Gum Or Gum Former Removal Patents (Class 208/255)
-
Patent number: 11168270Abstract: This development proposed adding a catalyst to an oxygen stripper. The oxygen stripper would be run at a temperature just below or at coking temp. The oxygen stripper includes a catalyst containing Group VI or VII metals to remove free radicals. Most preferably, the catalyst is a nickel-molybdenum catalyst.Type: GrantFiled: September 29, 2020Date of Patent: November 9, 2021Assignee: MARATHON PETROLEUM COMPANY LPInventor: Howard F. Moore
-
Patent number: 10752842Abstract: The present disclosure refers to a process and a process plant for extraction of metals from a hydrocarbon mixture obtained from a gasification or pyrolysis process, comprising the steps of combining said hydrocarbon mixture with an aqueous acid forming a mixture, mixing said mixture, separating said mixture in a contaminated aqueous phase and a purified hydrocarbon phase, with the associated benefit of said aqueous acid being able to release metals bound in such gasification and pyrolysis processes.Type: GrantFiled: June 30, 2016Date of Patent: August 25, 2020Assignee: HALDOR TOPSØE A/SInventors: Rasmus Gottschalck Egeberg, Angelica Hidalgo Vivas, Søren Selde Enevoldsen
-
Patent number: 10427990Abstract: The present disclosure provides a system and method for recycling intermediate product streams of at least gasoline from the MTP plant to the steam cracker plant for processing with the feedstock of the steam cracker plant to generate a higher percentage of ethylene and propylene. The steam cracker feedstock can be ethane.Type: GrantFiled: March 4, 2016Date of Patent: October 1, 2019Assignee: TECHNIP FRANCEInventors: Jean-Francois Fournier, Eric Stanley Wagner, Jean-Paul Laugier, Stéphane Haag, Thomas Wurzel, Martin Gorny
-
Patent number: 10018761Abstract: A compensation film includes an elongation film having an elongation rate of greater than or equal to about 200% in a uniaxial direction and having a surface energy of about 40 mJ/m2 to about 65 mJ/m2 and a liquid crystal layer disposed on one side of the elongation film and including liquid crystals.Type: GrantFiled: May 5, 2016Date of Patent: July 10, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ju Hyun Kim, Seunghyun Lee, Hyunseok Choi, Beom Seok Kim
-
Patent number: 8846994Abstract: The invention relates to a method for producing low-odor n-butane by catalytic hydrogenation of a feed mixture. The aim of the invention is to provide such a method, wherein the feed material, in addition to n-butane, n-butene and up to 1 mass % formic acid and/or up to 1 mass % pentanals and/or up to 0.5 mass % pentanols, also comprises carbon monoxide. The aim is achieved by treating the feed mixture in the temperature range of 15 to 120° C. with an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the concentration range of 0.5 to 30 mass % and subsequently subjecting the feed mixture to the catalytic hydrogenation.Type: GrantFiled: May 21, 2010Date of Patent: September 30, 2014Assignee: Evonik Degussa GmbHInventors: Hans-Gerd Lueken, Alfred Kaizik, Markus Winterberg, Wilfried Bueschken, Dirk Fridag
-
Patent number: 8524972Abstract: This disclosure relates generally to low temperature steam stripping methods for byproduct polymer and solvent separation from an ethylene oligomerization process. The methods disclosed have been found to separate byproduct polymer from solvent without fouling process equipment or causing other process problems. The byproduct polymer ends up as flowable solid particles in a water stream that may be easily discharged from the process, while solvent is recovered for recycle to the process. In embodiments of the invention, over 90 wt % of the solvent used is recovered and the discharged byproduct polymer is less than 20 wt % solvent.Type: GrantFiled: April 18, 2012Date of Patent: September 3, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael W. Weber, Randy L. Foster, James R. Lattner, Jimmy L. Tardy, Michael J. Veraa
-
