeolite and that has an amino group, which selectively reacts at a Bronsted acid point of the zeolite, and a straight-chain hydrocarbon group.Type: GrantFiled: March 28, 2008Date of Patent: October 15, 2013Assignee: Meidensha CorporationInventors: Shinichi Yamada, Tomohiro Yamada, Yuji Ogawa, Takuya Hatagishi, Yo Yamamoto, Yoshio Sugiyama
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Patent number: 8552236Abstract: A catalyst for the conversion of methane to higher hydrocarbons including aromatic hydrocarbons comprises particles of a porous refractory material, crystals of a zeolite material grown within the pores of the refractory material, and at least one catalytically active metal or metal compound associated with the zeolite crystals.Type: GrantFiled: September 22, 2010Date of Patent: October 8, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventor: Larry L. Iaccino
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Publication number: 20130066126Abstract: The present invention relates to a method for producing a zeolite catalyst useful for aromatization of a lower alkane, a zeolite catalyst useful for aromatization of a lower alkane obtainable by said method and a process for aromatization of a lower alkane using the zeolite catalyst of the present invention.Type: ApplicationFiled: May 17, 2011Publication date: March 14, 2013Applicant: SAUDI BASIC INDUSTRIES CORPORATIONInventor: Suman Kumar Jana
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Patent number: 8288603Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst.Type: GrantFiled: December 7, 2010Date of Patent: October 16, 2012Assignee: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Patent number: 8278237Abstract: A catalyst for producing aromatic compounds from lower hydrocarbons while improving activity life stability of methane conversion rate; benzene formation rate; naphthalene formation rate; and total formation rate of benzene, toluene and xylene is formed by loading molybdenum and copper on metallo-silicate serving as a substrate and then calcining the metallo-silicate. When the catalyst is reacted with a reaction gas containing lower hydrocarbons and carbonic acid gas, aromatic compounds are produced. In order to obtain the catalyst, it is preferable that molybdenum and copper are loaded on zeolite formed of metallo-silicate after the zeolite is treated with a silane compound larger than a pore of the zeolite in diameter and having an amino group and a straight-chain hydrocarbon group, the amino group being able to selectively react with the zeolite at a Bronsted acid point of the zeolite. It is preferable that a loaded amount of molybdenum is within a range of from 2 to 12 wt.Type: GrantFiled: February 13, 2008Date of Patent: October 2, 2012Assignee: Meidensha CorporationInventors: Shinichi Yamada, Tomohiro Yamada, Yuji Ogawa, Hirokazu Akiyama, Takuya Hatagishi
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Patent number: 8148590Abstract: A process for producing aromatic hydrocarbons and hydrogen, in which a lower hydrocarbons-containing feedstock gas is reformed by being supplied to and being brought into contact with a catalyst under high temperature conditions thereby forming aromatic hydrocarbons and hydrogen. The method includes the steps of (a) supplying a hydrogen gas together with the feedstock gas during a supply of the feedstock gas; and (b) suspending the supply of the feedstock gas for a certain period of time while keeping a condition of a supply of the hydrogen gas. The catalyst is exemplified by a metallo-silicate carrying molybdenum and a metallo-silicate carrying molybdenum and rhodium. An amount of the hydrogen gas supplied together with the feedstock gas is set to be preferably larger than 2% and smaller than 10%, more preferably within a range of from 4 to 8%, much more preferably 8%.Type: GrantFiled: July 28, 2005Date of Patent: April 3, 2012Assignees: Meidensha CorporationInventors: Masaru Ichikawa, Ryoichi Kojima, Yuji Ogawa, Masamichi Kuramoto
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Patent number: 8084658Abstract: Process for the integrated preparation of aromatics and ammonia by reaction of a gas stream A comprising at least one C1-C6-aliphatic and nitrogen in the presence of at least one catalyst, wherein the C1-C6-aliphatics are converted nonoxidatively into aromatics in one reaction and the hydrogen liberated in this reaction is reacted with nitrogen to form ammonia in a further reaction.Type: GrantFiled: November 22, 2007Date of Patent: December 27, 2011Assignee: BASF SEInventors: Ulrich Mueller, Harald Freiberger
