Plural Stage Treatments With Hydrogen Patents (Class 208/210)
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Patent number: 7297251Abstract: A process for the selective hydrodesulfurization of naphtha streams containing a substantial amount of olefins and organically bound sulfur. The naphtha stream is selectively hydrodesulfurized by passing it through a first reaction zone containing a bed of a first hydrodesulfurization catalyst, then passing the resulting product stream through a second reaction zone containing a bed of a second hydrodesulfurization catalyst, which second hydrodesulfurization catalyst contains a lower level of catalytic metals than the first hydrodesulfurization catalyst.Type: GrantFiled: April 28, 2003Date of Patent: November 20, 2007Assignee: Exxonmobil Research and Engineering CompanyInventors: Edward S. Ellis, Richard A. Demmin, John P. Greeley, Gary B. McVicker, Bruce R. Cook, Garland B. Brignac, Thomas R. Halbert
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Patent number: 7291257Abstract: A process where the need to circulate hydrogen through the catalyst is eliminated is provided. This is accomplished by mixing and/or flashing the hydrogen and the oil to be treated in the presence of a solvent or diluent in which the hydrogen solubility is “high” relative to the feed. The type and amount of diluent added, as well as the reactor conditions, can be set so that all of the hydrogen required in the hydroprocessing reactions may be available in solution. The oil/diluent/hydrogen solution can then be fed to a plug flow reactor packed with catalyst where the oil and hydrogen react. No additional hydrogen is required, therefore, hydrogen recirculation is avoided and trickle bed operation of the reactors is avoided. Therefore, the large trickle bed reactors can be replaced by much smaller tubular reactor.Type: GrantFiled: December 9, 2004Date of Patent: November 6, 2007Assignee: Process Dynamics, Inc.Inventors: Michael D. Ackerson, Michael Steven Byars
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Patent number: 7276150Abstract: The process for desulfurizing a gas oil fraction according to the invention comprises a low-boiling gas oil fraction hydrodesulfurization step (I) wherein a low-boiling gas oil fraction is desulsurized under the condition of a H2/Oil ratio of 70 to 200 Nm3/kl to obtain a treated oil, a high-boiling gas oil fraction hydrodesulfurization step (II) wherein a high-boiling gas oil fraction is desulsurized under the condition of a H2Oil ratio of 200 to 800 Nm3/kl to obtain a treated oil, and a step (III) wherein the treated oil obtained in the step (I) is mixed with the treated oil obtained in the step (II), and in this process, at least a part of a gas containing unreacted hydrogen in the step (II) is used for the hydrodesulfurization of the step (I).Type: GrantFiled: November 16, 2001Date of Patent: October 2, 2007Assignee: JGC CorporationInventors: Shigeki Nagamatsu, Jun Abe, Akira Sugimoto, Makoto Inomata, Tetsuya Watanabe
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Patent number: 7276151Abstract: Feed oil is subject to atmospheric distillation, to thereby be separated into light oil or light distillate and atmospheric residue oil. The light distillate is catalytically contacted with pressurized hydrogen in the presence of a catalyst, resulting in a first hydrotreating step being executed. In this instance, various fractions of the light distillate produced in the atmospheric distillation are subject to hydrotreating in a lump. The atmospheric residue oil is then separated into a light matter and a heavy matter. The light matter is subject to second hydrotreating in the presence of a catalyst to produce refined oil (light matter), which is mixed with refined oil produced in the first hydrotreating to prepare a mixture. The mixture is used as gas turbine fuel oil.Type: GrantFiled: September 10, 1999Date of Patent: October 2, 2007Assignee: JGC CorporationInventors: Tsuyoshi Okada, Yoshinori Mashiko, Shinichi Tokuda, Tomoyoshi Sasaki, Kozo Imura, Makoto Inomata, Toshio Tanuma
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Patent number: 7261809Abstract: A process for removing organic sulfur compounds from heavy boiling range naphtha in a dual purpose reactor wherein the heavy boiling range naphtha is fed downflow over a fixed bed of hydrodesulfurization zone and then treated with hydrogen in a hydrodesulfurization catalytic distillation zone. Vapor containing hydrogen sulfide is removed between the zones. Preferably the heavy boiling range naphtha is produced by treating a full boiling range naphtha to concurrently react diolefins and mercaptans and split the light and heavy boiling range naphtha in a distillation column reactor.Type: GrantFiled: November 15, 2002Date of Patent: August 28, 2007Assignee: Catalytic Distillation TechnologiesInventor: Amarjit S. Bakshi
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Patent number: 7250142Abstract: Device for mixing and distributing a dense, generally liquid, fluid and a light, generally gaseous, fluid, placed in a reaction chamber upstream from a granular bed (70) or between two successive granular beds, the said device being characterized by a tubular system (50) for the introduction of dense fluid from outside the reactor, up to a level lower than the level of establishment of the interface between the dense fluid and the light fluid, situated above the plate and preferably more or less next to that of the plate (62). Application of this device to any type of gas/liquid reaction in a fixed bed in particular for hydrotreatment.Type: GrantFiled: July 16, 2003Date of Patent: July 31, 2007Assignee: Institut Francois du PetroleInventors: Christophe Boyer, Vincent Coupard
