Ethylene Product Per Se Patents (Class 585/650)
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Patent number: 6953872Abstract: This invention relates to a process of producing C2- to C4-olefins from steam and a feed mixture containing C4- to C8-olefins, wherein the feed mixture containing steam is introduced into a reactor with an inlet temperature of 300 to 700° C., said reactor comprising a bed of granular, form-selective zeolite catalyst, and wherein a product mixture containing steam and C2- to C4-olefins is withdrawn from the bed and is passed through at least one cooling means.Type: GrantFiled: May 31, 2000Date of Patent: October 11, 2005Assignee: MG Technologies AGInventors: Ulrich Koss, Martin Rothaemel, Peter König
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Patent number: 6926820Abstract: A method of inhibiting fouling and viscosity increase in hydrocarbon streams including ethylenically unsaturated monomers is disclosed. The method includes the step of adding to the hydrocarbon stream an effective amount of one or more quinone methides of the formula: wherein R1, R2, and R3 are independently selected from the group consisting of H, —OH, —SH, —NH2, alkyl, cycloalkyl, heterocyclo, and aryl.Type: GrantFiled: September 20, 2002Date of Patent: August 9, 2005Assignee: G.E. Betz, Inc.Inventors: Sherif Eldin, Grace B. Arhancet
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Patent number: 6888038Abstract: A method for reducing the formation of undesired heavy hydrocarbons when catalytically cracking a heavy olefin containing feed stock to a light olefin product by employing an oxygen containing hydrocarbon as a co-feed stock.Type: GrantFiled: March 18, 2002Date of Patent: May 3, 2005Assignee: Equistar Chemicals, LPInventors: Donald H. Powers, Kenneth M. Webber
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Patent number: 6867341Abstract: A process is disclosed for enhancing the production of light olefins using a catalyst with small pores. The catalyst comprises a molecular sieve having 10 membered rings with channels of limited length. The molecular sieve has a high silica to alumina ratio and has pores sized to limit production of aromatics in the cracking process.Type: GrantFiled: September 17, 2002Date of Patent: March 15, 2005Assignee: UOP LLCInventors: Hayim Abrevaya, Suheil F. Abdo, R. Lyle Patton
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Patent number: 6844476Abstract: A method for converting heavy olefins present in a product stream exiting a first reaction zone into light olefins and carbonaceous deposits on a catalyst without separation of the heavy olefins from the product stream exiting the first reaction zone. The method comprises creating the product stream exiting the first reaction zone, the product stream exiting the first reaction zone comprising the heavy olefins, moving the product stream exiting the first reaction zone to a second reaction zone without separation of the heavy olefins from the product stream exiting the first reaction zone, and contacting the product stream exiting the first reaction zone with the catalyst under conditions effective to form the light olefins, the contacting causing the carbonaceous deposits to form on at least a portion of the catalyst.Type: GrantFiled: July 10, 2002Date of Patent: January 18, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Stephen N. Vaughn, Peter G. Ham, Keith H. Kuechler
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Patent number: 6835863Abstract: A C4+ naphtha hydrocarbon feed is converted to light olefins and aromatics, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, a substantially inert matrix material such as silica and/or clay, having less than about 20 wt % active matrix material based on total catalyst composition, and phosphorus.Type: GrantFiled: July 12, 1999Date of Patent: December 28, 2004Assignee: ExxonMobil Oil CorporationInventors: Art W. Chester, Ke Liu, Robert A. Ware
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Patent number: 6830676Abstract: A cracking tube includes a lining of a fouling resistant and corrosion resistant iron aluminide alloy. The iron aluminide alloy can include 14-32 wt. % Al, at least 2 vol. % transition metal oxides, 0.003 to 0.020 wt. % B, 0.2 to 2.0 wt. % Mo, 0.05 to 1.0 wt. % Zr, 0.2 to 2.0 wt. % Ti, 0.10 to 1.0 wt. % La, 0.05 to 0.2 wt. % C., balance Fe, and optionally ≦1 wt. % Cr, and the coefficient of thermal expansion of the iron aluminide alloy is substantially the same as the coefficient of thermal expansion over the temperature range of ambient to about 1200° C. of an outer metal layer. A cracking tube utilizing the iron aluminide alloy can be formed from powders of the iron aluminide alloy by consolidation methods including cold isostatic pressing (CIP), hot isostatic pressing (HIP), reaction synthesis, spraying techniques, or co-extrusion with a second material of the cracking tube.Type: GrantFiled: June 11, 2001Date of Patent: December 14, 2004Assignee: Chrysalis Technologies IncorporatedInventor: Seetharama C. Deevi