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Patent number: 7977519Abstract: In a process for converting methane to higher hydrocarbons including aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert said methane to aromatic hydrocarbons. A first portion of the catalyst is transferred from the reaction zone to a heating zone, where the first catalyst portion is heated by contacting the catalyst with hot combustion gases generated by burning a supplemental source of fuel. The heated first catalyst portion is then returned to the reaction zone.Type: GrantFiled: February 8, 2010Date of Patent: July 12, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
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Patent number: 7951985Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert the methane to aromatic hydrocarbons. The reaction zone is contained within a reactor and the reactor or an internal component of the reactor has at least one surface that is chemically exposed to the feed and is formed from a refractory material that exhibits a carbon uptake (mass of carbon absorbed per unit of exposed metal surface area) of less than 25 g/m2 when exposed to mixture of 50 vol % methane and 50 vol % H2 at 900° C. for 168 hours.Type: GrantFiled: January 6, 2011Date of Patent: May 31, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Neeraj Sangar, Larry L. Iaccino, Jeffrey P. Jones
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Patent number: 7893308Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert the methane to aromatic hydrocarbons. The reaction zone is contained within a reactor and the reactor or an internal component of the reactor has at least one surface that is chemically exposed to the feed and is formed from a refractory material that exhibits a carbon uptake (mass of carbon absorbed per unit of exposed metal surface area) of less than 25 g/m2 when exposed to mixture of 50 vol % methane and 50 vol % H2 at 900° C. for 168 hours.Type: GrantFiled: August 13, 2007Date of Patent: February 22, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Neeraj Sangar, Larry L. Iaccino, Jeffrey P. Jones
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Patent number: 7888543Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) comprises providing a hydrocarbon feedstock containing methane and a catalytic particulate material to a reactor system having at least first and second reaction zones connected in series. Each of the reaction zones is operated under reaction conditions sufficient to convert at least a portion of the methane to said higher hydrocarbon(s) and is maintained in a moving bed fashion, with the bulk of the catalytic particulate material being moved from the first reaction zone to the second reaction zone and with the bulk of the hydrocarbon feedstock being moved from the second reaction zone to the first reaction zone.Type: GrantFiled: December 18, 2009Date of Patent: February 15, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar
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Patent number: 7868217Abstract: A method of extending the life of an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst, and oxidizing the catalyst prior to reaching the RDT. A method of aromatizing a hydrocarbon comprising identifying a rapid deactivation threshold (RDT) for an aromatization catalyst, and operating an aromatization reactor comprising the catalyst to extend the Time on Stream of the reactor prior to reaching the RDT. A method of characterizing an aromatization catalyst comprising identifying a rapid deactivation threshold (RDT) of the catalyst.Type: GrantFiled: November 14, 2007Date of Patent: January 11, 2011Assignee: Chevron Phillips Chemical Company LPInventors: Scott H. Brown, Tin-Tack Peter Cheung, Daniel P. Hagewiesche, Baiyi Zhao
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Publication number: 20100331592Abstract: A catalyst for the conversion of methane to higher hydrocarbons including aromatic hydrocarbons comprises a support and molybdenum or a compound thereof dispersed on the support. The support comprises an aluminosilicate zeolite combined with a binder selected from silica, titania, zirconia and mixtures thereof. The catalyst is substantially free of aluminum external to the framework of the aluminosilicate zeolite.Type: ApplicationFiled: December 22, 2008Publication date: December 30, 2010Inventors: Neeraj Sangar, Jocelyn A. Kowalski, Larry L. Iaccino, Kenneth R. Clem
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Publication number: 20100185034Abstract: Provided is a process for producing an aromatic hydrocarbon using a molybdenum-containing solid catalyst, more specifically a process for producing an aromatic hydrocarbon efficiently from a lower hydrocarbon gas essentially containing methane by activating the molybdenum-containing solid catalyst with maintaining a high yield for a long period of time. The process comprises a pre-contacting step of allowing a molybdenum-containing solid catalyst to contact with a pre-contacting gas comprising at least one selected from a lower hydrocarbon and a hydrogen gas; and a reaction step of allowing the pre-contacted catalyst to contact with a raw material gas essentially containing methane, to generate an aromatic hydrocarbon, wherein the starting temperature in the pre-contacting step is lower than the reaction temperature, and the temperature during the pre-contacting step from the beginning to the end is not over the reaction temperature.Type: ApplicationFiled: July 31, 2008Publication date: July 22, 2010Inventors: Toru Nishimura, Shinobu Aoki, Yan Liu