Publication number: 20130199966Abstract: A method of producing an aluminium oxide supported catalyst for use in a Fischer-Tropsch synthesis reaction, which comprises: spray-drying a slurry of ?-alumina and a source of a spinel forming metal to form a solid precursor material; calcining the precursor material to form a modified support material including a metal aluminate spinel; impregnating the modified alumina support material with a source of cobalt; calcining the impregnated support material, and activating the catalyst.Type: ApplicationFiled: July 29, 2011Publication date: August 8, 2013Applicant: GTL.F1 AGInventors: Manoj M. Koranne, Erling Rytter, Sigrid Eri, Oyvind Borg
-
Patent number: 8398849Abstract: A system and method are outlined for controlling and optimizing chemical injection into a process unit to control fouling. The method uses an optical device to measure the fouling propensity of the process fluid at various points within the process unit. The measurements are compared with one another and prediction methods are used to evaluate the fouling potential within the unit, and determine the proper chemical dosage. Antifoulant chemical is then introduced into the unit to control the rate of fouling. The method and application continue on a frequent basis to maintain optimal fouling control within the unit.Type: GrantFiled: December 3, 2009Date of Patent: March 19, 2013Assignee: General Electric CompanyInventors: Collin Wade Cross, Andre Vanhove, David Owen
-
Patent number: 8388830Abstract: A process is presented for the removal of oxygen from a hydrocarbon stream. The oxygen can react and cause polymerization of the hydrocarbons when the hydrocarbon stream is heated. Controlling the removal of the oxygen from the hydrocarbon stream produces a hydrocarbon stream that is substantially free of oxygen and has a reduced activity for generating undesired compounds.Type: GrantFiled: June 7, 2011Date of Patent: March 5, 2013Assignee: UOP LLCInventors: Stephen W. Sohn, Steven P. Lankton, Joao Jorge da Silva Ferreira Alves
-
Patent number: 8075763Abstract: The present invention provides a process for the treatment of crude oil or aged crude oil residue comprising the steps of (a) contacting the oil or residue with a phenol resin and with a diluent, to provide a diluted phenol resin treated oil or residue; and (b) optionally removing solid material from the diluted phenol resin treated oil or residue.Type: GrantFiled: December 21, 2006Date of Patent: December 13, 2011Assignee: Innospec LimitedInventors: Andrea Sneddon, Jenny-Ann Ostlund
-
Patent number: 7993514Abstract: A method and apparatus for removing peroxides from an exposed naphtha stream is shown and described. The process includes the catalytic reactive oxygen stripping of peroxides thereby generating hydrocarbons and oxygen. Numerous conventional catalysts may be employed. The catalytic stripping reaction can be carried out at substantially lower temperatures than conventional reboiled oxygen strippers thereby resulting in substantial energy savings. Further, the disclosed reactor vessels are substantially smaller and less expensive to build than conventional oxygen stripper columns The disclosed energy efficient reactive oxygen stripping process and equipment is intended to be utilized upstream of a naphtha hydrotreating unit.Type: GrantFiled: January 28, 2008Date of Patent: August 9, 2011Assignee: UOP LLCInventors: William D. Schlueter, Julian A. Vickers, Gail L. Grady
-
Patent number: 7803270Abstract: A process is described for the extractive oxidation of contaminants present in raw fuel streams rich in heteroatomic polar compounds and catalyzed by iron oxides contained in natural limonitic goethite, said process comprising contacting said streams with an oxidation pair which is a peroxide in solution/organic acid in amount of at least 3 and an amount between 0.01 and 10 wt % of an iron oxide, both based on the feed, the iron oxide being made up of a reduced natural limonitic goethite. The goethite reduction by a hydrogen stream has the advantage of lowering the migration of non-contaminating polar hydrocarbons from the fuel stream to the aqueous phase, at the same time obtaining higher mass yield of final product fuel while the level of target contaminants to be removed is maintained relative to the state-of-the-art process. Process yields attain 98% weight/weight.Type: GrantFiled: March 14, 2005Date of Patent: September 28, 2010Assignee: Petroleo Brasileiro S.A. - PetrobrasInventors: Wladmir Ferraz de Souza, Lilian Ernst
-