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Patent number: 6803494Abstract: A process for producing polypropylene from olefins selectively produced from a catalytically cracked or thermally cracked naphtha stream is disclosed herein. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures from about 500° C. to 650° C. and a hydrocarbon partial pressure from about 10 to 40 psia. The catalyst may be pre-coked with a carbonaceous feed. Alternatively, the carbonaceous feed used to coke the catalyst may be co-fed with the naphtha feed.Type: GrantFiled: May 19, 2000Date of Patent: October 12, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Paul K. Ladwig, John E. Asplin, Gordon F. Stuntz, William A. Wachter, Brian Erik Henry, Shun C. Fung
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Publication number: 20040186336Abstract: The invention consists of an application of radiant burners to furnaces for heat treatment of hydrocarbon feedstocks in which the feedstock that is to be treated circulates inside an exchange tube bundle that receives the heat that is emitted by the burners essentially by radiation and for which a strict monitoring of the temperature profile along the exchange bundle is necessary. Applied to steam-cracking furnaces, the invention makes it possible to increase the propylene yield to iso ethylene yield. It also makes it possible to increase the compactness of the furnace and the longevity of the exchange bundle and to reduce the NOx emissions.Type: ApplicationFiled: January 27, 2004Publication date: September 23, 2004Inventors: Gerard Martin, Luc Nougier, Etienne Lebas
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Patent number: 6791002Abstract: A riser reactor system for conversion of hydrocarbon feedstock to ethylene and propylene is described. The riser reactor system prevents riser reactors with a plurality of inlet ports for feeding gases having different compositions and for controlling the residence time of a gas catalyst within the riser reactor.Type: GrantFiled: December 11, 2002Date of Patent: September 14, 2004Assignee: UOP LLCInventors: Hayim Abrevaya, Joel T. Walenga, Michael A. Schultz, Anil R. Oroskar
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Patent number: 6784329Abstract: Provided is a process for converting methane at a remote natural gas site into ethylene and other products. Methane is converted into syngas which is converted into a low-sulfur liquid hydrocarbon mixture containing less than 1 ppm sulfur via Fischer-Tropsch (FT) syntheses. The low-sulfur Fischer-Tropsch liquids are transferred from the remote site to an existing facility where a sulfur-containing compound or a sulfur-containing hydrocarbon mixture is added to avoid coking problems. The resultant blend of hydrocarbons which has a sulfur content of at least 1 ppm, is fed to a naphtha cracking unit and ethylene recovered.Type: GrantFiled: January 14, 2002Date of Patent: August 31, 2004Assignee: Chevron U.S.A. Inc.Inventors: Dennis J. O'Rear, Gunther H. Dieckmann
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Publication number: 20040147794Abstract: The present invention discloses a process for cracking a hydrocarbon feedstock into olefinic hydrocarbon products in a furnace at a temperature of above about 1300° F. in a reactor furnace tube comprising a plurality of reaction lines constructed of a temperature-resistant, non-nickel containing material.Type: ApplicationFiled: January 24, 2003Publication date: July 29, 2004Inventors: David J. Brown, Martyn D. Roberts
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Publication number: 20040122277Abstract: Dialkyl polysulfides can be added to hydrocarbon gas fed streams for alkene steam crackers for the petrochemical industry. The polysulfides act as sulfiding agents for surfaces of the steam crackers and thereby reduce coking and CO generation. A preferred polysulfide is a di-t-butyl polysulfide. Such compounds tend to have lower vapor pressure, reasonable viscosities, and are relatively nonflammable as compared to the lower molecular weight sulfur containing compounds.Type: ApplicationFiled: October 3, 2003Publication date: June 24, 2004Inventors: Fred E. Heller, Charles D. Roberts
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Patent number: 6734331Abstract: A process for producing olefins and diolefins. A flow of gas is compressed with a prime mover in a near adiabatic path. Resistance to the flow within the adiabatic path causes a temperature rise with respect to its pressure, where it enters a near adiabatic tunnel. At least one other gas is provided into the tunnel at a prescribed, independently controlled temperature and pressure. The compressed flow is comingled and mixed with at least one other gas. Hydrogen and oxygen are fed into the tunnel to produce steam. Steam is applied to at least one hydrocarbon for pyrolysis or thermal cracking to yield at least one of olefins and diolefins.Type: GrantFiled: July 11, 2002Date of Patent: May 11, 2004Assignee: EGT Developments, LLCInventors: Anthony Cirrito, Bernard Ennis