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Patent number: 7728186Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions including a first maximum temperature effective to convert the methane to aromatic hydrocarbons and generate coke on the catalyst. A portion of the coked catalyst is transferred from the reaction zone to a separate regeneration zone, where the catalyst portion is contacted with a regeneration gas under conditions including a second maximum temperature less than or equal to the first maximum temperature and effective to at least partially remove coke from the catalyst portion. Before being returned to the reaction zone, the regenerated catalyst portion is contacted with a carburizing gas in a catalyst treatment zone separate from the reaction zone at a third maximum temperature less than the first maximum temperature.Type: GrantFiled: April 5, 2007Date of Patent: June 1, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
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Patent number: 7683227Abstract: In a process for converting methane to higher hydrocarbons including aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert said methane to aromatic hydrocarbons. A first portion of the catalyst is transferred from the reaction zone to a heating zone, where the first catalyst portion is heated by contacting the catalyst with hot combustion gases generated by burning a supplemental source of fuel. The heated first catalyst portion is then returned to the reaction zone.Type: GrantFiled: April 21, 2006Date of Patent: March 23, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
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Patent number: 7659437Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) comprises providing a hydrocarbon feedstock containing methane and a catalytic particulate material to a reactor system having at least first and second reaction zones connected in series. Each of the reaction zones is operated under reaction conditions sufficient to convert at least a portion of the methane to said higher hydrocarbon(s) and is maintained in a moving bed fashion, with the bulk of the catalytic particulate material being moved from the first reaction zone to the second reaction zone and with the bulk of the hydrocarbon feedstock being moved from the second reaction zone to the first reaction zone.Type: GrantFiled: March 29, 2007Date of Patent: February 9, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar
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Publication number: 20100016647Abstract: A catalyst for producing aromatic compounds from lower hydrocarbons while improving activity life stability of methane conversion rate; benzene formation rate; naphthalene formation rate; and total formation rate of benzene, toluene and xylene is formed by loading molybdenum and copper on metallo-silicate serving as a substrate and then calcining the metallo-silicate. When the catalyst is reacted with a reaction gas containing lower hydrocarbons and carbonic acid gas, aromatic compounds are produced. In order to obtain the catalyst, it is preferable that molybdenum and copper are loaded on zeolite formed of metallo-silicate after the zeolite is treated with a silane compound larger than a pore of the zeolite in diameter and having an amino group and a straight-chain hydrocarbon group, the amino group being able to selectively react with the zeolite at a Bronsted acid point of the zeolite. It is preferable that a loaded amount of molybdenum is within a range of from 2 to 12 wt.Type: ApplicationFiled: February 13, 2008Publication date: January 21, 2010Applicant: MEIDENSHA CORPORATIONInventors: Shinichi Yamada, Tomohiro Yamada, Yuji Ogawa, Hirokazu Akiyama, Takuya Hatagishi
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Patent number: 7589246Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane and a particulate catalytic material are supplied to a reaction zone operating under reaction conditions effective to convert at least a portion of the methane to aromatic hydrocarbons and to deposit carbonaceous material on the particulate catalytic material causing catalyst deactivation. At least a portion of the deactivated particulate catalytic material is removed from the reaction zone and is heated to a temperature of about 700° C. to about 1200° C. by direct and/or indirect contact with combustion gases produced by combustion of a supplemental fuel. The heated particulate catalytic material is then regenerated with a hydrogen-containing gas under conditions effective to convert at least a portion of the carbonaceous material thereon to methane and the regenerated catalytic particulate material is recycled back to the reaction zone.Type: GrantFiled: March 3, 2008Date of Patent: September 15, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Larry L. Iaccino, Teng Xu, J. Scott Buchanan, Neeraj Sangar, Jeremy J. Patt, Mark A. Nierode, Kenneth R. Clem, Mobae Afeworki