Patent number: 7799212Abstract: A method which controls sedimentation occurring at a heat exchanger for cooling hydrodesulfurization/hydrocracking residue containing asphaltenes at a high content and thereby prevents fouling of the heat exchanger is disclosed. A method for preventing fouling of a heat exchanger for cooling hydrodesulfurization/hydrocracking residue, which injects flux oil into hydrodesulfurization/hydrocracking residue containing asphaltenes at 1% by mass or more, wherein the flux oil is at least one species of residue selected from the group consisting of crude vacuum distillation residue and fluidized catalytic cracking residue, and injected into the hydrodesulfurization/hydrocracking residue to control its actual sediment content at 0.2% by mass or less, determined in accordance with IP-375 is also disclosed.Type: GrantFiled: February 27, 2006Date of Patent: September 21, 2010Assignees: Tonen General Sekiyu K.K., Showa Shell Sekiyu K.K., Research Association of Refinery Integration for Group OperationInventors: Norihiro Nakashima, Masayoshi Kuwbara, Manabu Higo, Hiroyuki Kobayashi
-
Patent number: 7740750Abstract: A system and method for quantifying opaque inhomogeneities within a fluid sample. The system uses an optical lens system to focus a light beam onto a stage where the sample is introduced. The light beam is directed onto the sample in a pattern such that the intensity of transmitted light is measured as a function of path length. A photo detector measures the transmitted light through the sample. Fluctuations in transmitted light intensity are then correlated with detection of opaque inclusions in the sample. The system also includes an automated program which utilizes these optical concentration measurements to determine the fouling potential of visbroken tars, and regulates the introduction of chemical inhibitors into a visbreaker unit to improve the yield of light streams and/or economic value of product.Type: GrantFiled: July 7, 2006Date of Patent: June 22, 2010Assignee: GE Betz, Inc.Inventors: Andre Vanhove, Tiffany N. Morris, Alan E. Goliaszewski, Brian W. Lasiuk, Donato Vinciguerra
-
Patent number: 7691258Abstract: A process for treating a hydrocarbon liquid composition to improve its storage and/or transportation stability, comprises contacting the hydrocarbon liquid composition with a polar trap, wherein the conductivity of the hydrocarbon liquid composition is not reduced by said contacting with a polar trap. The polar trap may be a clay treater containing attapulgus clay. The process may include sequentially passing the hydrocarbon liquid composition through a dehydrator and a clay treater at a flow rate of between about 100 and about 1000 m3 per hour. Advantageously, the hydrocarbon liquid composition is refined and in particular, may be a Merox™-treated jet fuel.Type: GrantFiled: June 4, 2007Date of Patent: April 6, 2010Assignee: Emirates National Oil Company Limited (ENOC) LLCInventor: Maharajapuram Subramanian Venkateshan
-
Publication number: 20090314688Abstract: A method for degumming and/or refining crude oil containing impurities involving mixing the crude oil with degumming agents, i.e., water or acid, and subjecting the mixture to flow-through, hydrodynamic cavitation processing. The cavitational processing transfers impurities in the crude oil to a water phase for easier separation. The water phase may be separated from the oil phase by commonly available separation methods.Type: ApplicationFiled: June 15, 2009Publication date: December 24, 2009Inventors: Roman Gordon, Igor Gorodnitsky, Varvara Grichko
-
Patent number: 7491318Abstract: The invention relates to a method for prevention of corrosion by naphthenic acids in a refinery comprising the use of a compound of the formula HS—B—COOR, where B is a saturated bivalent 1-18 C hydrocarbon and R is H, alkaline or alkaline earth metal, ammonium, straight or branched alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl with 1-18 C atoms.Type: GrantFiled: June 25, 2004Date of Patent: February 17, 2009Assignee: Arkema FranceInventor: Francis Humblot
-
High-solvency-dispersive-power (HSDP) crude oil blending for fouling mitigation and on-line cleaning