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Patent number: 7250107Abstract: For producing basic oils and in particular very high quality oils, i.e. oils possessing a high viscosity index (VI), a low aromatics content, good UV stability and a low pour point, from oil cuts having an initial boiling point higher than 340° C., possibly with simultaneous production of middle distillates (in particular gasoils and kerosene) of very high quality, i.e. having a low aromatics content and a low pour point, the invention provides a flexible procedure for producing oils and middle distillates from a charge containing heteroatoms, i.e. containing more than 200 ppm by weight of nitrogen, and more than 500 ppm by weight of sulphur. The procedure comprises at least one hydrorefining stage, at least one stage of catalytic dewaxing on zeolite, and at least one hydrofinishing stage.Type: GrantFiled: July 23, 2001Date of Patent: July 31, 2007Assignee: Institut Francais du PetroleInventors: Eric Benazzi, Christophe Gueret, Pierre Marion, Alain Billon
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Patent number: 7247235Abstract: A process for the hydrogenation of a hydrocarbon feed includes contacting a major amount of the hydrocarbon feed with hydrogen in a counter-current manner in a first reaction zone under hydrogenation reaction conditions in the presence of a hydrogenation catalyst in at least a first catalyst bed wherein a liquid effluent exits at a bottom end of the first reaction zone and a hydrogen-containing gaseous effluent exits at a top end of the first reaction zone, and contacting a minor portion of the hydrocarbon feed with said hydrogen-containing gaseous effluent in a co-current manner in a second reaction zone having a catalyst bed positioned to receive the hydrogen-containing effluent of the first reaction zone.Type: GrantFiled: May 30, 2003Date of Patent: July 24, 2007Assignee: ABB Lummus Global Inc,Inventors: Harjeet Virdi, Arup Roy, Thu-Huong Nguyen
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Patent number: 7238273Abstract: The instant invention is directed to a process for upgrading heavy oils using a slurry composition. The slurry composition is prepared by a series of steps, involving mixing a Group VIB metal oxide and aqueous ammonia to form an aqueous mixture, and sulfiding the mixture to form a slurry. The slurry is then promoted with a Group VIII metal. Subsequent steps involve mixing the slurry with a hydrocarbon oil and combining the resulting mixture with hydrogen gas and a second hydrocarbon oil having a lower viscosity than the first oil. An active catalyst composition is thereby formed.Type: GrantFiled: September 10, 2004Date of Patent: July 3, 2007Assignee: Chevron U.S.A. IncInventors: Kaidong Chen, Pak C. Leung, Bruce E. Reynolds
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Patent number: 7229548Abstract: A method for upgrading a naphtha feed to a naphtha product containing less than about 10 wppm of nitrogen and less than about 15 wppm sulfur, the method comprising contacting said naphtha feed with hydrogen in the presence of a bulk multimetallic catalyst under effective reactor conditions to hydrodesulfurize and hydrodenitrogenize said naphtha feed to produce said naphtha product, wherein said bulk multimetallic catalyst comprises at least one Group VIII non-noble metal and at least two Group VIB metals.Type: GrantFiled: October 2, 2003Date of Patent: June 12, 2007Assignee: ExxonMobil Research and Engineering CompanyInventors: Kenneth L. Riley, Stuart L. Soled, Sabato Miseo, Frans L. Plantenga, Marinus Bruce Cerfontain, Sonja Eijsbouts, Eelko Brevoord
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Patent number: 7182922Abstract: For mixing and distributing a gas phase and a liquid phase over a granular bed, employing an annular peripheral zone inside a reactor via which liquid is introduced and which acts as a buffer zone against fluctuations in the flow of the liquid phase. The device is applicable to catalytic bed chemical reactors especially for the hydrotreatment of hydrocarbons.Type: GrantFiled: April 2, 2004Date of Patent: February 27, 2007Assignee: Institut Francais du PetroleInventors: Christophe Boyer, Vincent Coupard
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Patent number: 7166209Abstract: A process for hydroprocessing a hydrocarbon feedstock includes the steps of providing a hydrocarbon feed having an initial characteristic; providing a first hydrogen-containing gas; feeding the hydrocarbon feed and the first hydrogen-containing gas cocurrently to a first hydroprocessing zone so as to provide a first hydrocarbon product; providing a plurality of additional hydroprocessing zones including a final zone and an upstream zone; feeding the first hydrocarbon product cocurrently with a recycled gas to the upstream zone so as to provide an intermediate hydrocarbon product; and feeding the intermediate hydrocarbon product cocurrently with a second hydrogen-containing gas to the final zone so as to provide a final hydrocarbon product having a final characteristic which is improved as compared to the initial characteristic.Type: GrantFiled: November 21, 2003Date of Patent: January 23, 2007Assignee: Intevep, S.A.Inventor: Carlos Gustavo Dassori