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Publication number: 20080177119Abstract: This invention is for a catalyst for conversion of a hydrocarbonaceous feed. The catalyst is a zeolite aluminosilicate with a silicon to aluminum molar ratio from about 70:1 to about 100:1 on which a noble metal has been deposited. The zeolite catalyst may contain other optional tetravalent and trivalent elements in the zeolite framework. The zeolite structure may be MFI, FAU, TON, MFL, VPI, MEL, AEL, AFI, MWW or MOR. The catalyst is synthesized by preparing a zeolite containing aluminum, silicon and, optionally, other elements, such as germanium, in the framework, depositing a noble metal, such as platinum, on the zeolite and calcining the zeolite. The catalyst may be used for aromatization of alkanes to aromatics. One embodiment is a MFI zeolite catalyst which may be used for the aromatization of alkanes having two to six carbon atoms per molecule to aromatics, such as benzene, toluene and xylenes.Type: ApplicationFiled: January 22, 2007Publication date: July 24, 2008Inventors: Gopalakrishnan G. Juttu, Robert Scott Smith
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Patent number: 7067708Abstract: The present invention relates to a process for the preparation of para-xylene from trimethylpentane.Type: GrantFiled: June 3, 2003Date of Patent: June 27, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Leo E. Manzer, Kostantinos Kourtakis, Norman Herron, Eugene M. McCarron, Paul D. VerNooy
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Patent number: 7019184Abstract: The present invention provides a process for natural gas in the form, e.g., of stranded gas or associated gas to transportable liquids. More particularly, the present invention provides a process in which the gas is non-oxidatively converted to aromatic liquid, preferably in proximity to the welihead, which may be onshore or offshore. In one aspect, the present invention provides integration of separation of wellhead fluids into associated gas and crude with blending of the aromatic liquid derived from the gas with the crude. Alternatively, or in combination, in another aspect, the present invention provides integration of conversion of byproduct hydrogen to power with non-oxidative conversion of gas to aromatic liquid.Type: GrantFiled: May 6, 2002Date of Patent: March 28, 2006Assignee: Conocophillips CompanyInventors: Joe D. Allison, Neil Meldrum, Doug S. Jack, Marc J. Ledoux
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Patent number: 6797850Abstract: A chromium catalyst is disclosed for use in dehydrogenation and dehydrocyclization processes.Type: GrantFiled: August 23, 2002Date of Patent: September 28, 2004Assignee: Invista North America S.a.r.l.Inventors: Kostantinos Kourtakis, Leo E. Manzer
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Publication number: 20040015026Abstract: The present invention relates to a process for the preparation of para-xylene from trimethylpentane.Type: ApplicationFiled: June 3, 2003Publication date: January 22, 2004Inventors: Leo E. Manzer, Kostantinos Kourtakis, Norman Herron, Eugene M. McCarron, Paul D. VerNooy
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Publication number: 20030166983Abstract: A catalyst composition and a process for converting a hydrocarbon stream such as, for example, gasoline to C6 to C8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises an alumina, a silica, and a metal wherein the weight ratio of aluminum to silicon is in the range of from about 0.002:1 to about 0.6:1. The process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a hydrocarbon to a C6 to C8 aromatic hydrocarbon. Also disclosed is a process for producing the catalyst composition which comprises: (1) contacting a zeolite with an effective amount of an acid under a condition sufficient to effect a reduction in aluminum content of the zeolite to produce an acid-leached zeolite; and (2) impregnating the acid-leached zeolite with an effective amount of a metal compound under a condition sufficient to effect the production of a metal-promoted zeolite.Type: ApplicationFiled: November 25, 2002Publication date: September 4, 2003Inventors: An-Hsiang Wu, Charles A. Drake, Ralph J. Melton