Publication number: 20090038994Abstract: A high solvency dispersive power (HSDP) crude oil is added to a blend of incompatible and/or near-incompatible oils to proactively address the potential for fouling heat exchange equipment. The HSDP component dissolves asphaltene precipitates and maintains suspension of inorganic particulates before coking affects heat exchange surfaces. HSDP co-blending for fouling mitigation and on-line cleaning can be affected using different concentrations of top-performing and moderate-performing HSDP crude oils.Type: ApplicationFiled: August 15, 2008Publication date: February 12, 2009Applicant: ExxonMobil Research and Engineering CompanyInventors: Glen B. Brons, Chris A. Wright -
Publication number: 20090032435Abstract: Atmospheric and/or vacuum resid fractions of a high solvency dispersive power (HSDP) crude oil are added to a blend of crude oil to prevent fouling of crude oil refinery equipment and to perform on-line cleaning of fouled refinery equipment. The HSDP resid fractions dissolve asphaltene precipitates and maintain suspension of inorganic particulates before coking affects heat exchange surfaces.Type: ApplicationFiled: August 15, 2008Publication date: February 5, 2009Applicant: ExxonMobil Research and Engineering CompanyInventors: Glen B. Brons, Chris A. Wright, George A. Lutz, Mark A. Greaney
-
Patent number: 7431829Abstract: The present invention refers to a method for the regeneration of used petroleum oils which comprises the following steps: (a) demetallization of the used mineral oil by means of chemical treatment of said oil with an aqueous solution of a chemical reagent containing anions which form low solubility salts with the metals of the oil, followed by the separation of the demetallized oil; (b) distillation of the demetallized oil obtained in step (a) at atmospheric pressure and in the presence of alkaline hydroxides; and (c) distillation of the bottom liquid obtained in the atmospheric distillation in step (b) under vacuum and in the presence of alkaline hydroxides to obtain lubricant bases.Type: GrantFiled: September 23, 2004Date of Patent: October 7, 2008Assignee: Sener Grupo De Ingenieria, S.A.Inventor: Jeronimo Angulo Aramburu
-
Publication number: 20080041762Abstract: A high solvency dispersive power (HSDP) crude oil is added to a blend of incompatible oils to proactively address the potential for fouling heat exchange equipment. The HSDP component dissolves asphaltene precipitates and maintains suspension of inorganic particulates before coking affects heat exchange surfaces. An HSDP oil is also flushed through heat exchange equipment to remove any deposits and/or precipitates on a regular maintenance schedule before coking can affect heat exchange surfaces.Type: ApplicationFiled: August 21, 2006Publication date: February 21, 2008Applicant: ExxonMobil Research and Engineering Company Law DepartmentInventors: Glen B. Brons, Chris A. Wright, George A. Lutz, Daniel P. Leta
-
Publication number: 20070289900Abstract: A process for reducing the polynuclear aromatics (PNA) content of a sulfur-containing hydrocarbon stream. The process includes contacting the sulfur-containing hydrocarbon stream with a dearomatization composition comprising a promoter metal component and zinc oxide. The dearomatization composition has enhanced resistance to sulfur poisoning and is also effective to remove sulfur from the hydrocarbon stream.Type: ApplicationFiled: June 14, 2006Publication date: December 20, 2007Inventors: Walter E. Alvarez, Glenn W. Dodwell, Tushar V. Choudhary
-
Patent number: 7270737Abstract: For desulfurization of a hydrocarbon-containing feedstock, at least one stage for selective hydrogenation of diolefins present in the initial hydrocarbon feedstock, in the presence of a catalyst of group VIII of the period table, and a stage for extraction by a solvent of the resultant hydrogenated fraction under conditions that provide at least two fractions: a raffinate that comprises for the most part olefins, paraffins and naphthenes and a reduced amount of sulfur-containing compounds that are contained in the initial feedstock, a fraction that contains the majority of the aromatic hydrocarbons and the majority of the sulfur-containing compounds contained in the initial feedstock.Type: GrantFiled: November 13, 2003Date of Patent: September 18, 2007Assignee: Institut Francais du PetroleInventors: Florent Picard, Raphaël Huyghe
-