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Publication number: 20040055330Abstract: A method for thawing and removing frozen material from a cryogenic separation unit such as that found in an olefin production plant comprising employing a flushing agent to thaw and remove the frozen material, purging the flushing agent with a gas, and removing residual flushing agent with a solvent that is miscible with the flushing agent and has a freezing temperature substantially lower than the flushing agent.Type: ApplicationFiled: September 5, 2002Publication date: March 25, 2004Inventors: Raghu S. Narayan, Steven T. Coleman, James H. Walker
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Publication number: 20040039240Abstract: A method for utilizing whole crude oil as a feedstock for the pyrolysis furnace of an olefin production plant wherein the feedstock after preheating is subjected to mild cracking conditions until substantially vaporized, the vapors from mild cracking being subjected to severe cracking in the radiant section of the furnace.Type: ApplicationFiled: August 26, 2002Publication date: February 26, 2004Inventor: Donald H. Powers
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Patent number: 6696614Abstract: Catalyst for steam cracking reactions consisting of pure mayenite having the general formula: 12CaO.7Al2O3 having an X-ray diffraction spectrum as indicated in Table I, obtained with a preparation process comprising the following steps: dissolution of salts containing calcium and aluminum with water; complexing of the dissolved salts by means of polyfunctional organic hydroxyacids; drying of the solution resulting from the completing in order to obtain a solid precursor product; calcination of the solid precursor product at a temperature ranging from 1300 to 1400° C. for at least two hours.Type: GrantFiled: December 4, 2002Date of Patent: February 24, 2004Assignees: ENICHEM S.p.A., ENITECNOLOGIE S.p.A.Inventors: Paolo Pollesel, Caterina Rizzo, Carlo Perego, Renato Paludetto, Gastone Del Piero
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Patent number: 6677496Abstract: A process for the coproduction of purified benzene and ethylene is provided. The method comprises providing a first mixture comprising benzene, toluene, and one or more C6 to C7 non-aromatics and separating the majority of the benzene and the one or more C6 to C7 non-aromatics from the majority of the toluene to form a second mixture containing benzene and at least a portion of the one or more C6 to C7 non-aromatics. Thereafter at least about 80% of the C6 to C7 non-aromatics in the second mixture are cracked while maintaining essentially no cracking of benzene to produce a cracked product containing ethylene, propylene and pyrolysis gasoline comprising olefins, di-olefins and benzene. The pyrolysis gasoline is preferably hydrotreated and then fractionated to form a purified benzene product comprising at least about 80 wt % benzene. The purified benzene can be used as a feed to a liquid phase or mixed phase alkylation and/or to produce ethylbenzene or cumene.Type: GrantFiled: October 23, 2001Date of Patent: January 13, 2004Inventor: David Netzer
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Patent number: 6652737Abstract: Disclosed is a method for treating naphtha. The method comprises providing naphtha feed, and the naphtha feed comprises naphthene ring-containing compounds. The naphtha feed is contacted with a ring opening catalyst containing a Group VIII metal under conditions effective to ring open the naphthene rings to form a ring opened product. The ring open product can then be contacted with a catalytic cracking catalyst under effective cracking conditions to form an olefin product. The olefin product will be particularly high in ethylene and propylene content.Type: GrantFiled: July 2, 2001Date of Patent: November 25, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Michele S. Touvelle, Darryl P. Klein, Tan-Jen Chen, Luc R. Martens, Edward S. Ellis
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Patent number: 6632351Abstract: A crude oil feedstock or crude oil fractions containing pitch feedstock is pyrolyzed in a pyrolysis furnace.Type: GrantFiled: March 8, 2000Date of Patent: October 14, 2003Assignee: Shell Oil CompanyInventors: Daniel Yuk-Kwan Ngan, Pui-Yuen Jeffrey Chan, Arthur James Baumgartner
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Publication number: 20030171634Abstract: A catalytic cracking process for selectively producing C2 to C4 olefins is described in which a feedstock containing hydrocarbons having at least 5 carbon atoms is contacted, under catalytic cracking conditions, with a catalyst composition comprising the synthetic porous crystalline material ITQ-13 and, optionally, a large pore molecular sieve, such as zeolite Y.Type: ApplicationFiled: February 14, 2003Publication date: September 11, 2003Inventor: Avelino Corma