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Patent number: 7141640Abstract: An upflow reactor for the production of bisphenol A from acetone and phenol includes a vessel, a catalyst bed disposed within the vessel, and a reactant distribution/product collection system disposed within the vessel. The reactant distribution/product collection system includes a perforated distributor disposed at a lower end of the reactor. The reactant distribution/product collection system further includes a perforated collector disposed at an upper end of the reactor. A method for producing bisphenol A from acetone and phenol Includes Introducing the reacting mixture containing acetone and phenol to the distributor, directing it upward through the catalyst bed, and recovering the reacted acetone and phenol as bisphenol A together with other isomers and non reacted species. A method for avoiding catalyst bead carryover from the bed in an upflow reactor Includes receiving a product of the upflow reactor into the collector disposed at an upper end of the reactor through a screen with proper slit size.Type: GrantFiled: October 8, 2002Date of Patent: November 28, 2006Assignee: General Electric CompanyInventors: Hatem Belfadhel, Corinne Duchanoy, Jan-Willem Goedmakers, Eduard Hendricus Schlarmann, Monique I. R. de Winne
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Patent number: 7122114Abstract: A process for reducing sulfur compounds in naphtha to produce gasoline of ultra-low sulfur content, i.e., 10–30 ppm of sulfur, from a fluidized catalytic cracking reactor effluent stream, withdraws a high sulfur content sidestream of catalytically produced medium and heavy cat naphtha with an endpoint of +430° F. that is fed to a side column where any thiophenic and benzothophenic compounds are catalytically reacted with hydrogen to convert them to hydrogen sulfide. The desulfurized light and mid-cut naphtha is returned to the main fractionation unit and the heavy catalytic naphtha is withdrawn as a product stream from the bottom of the side column.Type: GrantFiled: July 14, 2003Date of Patent: October 17, 2006Inventor: Christopher Dean
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Patent number: 7108779Abstract: A process for the production of low sulfur hydrocarbonaceous products. The hydrocarbon feedstocks are processed in integrated desulfurization zone, hydrocracking and hydrogenation zones to produce ultra low sulfur diesel, low sulfur naphtha products and low sulfur heavy distillate.Type: GrantFiled: September 25, 2003Date of Patent: September 19, 2006Assignee: UOP LLCInventor: Vasant P. Thakkar
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Patent number: 7094332Abstract: A hydrocracking process to produce ultra low sulfur diesel by reacting a first hydrocarbon feedstock in a hydrocracking zone, introducing the hydrocracking zone effluent and a second hydrocarbon feedstock having a majority boiling at a temperature greater than 565° C. (1050° F.) into a first desulfurization zone, passing the first desulfurization zone effluent to a hot, high pressure vapor-liquid separator to recover a vaporous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream, introducing the vaporous hydrocarbonaceous stream and a third hydrocarbonaceous feedstock comprising diesel into a second desulfurization zone, passing the second desulfurization zone effluent to a cold vapor-liquid separator to provide a hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream and passing the first and the second liquid hydrocarbonaceous streams to a fractionation zone to produce ultra low sulfur diesel.Type: GrantFiled: May 6, 2003Date of Patent: August 22, 2006Assignee: UOP LLCInventors: Tom N. Kalnes, Vasant P. Thakkar
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Patent number: 7090767Abstract: A method for processing a gasoline range hydrocarbon stream wherein a single reactor/distillation tower stream is fractionated into a light fraction and a heavy fraction, the light fraction is hydrodesulfurized, the heavy fraction is optionally hydrocracked and then hydrodesulfurized, and the light and heavy fractions are separately recovered.Type: GrantFiled: May 2, 2002Date of Patent: August 15, 2006Assignee: Equistar Chemicals, LPInventors: Mark P. Kaminsky, Kenneth M. Webber
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Patent number: 7090766Abstract: A process wherein all of the unsaturates within a cracked naphtha stream are substantially hydrogenated to alkanes and the olefin depleted stream is then subjected to hydrodesulfurization to achieve the desired sulfur levels without the formation of recombinant mercaptans.Type: GrantFiled: September 30, 2002Date of Patent: August 15, 2006Inventors: Kenneth H. Johnson, Richard L. Moseley
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Patent number: 7074321Abstract: An integrated hydrocarbon conversion process for the production of low sulfur fuels utilizing a hydrocracking zone, a diesel hydrodesulfurization zone, a fluid catalytic cracking zone and a gasoline hydrodesulfurization zone. The hydrocracking zone is used to convert at least a portion of the feedstock into diesel boiling range hydrocarbons which are desulfurized in the first hydrodesulfurization zone. The unconverted feedstock is introduced into a fluid catalytic cracking zone to produce gasoline boiling range hydrocarbons which are desulfurized in a second hydrodesulfurization zone.Type: GrantFiled: November 12, 2002Date of Patent: July 11, 2006Assignee: UOP LLCInventor: Tom N. Kalnes