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Patent number: 6600081Abstract: The present invention relates to a process for the preparation of para-xylene from trimethylpentane.Type: GrantFiled: March 15, 2001Date of Patent: July 29, 2003Inventors: Leo E. Manzer, Kostantinos Kourtakis, Norman Herron, Eugene M. McCarron, Paul D. Ver Nooy
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Patent number: 6552243Abstract: A molybdenum-loaded crystalline aluminosilicate molecular sieve that exhibits the MFI crystal structure and has a silica-to-alumina ratio of about 50:1 is useful for aromatizing a hydrocarbon feed stream. The crystalline aluminosilicate preferably has an external surface acidity selectively passivated by means of an amorphous silica layer. A process for the aromatization of methane comprises a one- or multi-step process that contacts a feed stream comprising at least methane with a catalyst composition comprising the preferred molecular sieve, at hydrocarbon conversion conditions that include a temperature of 600-800° C., a pressure of less than 5 atmospheres absolute and a Weight Hourly Space Velocity (WHSV) of 0.1-10 h−1, with the external surface acidity of the crystalline aluminosilicate preferably selectively passivated by an amorphous silica layer. C6-plus aromatic hydrocarbons are preferably recovered from the process by means of an intermediate separation step.Type: GrantFiled: July 27, 2001Date of Patent: April 22, 2003Assignee: Conoco Phillips CompanyInventors: Joe D. Allison, Stephan Basso, Marc LeDoux, Cuong Pham-Huu, Harold A. Wright
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Patent number: 6514896Abstract: A process for making an improved zeolite catalyst composition comprising acid-treating a zeolite to provide an acid-treated zeolite, ion-exchanging the ions of such acid-treated zeolite with ions of zinc and at least one other metal in the presence of an ion-exchange medium, and then treating such acid-treated, ion-exchanged zeolite in a steam atmosphere. An improved zeolite catalyst composition made by such process is also disclosed. Processes are also disclosed for using the improved zeolite catalyst composition, made by the novel process, in the conversion of hydrocarbons, preferably non-aromatic hydrocarbons, to lower olefins (such as ethylene and propylene) and aromatic hydrocarbons (such as benzene, toluene, and xylene).Type: GrantFiled: January 6, 2000Date of Patent: February 4, 2003Assignee: Phillips Petroleum CompanyInventors: Charles A. Drake, An-hsiang Wu
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Publication number: 20020007100Abstract: The present invention relates to a process for the preparation of para-xylene from trimethylpentane.Type: ApplicationFiled: March 15, 2001Publication date: January 17, 2002Inventors: Leo E. Manzer, Norman Herron, Kostantinos Kourtakis, Eugene M. McCarron, Paul D. Ver nooy
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Patent number: 6300376Abstract: Indane dimer compounds and their pharmaceutical use particularly to achieve smooth muscle relaxing activity and/or mast cell stabilizing activity and/or anti-inflammatory activity are described.Type: GrantFiled: June 8, 1998Date of Patent: October 9, 2001Assignee: Venantius LimitedInventors: John Walsh, Neil Frankish, Helen Sheridan, Ronan Farrell, William Byrne
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Publication number: 20010014645Abstract: There is provided a catalyst exhibiting a high activity and less catalytic deterioration, as well as a high selectivity, suitable for use in allowing aromatic hydrocarbons of 9 or more carbon atoms to react, and thereby converting them into toluene and aromatic hydrocarbons of 8 carbon atoms more useful as gasoline bases, and a conversion method using the catalyst. The catalyst is used for converting aromatic hydrocarbons of 9 or more carbon atoms in a material oil containing a component with a boiling point exceeding 210° C. into toluene and aromatic hydrocarbons of 8 carbon atoms in the presence of hydrogen, and contains a carrier containing one or more than one zeolites in which the maximum pore diameter of micropores is in a range of 0.6 to 1.0 nm; and one or more than one metals selected from the Group VIA metals of the Periodic Table or compounds thereof.Type: ApplicationFiled: March 1, 2001Publication date: August 16, 2001Inventors: Katuhiko Ishikawa, Eiji Yasui, Fumio Haga, Toshio Waku, Toshiyuki Enomoto
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Publication number: 20010008949Abstract: A catalyst composition, a process for producing the composition and a hydrocarbon conversion process for converting a saturated hydrocarbon to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises a zeolite having incorporated therein a promoter comprising carbon and a metal or metal oxide. The composition can be produced by incorporating a metal compound into the zeolite followed by thermal treatment of the resulting zeolite with a hydrocarbon. The hydrocarbon conversion process comprises contacting a fluid which comprises a saturated hydrocarbon with the catalyst composition under a condition sufficient to effect the conversion of a saturated hydrocarbon to a C6 to C8 aromatic hydrocarbon.Type: ApplicationFiled: September 30, 1997Publication date: July 19, 2001Applicant: PHILLIPS PETROLEUM COMPANYInventors: AN-HSIANG WU, CHARLES A. DRAKE