Patent number: 7202391Abstract: According to the present invention, there is provided a process for inhibiting the polymerization of an aromatic vinyl compound which is capable of efficiently inhibiting the polymerization of an aromatic vinyl compound not only in an initial stage but also over a long term in the stage of producing, purifying, storing or transporting the aromatic vinyl compound, and which is excellent in handling. The present invention relates to a process for inhibiting the polymerization of an aromatic vinyl compound which requires the step of adding a 2-nitrophenol compound in combination with a sulfonic acid compound to the aromatic vinyl monomer during the stage of producing, purifying, storing or transporting the aromatic vinyl compound.Type: GrantFiled: April 18, 2002Date of Patent: April 10, 2007Assignee: Hakuto Co., Ltd.Inventors: Seiji Tanizaki, Junichi Nakajima
-
Patent number: 7175755Abstract: A process for the extractive oxidation of contaminants from raw hydrocarbon streams rich in heteroatomic polar compounds is described, the said process involving the extractive oxidation of sulfur and nitrogen compounds from said streams, the said process comprising treating said streams with a peroxide solution/organic acid couple, the weight percent of the peroxide solution and organic acid based on raw hydrocarbon being at least 3 for both the peroxide and organic acid solution, under an acidic pH, atmospheric or higher pressure and ambient or higher temperature. As a result of the reaction, the oxidized heteroatomic compounds, having strong affinity for the aqueous phase, are extracted into said aqueous phase, while the oxidized hydrocarbon is neutralized, water washed and dried, the resulting end product being a hydrocarbon stream from which have been removed 88.1 wt % or more of total nitrogen compounds and basic nitrogen up to 99.1 wt %, both calculated as mass contents, total Sulfur 23.Type: GrantFiled: May 6, 2003Date of Patent: February 13, 2007Assignee: Petroleo Brasileiro S.A.-PetrobrasInventor: Wladmir Ferraz de Souza
-
Patent number: 7153414Abstract: A process for the upgrading of raw hydrocarbon streams rich in heteroatomic polar compounds and/or unsaturated moieties involving the extractive oxidation of sulfur, nitrogen, conjugated dienes and other unsaturated compounds from said streams, the said process comprising treating said streams with a peroxide solution/organic acid couple and an iron oxide catalyst which is a limonite ore, under an acidic pH, atmospheric pressure and ambient or higher temperature. As a result of the reaction, the oxidized heteroatomic compounds, having strong affinity for the aqueous slurry phase, are extracted into said aqueous phase, while the oxidized hydrocarbon is separated from catalyst by decanting, neutralizing, water washing and drying, the resulting end product being a hydrocarbon stream from which have been removed 90% or more of total nitrogen compounds and basic nitrogen up to 99.7%, both calculated as mass contents.Type: GrantFiled: December 10, 2002Date of Patent: December 26, 2006Assignee: Petroleo Brasileiro S.A.-PetrobrasInventor: Wladmir Ferraz De Souza
-
Patent number: 6855244Abstract: In an embodiment, the invention relates to a method for reducing coke agglomeration in petroleum streams derived from coking processes. In a preferred embodiment, the invention relates to a method for mitigating filter fouling from a coker gas oil by using a pusher gas substantially free of molecular oxygen.Type: GrantFiled: July 10, 2002Date of Patent: February 15, 2005Assignee: ExxonMobil Research and Engineering CompanyInventors: Michael Siskin, Simon R. Kelemen
-
Patent number: 6830677Abstract: In an embodiment, the invention relates to a method for reducing coke agglomeration in petroleum streams derived from coking processes. In a preferred embodiment, the invention relates to a method for mitigating filter fouling from a coker gas oil wherein an oxygen scavenger is employed to remove molecular oxygen and peroxides.Type: GrantFiled: July 10, 2002Date of Patent: December 14, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Michael Siskin, Simon R. Kelemen
-
Publication number: 20030221993Abstract: A method for increasing the operational life-time of a pyrolysis gasoline hydrotreating process using a supported Group VIII metal catalyst by employing a catalyst having a significantly increased total surface area.Type: ApplicationFiled: May 30, 2002Publication date: December 4, 2003Inventor: Mark P. Kaminsky