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Patent number: 7070690Abstract: The invention relates to a process for conversion of hydrocarbons in the presence of at least one catalyst with controlled acidity, characterized in that the level of activity of said catalyst in isomerization of the cyclohexane is less than 0.10 and/or in that the ratio of toluene hydrogenation activity to the cyclohexane isomerization activity is greater than 10.Type: GrantFiled: February 24, 2003Date of Patent: July 4, 2006Assignee: Institut Francais du PetroleInventors: Virginie Harle, Stéphane Kressmann, Isabelle Guibard, Slavik Kasztelan, Frédéric Morel
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Patent number: 7052598Abstract: A process for the production of gasoline with a low sulfur content that comprises at least one selective hydrogenation of diolefins, optionally at least one stage for transformation, preferably to increase their weight, for light sulfur-containing compounds that are present in the gasoline, at least one fractionation of the gasoline that is obtained into at least two fractions: light gasoline and heavy gasoline, then optionally a stage for transformation, preferably for alkylation or adsorption, of sulfur-containing compounds and a desulfurization treatment in a stage of at least a portion of the heavy fraction.Type: GrantFiled: March 12, 2002Date of Patent: May 30, 2006Assignees: Institut Francais du Petrole, BP Corporation North America, Inc.Inventors: Quentin Debuisschert, Denis Uzio, Jean-Luc Nocca, Florent Picard
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Patent number: 7033488Abstract: A defined catalyst withdrawal and replacement program for optimizing the productivity and the economics of catalyst consumption in a multi-reactor system is disclosed. Catalyst cost is reduced by minimizing removal of the newest catalyst and maximizing removal of older catalyst to achieve an overall reduction of catalyst age in the multi-reactor system.Type: GrantFiled: October 4, 2002Date of Patent: April 25, 2006Assignee: ConocoPhillips CompanyInventor: James L. Rockwell
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Patent number: 7001502Abstract: A process is provided for treating crude oil to visbreak and/or upgrade such oil using hydrogen gas. The process includes the steps of introducing hydrogen into a heated stream of crude oil or partially upgraded crude oil and mixing such introduced hydrogen with the oil to achieve intimate dispersion of hydrogen to enhance thereby visbreaking and/or upgrading.Type: GrantFiled: September 29, 1999Date of Patent: February 21, 2006Assignee: Canadian Enviromnental Equipment & Engineering Technologies, Inc.Inventors: Robert Satchwell, Jose Lourenco, Patrick J. Cochrane, Roderick M. Facey, Joao Rodrigues, Kenneth Bannard, Hannu Salokangas
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Patent number: 7001503Abstract: A unit for hydrorefining of hydrocarbon crude oil comprising sulfur-containing compounds comprises first catalyst layer 33 and second catalyst layer 38, top space 34 for separating vapor component and liquid component, bottom space 36, and valve tray 35 that divides top space 34 and bottom space 36. Hydrogen released from hydrogen nozzle 40 placed in the bottom space is passed through liquid component that has accumulated in the valve tray and stripping of liquid components is performed. Hydrogen released from hydrogen nozzle 40 is again introduced, to second catalyst layer 38 as a cocurrent with the stripped liquid component. By stripping, it is possible to reduce the sulfur content, the nitrogen content and reduce the aromatic content of the hydrocarbon crude oil when compared to the conventional method. Since the hydrorefining unit has a simple structure, the unit can be easily made by modifying existing units.Type: GrantFiled: January 14, 2000Date of Patent: February 21, 2006Assignee: Japan Energy CorporationInventors: Hiroki Koyama, Yuichi Takahashi
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Patent number: 6984312Abstract: A process for the treatment of a light cracked naphtha is disclosed wherein the light cracked naphtha is first subjected to thioetherification and fractionation into two boiling fractions. The lower boiling fraction is removed as overheads for later recombination with the product and the higher boiling fraction is combined with a heavy cracked naphtha and subjected to simultaneous hydrodesulfurization and fractionation to separate the higher boiling fraction from the heavy cracked naphtha which is recycled. The recycled heavy cracked naphtha is eventually desulfurized and hydrogenated to produce a clean solvent which washes the catalyst and extends catalyst life.Type: GrantFiled: November 3, 2003Date of Patent: January 10, 2006Assignee: Catalytic Distillation TechnologiesInventors: Manoj Som, Gary G. Podrebarac, Scott W. Shorey
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Patent number: 6972086Abstract: The invention relates to a process for the production of gasoline with a low sulfur content comprising at least three stages: a first stage in which the sulfur-containing compounds present in the gasoline are at least partially transformed into H2S and into saturated sulfur-containing compounds; a second stage whose purpose is to eliminate the H2S from the gasoline produced in the first stage; and a third stage in which the saturated sulfur-containing compounds remaining in the gasoline are transformed into H2S. The process according to the invention optionally also comprises a pretreatment stage whose purpose is to hydrogenate the diolefins of the feedstock before the first stage.Type: GrantFiled: July 3, 2001Date of Patent: December 6, 2005Assignee: Institut Français du PétroleInventors: Blaise Didillon, Denis Uzio, Jean-Luc Nocca, Quentin Debuisschert