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Publication number: 20030149322Abstract: The feed hydrocarbon together with steam is passed as vapor through a thermal steam cracking in which it is heated to temperatures in the range from 700 to 1000° C., where a cracking mixture is produced which contains C2- to C6-olefins and C4- to C6-diolefins. From the cracking mixture a first fraction, which contains C2- and C3-olefins, and a second fraction, which contains olefins and diolefins of the range C4 to C6, are separated. The diolefins are at least partly removed from the second fraction, and an intermediate product is produced which consists of C4- to C6-olefins for at least 30 wt-%. A feed mixture containing C4- to C6-olefins and steam is introduced into a reactor with an inlet temperature of 300 to 700° C., which reactor contains a bed of granular, form-selective catalyst, where a product mixture containing C2- to C4-olefins is withdrawn from the bed and C2- and C3-olefins are separated from the product mixture.Type: ApplicationFiled: December 16, 2002Publication date: August 7, 2003Inventors: Ulrich Koss, Peter Konig, Martin Rothaemel
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Publication number: 20030100812Abstract: There is provided with a process for separating normal paraffins from hydrocarbons of C5-10 using zeolite molecular sieve 5A, which comprises the steps of (a) selective adsorption (b) cocurrent purge (c) countercurrent desorption. The present process employs butane for purge and desorption step to achieve excellent desorption efficiency and recycles butane in liquid phase to reduce the investment cost. The optimum operating conditions for feedstock change and adsorption capacity reduction are determined by NIR system for on-line monitoring and control. The separated normal paraffins can be efficiently applied to raw material for ethylene production and the separated non-normal paraffins can be efficiently applied to raw material for aromatic hydrocarbons production.Type: ApplicationFiled: August 13, 2002Publication date: May 29, 2003Inventors: Sun Choi, Sung-Joon Lee, Sin-Chul Kang, Sang-Won Kim, Min-Sik Ku, Ahn-Seop Choi, Byoung-Mu Chang
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Publication number: 20030094398Abstract: A process is provided to produce a dilute ethylene stream and a dilute propylene stream to be used as feedstocks for producing olefin-based derivatives. Specifically, the dilute ethylene stream is used as a feedstock to produce ethylbenzene, and the dilute propylene stream is used as a feedstock to produce cumene, acrylic acid, propylene oxide and other propylene based derivatives.Type: ApplicationFiled: November 16, 2001Publication date: May 22, 2003Inventors: Rodney L. Porter, Anne M. Balinsky, Eric P. Weber
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Patent number: 6548725Abstract: A catalyst and an improved process for producing olefins by catalytic naphtha cracking are described. The process provides relatively higher yields over a commercially important range of naphtha conversion, while providing about the same or lower yields of aromatics and methane over the range. In the process, a hydrocarbon naphtha feedstock including a hydrocarbon having about three to about twenty carbon atoms per molecule is passed into a reactor containing a pentasil zeolite catalyst. The catalyst includes about 0.1 to about 10 weight percent phosphorus and about 0.1 to about 10 weight percent of a promoter metal selected from the group consisting of gallium, germanium, tin and mixtures thereof. The hydrocarbon may be passed into the reactor together with a diluent selected from the group consisting of steam, nitrogen, methane, and ethane and mixtures thereof. Alternatively, the hydrocarbon may be passed into the reactor together with additional propane.Type: GrantFiled: July 31, 2001Date of Patent: April 15, 2003Assignee: BP Corporation North America Inc.Inventors: Gilbert Fernand Alphonse Froment, Wilfried Jozef Hippolyte Dehertog, Mark P. Kaminsky
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Patent number: 6538169Abstract: An FCC process for obtaining light olefins comprises contacting a hydrocarbon feed stream with blended catalyst comprising regenerated catalyst and coked catalyst. The catalyst has a composition including a first component and a second component. The second component comprises a zeolite with no greater than medium pore size wherein the zeolite comprises at least 1 wt-% of the catalyst composition. The contacting occurs in a riser to crack hydrocarbons in the feed stream and obtain a cracked stream containing hydrocarbon products including light olefins and coked catalyst. The cracked stream is passed out of an end of the riser such that the hydrocarbon feed stream is in contact with the blended catalyst in the riser for less than or equal to 2 seconds on average.Type: GrantFiled: November 13, 2000Date of Patent: March 25, 2003Assignee: UOP LLCInventors: Rusty M. Pittman, Lawrence L. Upson