-
Patent number: 6589417Abstract: Used oil is treated in a reactor to remove contaminants. The reactor comprises a rotating vessel housed within a heating chamber. The inside of the vessel is indirectly heated by conduction through the vessel walls. The vessel contains a permanently resident charge of non-ablating, coarse granular solids. Within the vessel, the oil is vaporized and pyrolyzed, producing a hydrocarbon vapor. Coke is formed as a byproduct. Contaminants, such as metals and halides become associated with the coke. The coarse granular solids scour and comminute the coke to form fine solids. The fine solids are separated from the coarse solids and are removed from the vessel. The hydrocarbon vapors are separated from any fine solids and are routed to a vapor condensation system for producing a substantially contaminant-free product oil. The contaminant-rich solids are collected for disposal.Type: GrantFiled: May 22, 2001Date of Patent: July 8, 2003Assignee: Alberta Oil Sands Tech and Research AuthorityInventors: William Taciuk, Steve Odut, Gordon Taciuk, Charlie Wheeler
-
Patent number: 6579442Abstract: Methods and compositions for inhibiting the polymerization of vinyl monomers are disclosed. Combinations of nitroxyl compounds and aliphatic amines are effective at inhibiting the polymerization of vinyl monomers under both processing and storage conditions.Type: GrantFiled: May 22, 2001Date of Patent: June 17, 2003Assignee: GE Betz, Inc.Inventor: Sherif Eldin
-
Patent number: 6544409Abstract: A process for the catalytic oxidation of sulfur and nitrogen contaminants as well as unsaturated compounds present in a hydrocarbon fossil oil medium is described, the process comprising effecting the oxidation in the presence of at least one peroxide, at least one acid and a pulverized raw iron oxide. The process shows an improved oxidation power towards the contaminants typically present in a fossil oil medium, this deriving from the combination of the peroxyacid and the hydroxyl radical generated in the reaction medium due to the presence of an iron oxyhydroxide such as a limonite clay, which bears a particular affinity for the oil medium. The process finds use in various applications, from a feedstock for refining until the preparation of deeply desulfurized and deeply denitrified products.Type: GrantFiled: May 16, 2001Date of Patent: April 8, 2003Assignee: Petroleo Brasileiro S.A. - PetrobrasInventor: Wladmir Ferraz De Souza
-
Publication number: 20030010676Abstract: Methods and compositions for inhibiting the polymerization of vinyl monomers are disclosed. Combinations of nitroxyl compounds and aliphatic amines are effective at inhibiting the polymerization of vinyl monomers under both processing and storage conditions.Type: ApplicationFiled: May 22, 2001Publication date: January 16, 2003Inventor: Sherif Eldin
-
Publication number: 20020189975Abstract: A process for the catalytic oxidation of sulfur and nitrogen contaminants as well as unsaturated compounds present in a hydrocarbon fossil oil medium is described, the process comprising effecting the oxidation in the presence of at least one peroxide, at least one acid and a pulverized raw iron oxide. The process shows an improved oxidation power towards the contaminants typically present in a fossil oil medium, this deriving from the combination of the peroxy-acid and the hydroxyl radical generated in the reaction medium due to the presence of an iron oxyhydroxide such as a limonite clay, which bears a particular affinity for the oil medium. The process finds use in various applications, from a feedstock for refining until the preparation of deeply desulfurized and deeply denitrified products.Type: ApplicationFiled: May 16, 2001Publication date: December 19, 2002Applicant: PETROLEO BRASILEIRO S.A. - PETROBRASInventor: Wladmir Ferraz De Souza
-
Publication number: 20020157991Abstract: The present invention is a method to disaggregate asphaltenes in petroleum oils and oil mixtures by mild heating. The presence of asphaltenes is determined by small angle neutron scattering.Type: ApplicationFiled: March 27, 2001Publication date: October 31, 2002Inventors: Thomas G. Mason, Min Yue Lin
-