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Patent number: 6930219Abstract: A process for treating organic compounds includes providing a composition which includes a substantially mesoporous structure of silica containing at least 97% by volume of pores having a pore size ranging from about 15 ? to about 30 ? and having a micropore volume of at least about 0.01 cc/g, wherein the mesoporous structure has incorporated therewith at least about 0.02% by weight of at least one catalytically and/or chemically active heteroatom selected from the group consisting of Al, Ti, V, Cr, Zn, Fe, Sn, Mo, Ga, Ni, Co, In, Zr, Mn, Cu, Mg, Pd, Pt and W, and the catalyst has an X-ray diffraction pattern with one peak at 0.3° to about 3.5° at 2?. The catalyst is contacted with an organic feed under reaction conditions wherein the treating process is selected from alkylation, acylation, oligomerization, selective oxidation, hydrotreating, isomerization, demetalation, catalytic dewaxing, hydroxylation, hydrogenation, ammoximation, isomerization, dehydrogenation, cracking and adsorption.Type: GrantFiled: December 6, 2002Date of Patent: August 16, 2005Assignee: ABB Lummus Global Inc.Inventors: Zhiping Shan, Jacobus Cornelius Jansen, Chuen Y. Yeh, Philip J. Angevine, Thomas Maschmeyer, Mohamed S. Hamdy
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Patent number: 6929738Abstract: A two stage hydrodesulfurizing process for producing low sulfur distillates. A distillate boiling range feedstock containing in excess of about 3,000 wppm sulfur is hydrodesulfurized in a first hydrodesulfurizing stage containing one or more reaction zones in the presence of hydrogen and a hydrodesulfurizing catalyst. The liquid product stream thereof is passed to a first separation stage wherein a vapor phase product stream and a liquid product stream are produced. The liquid product stream, which has a substantially lower sulfur and nitrogen content then the original feedstream is passed to a second hydrodesulfurizing stage also containing one or more reaction zones where it is reacted in the presence of hydrogen and a second hydrodesulfurizing catalyst at hydrodesulfurizing conditions. The catalyst in any one or more reaction zones is a bulk multimetallic catalyst comprised of at least one Group VIII non-noble metal and at least two Group VIB metals.Type: GrantFiled: January 14, 2000Date of Patent: August 16, 2005Assignee: ExxonMobil Research and Engineering CompanyInventors: Kenneth Llyod Riley, Darryl Patrick Klein, Zhiguo Hou, Stuart Leon Soled, Michael Charles Kerby, Gary Brice McVicker, Edward Stanley Ellis, Michele Sue Touvelle, Sabato Miseo
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Patent number: 6913688Abstract: A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically bound sulfur and olefins. The olefinic naphtha stream is selectively hydrodesulfurized in a first sulfur removal stage and resulting product stream, which contains hydrogen sulfide and organosulfur is fractionated at a temperature to produce a light fraction containing less than about 100 wppm organically bound sulfur and a heavy fraction containing greater than about 100 wppm organically bound sulfur. The light fraction is stripped of at least a portion ofits hydrogen sulfide and can be collected or passed to gasoline blending. The heavy fraction is passed to a second sulfur removal stage wherein at least a portion of any remaining organically bound sulfur is removed.Type: GrantFiled: October 18, 2002Date of Patent: July 5, 2005Assignee: ExxonMobil Research and Engineering CompanyInventors: John C. Coker, Garland B. Brignac, Thomas R. Halbert, John G. Matragrano, Brij Gupta, Robert C. Welch, William E. Winter, Jr.
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Patent number: 6896795Abstract: The invention relates to a process for the production of gasoline with a low sulfur content that comprises at least the following stages: a1) at least a selective hydrogenation of diolefins, a2) optionally at least one stage that is aimed at increasing the molecular weight of the light sulfur-containing products that are present in the gasoline, b) at least one separation of the gasoline that is obtained in stage a1 or a2 into two fractions: light gasoline and heavy gasoline, c) at least one treatment with heavy gasoline that is separated in stage b on a catalyst that makes it possible to decompose or to hydrogenate at least partially the unsaturated sulfur-containing compounds, d) at least one treatment of the heavy gasoline that is obtained in stage c, without eliminating the H2S that is formed during this stage, on a catalyst that makes it possible to decompose the sulfur-containing compounds and more preferably the linear and/or cyclic saturated compounds.Type: GrantFiled: April 1, 2002Date of Patent: May 24, 2005Assignee: Institut Francais du PetroleInventors: Blaise Didillon, Denis Uzio, Nathalie Marchal
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Patent number: 6881324Abstract: A process for the treatment of light naphtha hydrocarbon streams is disclosed wherein the mercaptans contained therein are reacted with diolefins simultaneous with fractionation into a light stream and a heavy stream. The heavy stream is then simultaneously treated at high temperatures and low pressures and fractionated. The naphtha is then stripped of the hydrogen sulfide in a final stripper.Type: GrantFiled: March 6, 2003Date of Patent: April 19, 2005Assignee: Catalytic Distillation TechnologiesInventor: Lawrence A. Smith, Jr.