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Publication number: 20030037488Abstract: The invention relates to mixed phase materials for the preparation of catalytic membranes which exhibit ionic and electronic conduction and which exhibit improved mechanical strength compared to single phase ionic and electronic conducting materials. The mixed phase materials are useful for forming gas impermeable membranes either as dense ceramic membranes or as dense thin films coated onto porous substrates. The membranes and materials of this invention are useful in catalytic membrane reactors in a variety of applications including synthesis gas production. One or more crystalline second phases are present in the mixed phase material at a level sufficient to enhance the mechanical strength of the mixture to provide membranes for practical application in CMRs.Type: ApplicationFiled: September 19, 2002Publication date: February 27, 2003Inventors: Pamela Van Calcar, Richard Mackay, Anthony F. Sammells
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Patent number: 6500404Abstract: The present invention refers to a crystalline material of zeolitic nature named ITQ-3 characterized by its characteristic X-ray diffraction pattern and its microporous properties, to the process of preparation thereof characterized by the use of one or several organic additives in a reaction mixture that is made to crystallize by heating and to the use thereof in processes of separation and transformation of organic compounds, which material has the empirical formula x(M1/nXO2):yYO2:SiO2 where x has a value lower than 0.15 and may be equal to zero; and y has a value lower than 0.1 and may be equal to zero; M is H+ or an inorganic cation of charge +n, X is a chemical element with oxidation state (Al, Ge, B and Cr), Y is a chemical element with oxidation state (Ti, Ge and V), and when x=0 and y=0 can be described as a new polymorphous of silica of microporous nature.Type: GrantFiled: February 28, 2000Date of Patent: December 31, 2002Assignees: Consejo Superior de Investigacones Cientificas, Universidad Politecnica de ValenciaInventors: Miguel-Angel Camblor Fernandez, Avelino Corma Canos, Luis-Angel Villaescusa Alonso
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Patent number: 6497809Abstract: Process for prolonging the effectiveness of a pyrolytic cracking tube which has been treated with an antifoulant for inhibiting the formation of coke during the cracking of hydrocarbons. The benefits of such treatment are enhanced by the desulfurization of a sulfur-containing feedstock prior to charging it to the treated pyrolytic cracking tube.Type: GrantFiled: October 25, 1995Date of Patent: December 24, 2002Assignee: Phillips Petroleum CompanyInventors: Ronald E. Brown, Timothy P. Harper, Larry E. Reed
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Patent number: 6488839Abstract: A steam-cracking process with a very high degree of severity of a feedstock that comprises at least 20% by weight of hydrocarbons of the group that is formed by ethane and propane in which the feedstock that is diluted with water vapor is circulated in the radiation zone of a furnace, in at least one pipe with a length L≧14 m and a hydraulic diameter that is greater than or equal to 34 mm in the end portion of the pipe at least, is described under the following conditions of dwell time &tgr; and furnace output temperature COT: 120 ms≦&tgr;≦2800 ms and 858° C.≦COT≦1025° C. to obtain a conversion of at least 77% of ethane of the feedstock if the feedstock contains ethane and/or a conversion of at least 96% of the propane of the feedstock if the feedstock contains propane, and to maintain this conversion for a cycle time that is greater than or equal to about 8 days.Type: GrantFiled: May 10, 2000Date of Patent: December 3, 2002Assignee: Institut Francais du PetroleInventors: Eric Lenglet, Christian Busson, Luc Nougier
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Publication number: 20020156335Abstract: The present invention provides a method for manufacturing an ethylene-vinyl acetate copolymer (EVA) in a polymerization solution in a vessel. The polymerization solution includes ethylene, vinyl acetate, methanol and a polymerization initiator. This method includes: cooling a gas including a vapor evaporated from the polymerization solution whereby to produce a condensate of at least a portion of said gas, and introducing said condensate into the polymerization solution whereby to evaporate at least one component in said condensate. Said vapor includes said at least one component.Type: ApplicationFiled: March 29, 2002Publication date: October 24, 2002Applicant: KURARAY CO., LTD.Inventors: Takaharu Kawahara, Masato Takai
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Patent number: 6455750Abstract: The invention is related to a catalyst and a process for selectively producing light (i.e., C2-C4) olefins from a catalytically cracked or thermally cracked naphtha stream. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions. The catalysts do not require steam activation.Type: GrantFiled: November 10, 1999Date of Patent: September 24, 2002Assignee: ExxonMobil Chemical Patents Inc.Inventors: Todd R. Steffens, Paul K. Ladwig