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Patent number: 6132695Abstract: A process of preparing a Group IV, V, or VI metal carbonitride including reacting a Group IV, V, or VI metal amide complex with ammonia to obtain an intermediate product; and, heating the intermediate product to temperatures and for times sufficient to form a Group IV, V, or VI metal carbonitride is provided together with the product of the process and a process of reforming an n-alkane by use of the product.Type: GrantFiled: May 29, 1998Date of Patent: October 17, 2000Assignee: The Regents of the University of CaliforniaInventors: Joseph Barrera, David C. Smith
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Patent number: 6124515Abstract: A catalyst composition, a process for producing the catalyst composition, and a hydroconversion process for converting a fluid stream comprising at least one saturated hydrocarbon to C.sub.6 to C.sub.8 aromatic hydrocarbons such as benzene, toluene, and xylenes are disclosed. The catalyst composition comprises a zeolite and a promoter. The process for producing the composition comprises the steps of: (1) combining a zeolite with a complexing ligand and a promoter compound under a condition sufficient to produce a modified zeolite; and (2) heating the modified zeolite to produce a promoted zeolite. The hydroconversion process comprises contacting a fluid stream with the catalyst composition under a condition sufficient to effect the conversion of a saturated hydrocarbon to a C.sub.6 to C.sub.8 aromatic hydrocarbon.Type: GrantFiled: September 23, 1999Date of Patent: September 26, 2000Assignee: Phillips Petroleum CompanyInventors: An-hsiang Wu, Charles A. Drake
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Patent number: 6063975Abstract: A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C.sub.6 to C.sub.8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises a zeolite, a clay, and a promoter. The process for producing the composition comprises the steps: (1) combining a zeolite with a clay and a promoter under a condition sufficient to bind the clay to the zeolite to produce a clay-bound zeolite; and (2) heating the clay-bound zeolite to produce a modified zeolite. The hydrotreating process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a hydrocarbon to an olefin and a C.sub.6 to C.sub.8 aromatic hydrocarbon.Type: GrantFiled: October 14, 1998Date of Patent: May 16, 2000Assignee: Phillips Petroleum CompanyInventors: Charles A. Drake, An-hsiang Wu
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Patent number: 6045689Abstract: A process for converting hydrocarbons into aromatic compounds, which entails contacting a composition containing hydrocarbons with a catalyst under temperature and pressure conditions to produce the aromatic compounds, the catalyst containing a matrix of .eta. transition alumina and/or .gamma. transition alumina. The catalyst contains 0.001 to 2 wt % of silicon, 0.1 to 15 wt % of at least one platinum group metal, and 0.005 to 10 wt % of at least one promoter metal. The promoter metals may be tin, germanium, indium, gallium, thallium, antimony, lead, rhenium, manganese, chromium, molybdenium or tungsten. The catalyst may also contain a doping metal.Type: GrantFiled: December 15, 1997Date of Patent: April 4, 2000Assignee: Institut Francais du PetroleInventors: Fabio Alario, Jean-Marie Deves, Patrick Euzen
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Patent number: 6028027Abstract: Catalysts comprising iron and potassium and, if desired, further elements, which catalysts are suitable for dehydrogenating hydrocarbons to give the corresponding olefinically unsaturated hydrocarbons, are prepared by calcining a finely divided dry or aqueous mixture of an iron compound with a potassium compound and, if desired, compounds of further elements in a first step that agglomerates having a diameter of from 5 to 50 .mu.m and formed from smaller individual particles are obtained and, in a second step, preferably after shaping, calcining it at from 300 to 1000.degree. C., with the maximum calcination temperature in the second step preferably being at least 30.degree. below the calcination temperature in the first step. The catalysts thus prepared are useful, in particular, for dehydrogenating ethylbenzene to give styrene.Type: GrantFiled: March 17, 1998Date of Patent: February 22, 2000Assignee: BASF AktiengesellschaftInventors: Michael Baier, Christopher William Rieker, Otto Hofstadt, Wolfgang Buchele, Wolfgang Jurgen Popel, Hermann Petersen, Norbert Neth