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Patent number: 6858131Abstract: Feed oil is subject to atmospheric distillation, to thereby be separated into light oil or light distillate and atmospheric residue oil. The light distillate is catalytically contacted with pressurized hydrogen in the presence of a catalyst, resulting in a first hydrotreating step being executed. In this instance, various fractions of the light distillate produced in the atmospheric distillation are subject to hydrotreating in a lump. The atmospheric residue oil is then separated into a light matter and a heavy matter. The light matter is subject to second hydrotreating in the presence of a catalyst to produce refined oil (light matter), which is mixed with refined oil produced in the first hydrotreating to prepare a mixture. The mixture is used as gas turbine fuel oil.Type: GrantFiled: September 10, 1999Date of Patent: February 22, 2005Assignee: JGC CorporationInventors: Tsuyoshi Okada, Yoshinori Mashiko, Shinichi Tokuda, Tomoyoshi Sasaki, Kozo Imura, Makoto Inomata, Toshio Tanuma
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Patent number: 6855246Abstract: A process for hydrotreating gas oil comprises: a first gas oil desulfurization step carried out in a first catalytic zone comprising a desulfurization catalyst; at least partial elimination of the hydrogen sulphide formed at the end of the first gas oil desulfurization step; one or more additional desulfurization steps carried out in one or more catalytic zones comprising a desulfurization catalyst. The distribution of the catalyst in the different zones can be selected so as to maximise the catalytic activity, and thus minimize the volume of catalyst required for a unit of a given capacity operating at fixed operating temperature and pressure, so as to obtain an intensely desulfurized gas oil.Type: GrantFiled: February 12, 2001Date of Patent: February 15, 2005Assignee: Institut Francais du PetroleInventors: Thierry Chapus, Frédéric Morel
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Patent number: 6855853Abstract: A process for the production of low benzene content gasoline is disclosed wherein a full boiling range naphtha is fractionated to produce a light naphtha, a medium naphtha and a heavy naphtha. The benzene is contained in the medium naphtha and this stream is subjected to hydrogenation to convert the benzene to cyclohexane which may be isomerized to improve the octane. The valuable olefins are removed in the light naphtha and the valuable heavier aromatics (toluene and xylenes) are removed in the heavy naphtha. In a preferred embodiment all of the reactions are carried out in distillation column reactors.Type: GrantFiled: January 29, 2003Date of Patent: February 15, 2005Assignee: Catalytic Distillation TechnologiesInventors: Willibrord A. Groten, Kerry L. Rock
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Patent number: 6843906Abstract: An integrated hydrotreating process which produces a high quality feed for the FCC to maintain sulfur in FCC gasoline to a level lower than 30 ppm from a high boiling feedstock and an ultra low sulfur diesel stream preferably less than 10 ppm from a cracked stock diesel boiling material. The high boiling feedstock is firstly hydrotreated to reduce the concentration of heterogeneous compounds which produces lower boiling hydrocarbonaceous compounds boiling in the diesel range. The resulting hydrocarbonaceous compounds boiling in the diesel range together with other cracked material in the diesel boiling range are further hydrotreated in a second hydrotreating zone to meet ultra low sulfur diesel specifications and high cetane index.Type: GrantFiled: May 17, 2002Date of Patent: January 18, 2005Assignee: UOP LLCInventor: Odette T. Eng
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Patent number: 6841062Abstract: This invention relates to a crude oil desulfurization process which comprises hydrodesulfurizing a crude oil feed in a crude desulfurization unit. The desulfurized crude oil is then separated into a light gas oil fraction, a vacuum gas oil fraction and a vacuum residuum fraction. The vacuum gas oil is hydrocracked to form at least one low sulfur fuel product. The light gas oil fraction is hydrotreated. The vacuum gas oil may be hydrocracked in one or more stages. Hydrocracking in the second stage, if present, will convert of at least 20% of the first zone effluent, to create a low sulfur light gas oil fraction. The light gas oil fraction may then be hydrotreated.Type: GrantFiled: June 28, 2001Date of Patent: January 11, 2005Assignee: Chevron U.S.A. Inc.Inventor: Bruce E. Reynolds
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Patent number: 6835301Abstract: A process for hydroprocessing a hydrotreated liquid distillate stream to produce a stream exceptionally low in sulfur as well as aromatics. A hydrotreated distillate stream is further hydrotreated in a co-current reaction zone wherein the reaction product is passed to a separation drum wherein a vapor product is collected overhead and a liquid product is passed to a aromatics saturation zone countercurrent to the flow of hydrogen treat gas.Type: GrantFiled: December 7, 1999Date of Patent: December 28, 2004Assignee: Exxon Research and Engineering CompanyInventors: Edward S. Ellis, Henry Jung, William E. Lewis