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Patent number: 6441263Abstract: A process for preparing an ethylene-rich composition from a C3-5 paraffinic feedstock is described. The C3-5 paraffinic feedstock is subjected to molecular redistribution via dehydrogenation to form olefins, metathesis of the olefins, and rehydrogenation of the olefins to form paraffins. The product stream includes ethane, which is isolated and sent to an ethane or ethane/propane cracker (or, alternatively, a flexi-cracker, although this is less cost effective) to yield an ethylene-rich composition. The product stream also includes C3-5 paraffins, which can be recycled, and C6+paraffins, which can be used, for example, as solvents. Alternatively, they can be isomerized to form gasoline additives, or can be converted to aromatic compounds by subjecting them to reforming conditions, for example using the AROMAX™ process or platforming or rheniforming conditions.Type: GrantFiled: July 7, 2000Date of Patent: August 27, 2002Assignee: ChevronTexaco CorporationInventors: Dennis J. O'Rear, Rodney Porter, Cong-Yan Chen
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Patent number: 6429348Abstract: The invention provides a method for converting an olefinic hydrocarbon feedstock to propylene comprising: contacting a hydrocarbon feedstock under catalytic cracking conditions with a catalyst comprising a catalyst selected from the group consisting of SAPO catalysts, MeAPO catalysts, MeASPO catalysts, ElAPO catalysts, ElASPO catalysts, rare earth exchanged catalysts from any of the preceding groups, and mixtures thereof, under cracking conditions to selectively produce propylene. The invention further provides a method for stabilizing a catalyst to steam from the foregoing group by ion exchange with a rare earth metal.Type: GrantFiled: May 5, 1998Date of Patent: August 6, 2002Assignee: ExxonMobil Chemical Patents, Inc.Inventors: Tan-Jen Chen, S. Mark Davis, Luc R. M. Martens, Marcel J. G. Janssen, Philip A. Ruziska
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Patent number: 6420621Abstract: A process for hydrocarbon conversion to prepare lower olefins such as ethylene, propylene, etc., and light aromatics by bringing hydrocarbons into contact with a solid granular catalyst. In order to optimize the reaction conditions and product structure and save the capital and operating costs, a piston flow reactor is used in this process and multiple groups of feed inlets, which allow hydrocarbons with different properties to enter the device from different feed inlets and proceed pyrolysis under different operation conditions, are set on the reactor. This process is usable for individual pyrolysis or co-feed pyrolysis of hydrocarbons from refinery gases, liquid hydrocarbons, to heavy residues.Type: GrantFiled: October 19, 1998Date of Patent: July 16, 2002Assignees: China Petro-Chemical Corp., Luoyang Petrochemical Engineering Corporation SINOPECInventors: Yingxun Sha, Zhongqiang Cui, Guoliang Wang, Mingdang Wang
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Patent number: 6407301Abstract: An adsorptive separation process for preparing the separate feed streams charged to naphtha reforming unit and a steam cracking unit is presented. The feed stream to the overall unit is fractionated to yield a C5 stream and a second stream containing the rest of the feed, which is passed into the adsorptive separation unit. The C5 stream is utilized as the desorbent in the adsorptive separation. The adsorptive separation separates the C6-plus components of the feed stream into a normal paraffin stream, which is charged to the steam cracking process, and non-normal hydrocarbons which are passed into a reforming zone. The invention improves the yields from both downstream units.Type: GrantFiled: October 30, 2000Date of Patent: June 18, 2002Assignee: UOP LLCInventors: Timothy D. Foley, Stephen W. Sohn
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Patent number: 6388161Abstract: A process for cracking an olefin-rich hydrocarbon feedstock which is selective towards propylene in the effluent, the process comprising contacting a hydrocarbon feedstock containing one or more olefinic components of C4 or greater with a crystalline silicate catalyst to produce an effluent having a second composition of one or more olefinic components of C3 or greater, the feedstock and the effluent having substantially the same olefin content by weight therein characterized in that ethylene is added to the feedstock before the feedstock contacts the catalyst.Type: GrantFiled: June 15, 2000Date of Patent: May 14, 2002Assignee: Fina Research, S.A.Inventors: Jean-Pierre Dath, Walter Vermeiren