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Patent number: 6007700Abstract: Gasolines are reformed and parafin and naphthene hydrocarbons are converted to aromatic compounds by contacting the hydrocarbons with a catalyst comprising a matrix of .eta. transition alumina and .gamma. transition alumina. The catalyst contains at least one doping metal, at least one halogen, at least one noble metal and at least one promoter metal. The doping metals are selected from titanium, zirconium, hafnium, cobalt, nickel, zinc, and the lanthanides and the promoter metals are selected from tin, germanium, indium, gallium, thallium, antimony, lead, rhenium, manganese, chromium, molybdenum and tungsten.Type: GrantFiled: December 15, 1997Date of Patent: December 28, 1999Assignee: Institut Francais Du PetroleInventors: Fabio Alario, Jean-Marie Deves, Patrick Euzen
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Patent number: 5998686Abstract: A dehydrocyclo-oligomerization process is provided for converting aliphatic hydrocarbons to aromatics by contacting the feedstock under conversion conditions which a zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst comprises first zeolite crystals which are bound together by second zeolite crystals. If the zeolite bound zeolite catalyst is selectivated, the process can produce greater than equilibrium amounts of paraxylene.Type: GrantFiled: May 29, 1997Date of Patent: December 7, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Kenneth R. Clem, Gary D. Mohr, Robert Scott Smith
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Patent number: 5968345Abstract: A process for the conversion of a hydrocarbon load containing paraffin, naphthene and aromatic hydrocarbons having 5 to 12 carbon atoms into aromatic compounds, which entails contacting the load with a catalyst under temperature and pressure conditions to produce the aromatic compounds, the catalyst containing:a matrix consisting of 0 to 100% by weight of .eta. transition alumina, the remaining weight percentage of the matrix, up to 100%, consisting of .gamma. transition alumina, andat least one doping metal selected from the group consisting of alkali metals and alkaline-earth metals,at least one halogen selected from the group consisting of fluorine, chlorine, bromine and iodine,at least one noble metal selected from the platinum group, andat least one promoter metal selected from the group consisting of tin, germanium, indium, gallium, thallium, antimony, lead, rhenium, manganese chromium, molybdenum and tungsten,the catalyst having previously been hydrothermally treated at a temperature of 300 to 1,000.Type: GrantFiled: December 15, 1997Date of Patent: October 19, 1999Assignee: Institut Francais du PetroleInventors: Fabio Alario, Jean-Marie Deves, Patrick Euzen
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Patent number: 5952534Abstract: The invention is related to a process for making 2,6-dimethylnaphthalene from p-xylene and 1- or 2-butene or butadiene via 1-(p-tolyl)-2-methylbutane or 1-(p-tolyl)-2-methylbutane. 2,6-dimethylnaphthalene can be used for making polyethylenenaphthalate.Type: GrantFiled: March 20, 1998Date of Patent: September 14, 1999Assignee: Optatech OyInventors: Kari Vahteristo, Erkki Halme, Salme Koskimies, Sigmund M. Csicsery, Markku Laatikainen, Vesa Niemi
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Patent number: 5936135Abstract: The present invention describes a process for the conversion of a lower alkane or a mixture of lower alkanes or a feed containing lower alkane(s) to aromatics or higher hydrocarbons, which comprises (i) treating a bifunctional pentasil zeolite catalyst, optionally containing one or more transition elements, having strong dehydrogenation and acid sites with a mixture of H.sub.2, steam and optionally the presence of an inert gas at a gas hourly space velocity of at least about 500 cm.sup.3 g.sup.-1 h.sup.-1 at a temperature in the range of 400.degree.-800.degree. C. and pressure in the range of 1-5 atm. for a period of at least 0.5 h; (ii) treating the catalyst obtained in step (i) with air or O.sub.2 at a gas hourly space velocity of at least about 200 cm.sup.3 g.sup.-1 h.sup.-1) at a temperature in the range of 400-800.degree. C. and pressure in the range of 1-5 atm for a period of at least 0.Type: GrantFiled: August 26, 1997Date of Patent: August 10, 1999Assignee: Council of Scientific & Industrial ResearchInventors: Vasant R. Choudhary, Anil K. Kinage, Tushar V. Choudhary
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Patent number: 5641393Abstract: A crystalline zeolite high-silica SSZ-37 is prepared using a N,N-dimethyl-4-azoniatricyclo [5.2.2.0.sup.(2,6) ] undec-8-ene cation as a template wherein said zeolite is used in hydrocarbon conversion processes.Type: GrantFiled: August 8, 1995Date of Patent: June 24, 1997Assignee: Chevron U.S.A. Inc.Inventor: Yumi Nakagawa