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Publication number: 20040256293Abstract: The present invention pertains to a method for hydroprocessing a heavy hydrocarbon oil, comprising bringing a heavy hydrocarbon oil in a first stage into contact with hydroprocessing catalyst I in the presence of hydrogen, after which the effluent of the first stage is contacted in whole or in part with hydroprocessing catalyst II in the presence of hydrogen. The method of the invention combines efficient contaminant removal with high residue conversion and low sediment formation. The invention also comprises a combination of catalysts for use in the above method.Type: ApplicationFiled: August 18, 2004Publication date: December 23, 2004Inventors: Satoshi Abe, Katsuhisa Fujita
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Publication number: 20040251169Abstract: Process for the removal of coloured compounds in a hydrocarbon feedstock comprising the steps of hydrotreating the feedstock in presence of a first hydrotreating catalyst under conditions being effective in hydrogenation of hydrogenable compounds being present in the feedstock and hydrotreating an effluent from the first hydrotreating step in a second catalytic hydrotreating step being carried out in a second hydrotreating reactor at hydrotreating conditions, wherein the effluent from the first hydrotreating step is separated into a gas phase and a mixed gas and liquid phase prior to the second hydrotreating step, and the mixed phase is hydrotreated in the second hydrotreating step without further addition of hydrogen.Type: ApplicationFiled: June 8, 2004Publication date: December 16, 2004Inventors: Rasmus Breivik, Johan Mogensen, Kim Gron Knudsen, Johannes Wrisberg, Bent Sarup
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Patent number: 6830678Abstract: The invention relates to a process of producing gasoline with a low sulphur content from a feedstock containing sulphur. This process comprises at least one step a1 of selectively hydrogenating the diolefins and acetylenic compounds, at least one separation of the gasoline (step b) obtained at step a1 into at least three fractions, at least one step c1 of treating the heavy gasoline separated at step b on a catalyst enabling the unsaturated sulphur compounds to be at least partially decomposed or hydrogenated and at least one step d to remove the sulphur and nitrogen from at least one intermediate fraction, followed by catalytic reforming.Type: GrantFiled: March 29, 2001Date of Patent: December 14, 2004Assignee: Institut Francais DuPetroleInventors: Blaise Didillon, Denis Uzio, Quentin Debuisschert, Jean-Luc Nocca
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Publication number: 20040248726Abstract: The present invention relates to a catalytic composition which comprises a beta zeolite, a metal of group VIII, a metal of group VI B and optionally one or more oxides as carrier. The catalytic system of the present invention can be used for the hydrotreating of hydrocarbon mixtures and more specifically in the upgrading of hydrocarbon mixtures having boiling ranges within the range of 35° to 250° C., containing sulfur impurities, i.e. in hydrodesulfuration with contemporaneous skeleton isomerization and a reduced hydrogenation degree of olefins contained in said hydrocarbon mixtures, the whole process being carried out in a single step.Type: ApplicationFiled: July 15, 2004Publication date: December 9, 2004Applicants: AGIP PETROLI S.p.A., ENITECNOLOGIE S.p.A.Inventors: Laura Zanibelli, Marco Ferrari, Virginio Arrigoni
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Publication number: 20040238409Abstract: A process for the hydrogenation of a hydrocarbon feed includes contacting a major amount of the hydrocarbon feed with hydrogen in a counter-current manner in a first reaction zone under hydrogenation reaction conditions in the presence of a hydrogenation catalyst in at least a first catalyst bed wherein a liquid effluent exits at a bottom end of the first reaction zone and a hydrogen-containing gaseous effluent exits at a top end of the first reaction zone, and contacting a minor portion of the hydrocarbon feed with said hydrogen-containing gaseous effluent in a co-current manner in a second reaction zone having a catalyst bed positioned to receive the hydrogen-containing effluent of the first reaction zone.Type: ApplicationFiled: May 30, 2003Publication date: December 2, 2004Inventors: Harjeet Virdi, Arup Roy, Thu-Huong Nguyen
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Patent number: 6824673Abstract: A process for producing distillate boiling range streams that are low in both sulfur and aromatics. A distillate feedstock is treated in a first hydrodesulfurization stage in the presence of a hydrogen-containing treat gas and a hydrodesulfurization catalyst, thereby resulting in partial desufurization of the stream. The partially desulfurized distillate stream is then treated in a second hydrodesulfurization stage, also in the presence of a hydrogen-containing treat gas and a hydrodesulfurization catalyst. The hydrogen-containing treat gas is cascaded from the next downstream reaction stage, which is an aromatics hydrogenation stage.Type: GrantFiled: April 20, 2000Date of Patent: November 30, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Edward S. Ellis, Henry Jung, William E. Lewis, Larry L. Iaccino, Michele S. Touvelle, Gordon F. Stuntz
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Patent number: 6824676Abstract: A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and a heavy boiling range naphtha. The intermediate boiling range naphtha containing thiophene and thiophene boiling range mercaptans is passed on to a polishing hydrodesulfurization reactor where a low sulfur, low olefin gas oil is concurrently fed to the polishing reactor to insure that a liquid phase is present.Type: GrantFiled: March 8, 2002Date of Patent: November 30, 2004Assignee: Catalytic Distillation TechnologiesInventors: Gary G. Podrebarac, Willibrord A. Groten, Lawrence A. Smith, Jr.