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Patent number: 6358399Abstract: A process and a device for separating ethane and ethylene from a hydrocarbon steam-cracking effluent is described. Effluent (1) is absorbed in an absorption column (7) by a cooled solvent (9). At the bottom of the column, liquid phase (12) that contains the solvent and the C2+ hydrocarbons is recovered and hydrogenated (15). The hydrogenation effluent that contains the solvent is introduced into a first distillation column (70) where the solvent is regenerated. The solvent is cooled and recycled at the top of absorption column (7). The C2+ hydrocarbons are collected at the top, and a condensed liquid phase is distilled in a second distillation column (77) to recover a C2 fraction that consists of ethane and ethylene.Type: GrantFiled: August 16, 2000Date of Patent: March 19, 2002Assignee: Institute Francais du PetroleInventors: Ari Minkkinen, Jean-Hervé Le Gal, Pierre Marache
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Publication number: 20020028977Abstract: Apparatus for the vaporization of a heavy hydrocarbon feedstock with steam includes a frusto-conically-shaped element which is capable of inducing a gentle swirl pattern to a liquid-containing stream, which device is connected to the feed inlet pipe of the mixing nozzle. This swirl-inducing device effects a 90° bending of the flow direction of the hydrocarbon feedstock while simultaneously effecting a swirl pattern of the liquid part thereof, thereby forcing the liquid against the wall of the feed inlet pipe extending downwardly to the mixing nozzle with such velocity component perpendicular to the tube's longitudinal axis that an annular flow pattern is re-established.Type: ApplicationFiled: May 8, 2001Publication date: March 7, 2002Inventors: Krishnamoorthy Chandrasekharan, Antonius Gijsbertus Johannes Kloth, Jeroen Van Westrenen
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Patent number: 6340429Abstract: A process for separating ethane and ethylene from a hydrocarbon steam-cracking effluent is described. Effluent (1) is absorbed in an absorption column by a cooled solvent (9). At the bottom of the column, the liquid phase that contains the solvent and the C2+ hydrocarbons is recovered and hydrogenated (15). The hydrogenation effluent that contains the solvent is introduced into a first distillation column (16). Ethane-ethylene mixture (17) is drawn off laterally from the column, and a phase (19) that contains the solvent and hydrocarbons with at least 3 carbon atoms is drawn off at the bottom of the column. This phase (19) is separated in a second distillation column (22), and C3+ hydrocarbons and, at the bottom of the column, regenerated solvent (26) that is cooled and that is recycled (9, 52) in the absorption column are collected.Type: GrantFiled: August 16, 2000Date of Patent: January 22, 2002Assignee: Institut Francais du PetroleInventors: Ari Minkkinen, Jean-Hervé Le Gal, Pierre Marache
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Publication number: 20010056217Abstract: A catalyst and an improved process for producing olefins by catalytic naphtha cracking are described. The process provides relatively higher yields over a commercially important range of naphtha conversion, while providing about the same or lower yields of aromatics and methane over the range. In the process, a hydrocarbon naphtha feedstock including a hydrocarbon having about three to about twenty carbon atoms per molecule is passed into a reactor containing a pentasil zeolite catalyst. The catalyst includes about 0.1 to about 10 weight percent phosphorus and about 0.1 to about 10 weight percent of a promoter metal selected from the group consisting of gallium, germanium, tin and mixtures thereof. The hydrocarbon may be passed into the reactor together with a diluent selected from the group consisting of steam, nitrogen, methane, and ethane and mixtures thereof. Alternatively, the hydrocarbon may be passed into the reactor together with additional propane.Type: ApplicationFiled: July 31, 2001Publication date: December 27, 2001Inventors: Gilbert Fernand Alphonse Froment, Wilfried Jozef Hippolyte Dehertog, Mark P. Kaminsky
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Publication number: 20010056216Abstract: A process for hydrocarbon conversion to prepare lower olefins such as ethylene, propylene, etc., and light aromatics by bringing hydrocarbons into contact with a solid granular catalyst. In order to optimize the reaction conditions and product structure and save the capital and operating costs, a piston flow reactor is used in this process and multiple groups of feed inlets, which allow hydrocarbons with different properties to enter the device from different feed inlets and proceed pyrolysis under different operation conditions, are set on the reactor. This process is usable for individual pyrolysis or co-feed pyrolysis of hydrocarbons from refinery gases, liquid hydrocarbons, to heavy residues.Type: ApplicationFiled: October 19, 1998Publication date: December 27, 2001Inventors: YINGXUN SHA, ZHONGQIANG CUI, GUOLIANG WANG, MINGDANG WANG
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Publication number: 20010053868Abstract: A C4+naphtha hydrocarbon feed is converted to light olefins and aromatics, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, a substantially inert matrix material such as silica and/or clay, having less than about 20 wt % active matrix material based on total catalyst composition, and phosphorus.Type: ApplicationFiled: July 12, 1999Publication date: December 20, 2001Inventors: ARTHUR W. CHESTER, KE LIU, ROBERT A. WARE
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Patent number: 6315890Abstract: The invention is related to a two step process wherein the first step comprises cracking an olefinic naphtha resulting in a cracked product having a diminished total concentration of olefinic species. The second step comprises hydroprocessing at least a portion of the cracked product, especially a naphtha fraction, to provide a hydroprocessed cracked product having a reduced concentration of contaminant species but without a substantial octane reduction.Type: GrantFiled: November 10, 1999Date of Patent: November 13, 2001Assignee: ExxonMobil Chemical Patents Inc.Inventors: Paul K. Ladwig, Gordon F. Stuntz, Garland B. Brignac, Thomas R. Halbert
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Patent number: 6313366Abstract: A process for producing propylene from a catalytically cracked or thermally cracked naphtha stream is disclosed herein. The naphtha stream is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures from about 500° C. to 650° C. and a hydrocarbon partial pressure from about 10 to 40 psia. A separate stream containing aromatics may be co-fed with the naphtha stream.Type: GrantFiled: May 19, 2000Date of Patent: November 6, 2001Assignee: ExxonMobile Chemical Patents, Inc.Inventors: Paul K. Ladwig, John E. Asplin, Gordon F. Stuntz, William A. Wachter, Brian Erik Henry, Shun C. Fung, Tan-Jen Chen, Jay F. Carpency, Ronald G. Searle
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Patent number: 6303842Abstract: Olefins may be produced by thermally steam cracking residuum containing a short residuum having a boiling point range greater than 565° C. wherein at least 3 weight percent of the short residuum has a boiling point greater than or equal to 650° C. The residuum has pentane insolubles less than or equal to 1.2, ASTM 893. Further, the weight percent of hydrogen of the residuum is greater than or equal to 12.5. Such feedstocks are produced by hydrotreating, where necessary, a petroleum residuum having pentane insolubles less than 1.0, ASTM 893, until the weight percent of hydrogen of the petroleum residuum is 12.5. Where necessary, the petroleum residuum may be deasphalted prior to subjecting it to hydrotreatment.Type: GrantFiled: April 6, 2000Date of Patent: October 16, 2001Assignee: Equistar Chemicals, LPInventors: Robert S. Bridges, Richard B. Halsey, Don H. Powers
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Patent number: 6300537Abstract: Disclosed are silicoaluminates (SAPOs) having unique silicon distributions, a method for their preparation and their use as naphtha cracking catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution.Type: GrantFiled: May 20, 1999Date of Patent: October 9, 2001Assignee: Exxon Research and Engineering CompanyInventors: Karl G. Strohmaier, David E. W. Vaughan, Tan Jen Chen, Philip A. Ruziska, Brian Erik Henry, Gordon F. Stuntz, Stephen M. Davis
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Patent number: 6288298Abstract: Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the catalytic cracking of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from microemulsions containing surfactants.Type: GrantFiled: May 20, 1999Date of Patent: September 11, 2001Assignee: ExxonMobil Chemical Patents Inc.Inventors: Javier Agundez Rodriguez, Joaquin Perez Pariente, Antonio Chica Lara, Avelino Corma Canos, Tan Jen Chen, Philip A. Ruziska, Brian Erik Henry, Gordon F. Stuntz, Stephen M. Davis
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Publication number: 20010016673Abstract: Olefins may be produced by thermally steam cracking a crude oil having pentane insolubles less than or equal to 1.2, ASTM D-893, and a weight percent of hydrogen greater than or equal to 12.5.Type: ApplicationFiled: March 16, 2001Publication date: August 23, 2001Applicant: EQUISTAR CHEMICALS, L.P.Inventors: Robert S. Bridges, Richard B. Halsey, Donald H. Powers
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Patent number: 6271431Abstract: A process for thermal pyrolysis of a feedstock containing at least 80% ethane to convert to ethylene at a conversion rate of at least equal 80% by feeding the feedstock into a reaction zone in which heating means are arranged approximately perpendicular to the direction of flow of the feedstock. The temperature of the outlet of the heating zone in the reaction zone is between 880 and 960° C. and the dwell time of the feedstock in the heating zone is between 1005 and 3000 milliseconds.Type: GrantFiled: December 6, 1999Date of Patent: August 7, 2001Assignee: Institut Francais du PetroleInventors: Christian Busson, Jean-Pierre Burzynski, Henri Delhomme, Luc Nougier