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Patent number: 6821412Abstract: A catalyst for hydrotreatment of gas oil containing defined amounts of platinum, palladium, and in a support of an inorganic oxide containing a crystalline alumina having a crystallite diameter of from 20 to 40 Å. A method for hydrotreating gas oil containing an aromatic compound in the presence of the above catalyst at defined conditions. A method for catalytically hydrotreating gas oil (b.p. 160-400° C.) or blend oil, in a first desulfurization step at defined conditions using a catalyst with at least one Group 6a and Group 8 metal in a support of an inorganic oxide to regulate to a defined sulfur-containing compound content, and then carrying a second desulfurization step by catalytic reaction of the oil at defined conditions using a catalyst of platinum, palladium, and halogen with a support containing an alumina.Type: GrantFiled: February 28, 2002Date of Patent: November 23, 2004Assignee: Cosmo Oil Co., Ltd.Inventors: Takashi Fujukawa, Hiroshi Kimura, Hirofumi Mizuguchi, Hideki Godo
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Publication number: 20040209771Abstract: The present invention pertains to a method for hydroprocessing a heavy hydrocarbon oil, comprising bringing a heavy hydrocarbon oil into contact with hydroprocessing catalyst I in the presence of hydrogen in a first stage, after which the effluent of the first stage is contacted in whole or in part with hydroprocessing catalyst II in the presence of hydrogen in a second stage. The method according to the invention combines efficient contaminant removal with high cracking rate and low sediment formation. The invention also pertains to the combination of catalysts.Type: ApplicationFiled: May 21, 2004Publication date: October 21, 2004Inventors: Satoshi Abe, Katsuhisa Fujita
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Publication number: 20040195151Abstract: A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and a heavy boiling range naphtha. The intermediate boiling range naphtha containing thiophene and thiophene boiling range mercaptans is passed on to a polishing hydrodesulfurization reactor where a low sulfur, low olefin gas oil is concurrently fed to the polishing reactor to insure that a liquid phase is present.Type: ApplicationFiled: April 7, 2004Publication date: October 7, 2004Inventors: Gary G. Podrebarac, Willibrord A. Groten, Lawrence A. Smith
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Publication number: 20040188328Abstract: First (210) and second (240) feedstocks are hydrotreated in an integrated hydrogenation plant (200) using a hot separator (230) that provides a vapor stream containing at least some of the hydrotreated first feedstock (210), wherein the second feedstock (240) is mixed with the vapor stream at a position downstream of the separator (240) and upstream of the a second hydrotreating (250) reactor to form a mixed second feedstock that is fed into the second hydrotreating reactor (250) to produce a ultra-low sulfur product.Type: ApplicationFiled: May 3, 2004Publication date: September 30, 2004Inventor: James Turner
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Publication number: 20040188327Abstract: A process for fractionating and treating of a full range naphtha stream. The full boiling range naphtha stream is first split into a light boiling range naphtha, an intermediate boiling range naphtha and a heavy boiling range naphtha. The bottoms are subjected to hydrodesulfurization and the effluent combined with the intermediate boiling range naphtha containing thiophene and thiophene boiling range mercaptans and subjected to a second hydrodesulfurization. The effluent from the polishing reactor may be combined with the light boiling range naphtha to produce a new full boiling range naphtha containing substantially less total sulfur than the original feed. The mercaptans in the light naphtha may be removed by thioetherification prior to splitting or by wet caustic wash afterwards. The object being to meet higher standards for sulfur removal, by treating the components of the naphtha feed with the process that preserves the olefinic while most expediently removing the sulfur compounds.Type: ApplicationFiled: December 12, 2001Publication date: September 30, 2004Applicant: CATALYTIC DISTILLATION TECHNOLOGIESInventor: Willibrord A. Groten
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Patent number: 6797154Abstract: With this invention, high conversion of heavy gas oils and the production of high quality products is possible in a single high-pressure loop with reaction stages operating at different pressure and conversion levels. The flexibility offered is great and will allow the refiner to avoid decrease in product quality while at the same time minimizing capital cost. Feeds with varying boiling ranges can be introduced at different sections of the process, thereby minimizing the consumption of hydrogen and further reducing capital investment.Type: GrantFiled: March 21, 2002Date of Patent: September 28, 2004Assignee: Chevron U.S.A. Inc.Inventors: Ujjal Kumar Mukherjee, Wai Seung W. Louie, Arthur J. Dahlberg