Patent number: 6217750Abstract: The invention concerns a process for purifying naphthalene. The process comprises selective hydrotreatment corresponding to hydrodesulphuration and/or hydrodenitrogenation and/or hydrodehydroxylation and/or hydrogenation of olefins while limiting naphthalene hydrogenation. The catalyst used comprises a matrix, at least one group VIII metal, at least one group VI metal and optionally phosphorous. It has a specific surface area of at most 220 m2/g, a pore volume of 0.35-0.7 ml/g and an average pore diameter of over 10 nm. The process is carried out at 150-325° C. at a pressure of 0.1-0.9 MPa, with an HSV of 0.05-10 h−1, and a H2/naphthalene ratio of 0.1-1.3 mole/mole. The effluent, freed of H2S, NH3 and water, undergoes a naphthalene separation process by distillation or, as is preferable, by crystallisation. Further, recycling the separated tetralin to the hydrotreatment step can substantially increase the naphthalene yield.Type: GrantFiled: January 16, 1998Date of Patent: April 17, 2001Assignee: Institut Francais du PetroleInventors: Samuel Mignard, Guenaël Drouglazet, Slavik Kasztelan, Jean Cosyns, Michel Bloch, René Genin
-
Patent number: 6207043Abstract: Low-sulfur aliphatic compounds are obtained from olefin-rich starting materials contaminated with organic sulfur compounds.Type: GrantFiled: November 23, 1998Date of Patent: March 27, 2001Assignee: BASF AktiengesellschaftInventors: Maximilian Vicari, Ekkehard Schwab, Marc Walter, Siegmar Maassen
-
Patent number: 5968346Abstract: A hydroprocessing process includes two hydroprocessing reaction stages, both of which produce a liquid and a vapor effluent, and a liquid-vapor contacting stage. The first stage vapor effluent contains impurities, such as heteroatom compounds, which are removed from the vapor by contact with processed liquid effluent derived from one or both reaction stages and, optionally, also liquid recovered from processed vapor. The first and contact stage liquid effluents are passed into the second stage to finish the hydoprocessing. The contact and second stage vapor effluents are cooled to recover additional hydroprocessed product liquid.Type: GrantFiled: September 16, 1998Date of Patent: October 19, 1999Assignee: Exxon Research and Engineering Co.Inventors: Henry Jung, Ramesh Gupta, Edward S. Ellis, William E. Lewis
-
Patent number: 5689033Abstract: A process is directed to the removal of impurities such as sulfur compounds, oxygenates, and/or olefins from a light paraffin hydrocarbon feedstock such as a C.sub.4 -C.sub.6 fraction, which may be used subsequently in an isomerization process in an integrated complex for the production of ethers such as MTBE and TAME. The hydrocarbon feedstream is passed to a removal zone wherein the hydrocarbon feedstream is contacted with a selective solvent for the removal of the impurities comprising at least one of sulfur compounds, oxygenates and olefins to provide a rich solvent stream and a treated hydrocarbon stream. The rich solvent comprising the trace impurities is contacted with a stripping medium stream to regenerate the selective solvent in a stripping zone. The removal zone may be a liquid-liquid extraction zone or a gas absorption zone.Type: GrantFiled: May 2, 1996Date of Patent: November 18, 1997Assignee: UOPInventors: Paulino Forte, Stanley J. Frey
-
Patent number: 5672793Abstract: Hydrocarbon-containing fluid compositions are provided comprising at least one hydrocarbon fluid, at least one heteroaromatic, and at least one hydrazine additive. The resulting composition has reduced temporal formation of colored materials and/or gummy deposits. Additionally, antioxidant additives are combined with the above composition and provide a further reduction in the formation of colored materials and/or gummy deposits.Type: GrantFiled: June 7, 1995Date of Patent: September 30, 1997Assignee: Phillips Petroleum CompanyInventors: Joseph E. Bares, Byron G. Johnson, Frederick J. Cornforth
-
Patent number: 5658453Abstract: A process combination is disclosed to selectively upgrade naphtha in a manner to obtain an aromatics-rich, low-olefin product from the combination. Preferably the naphtha is subjected to aromatization to obtain an aromatics concentrate which is upgraded by hydrogenation of olefins in the aromatics-rich stream. Olefin saturation is effected following separation of the major portion of hydrogen from the aromatics concentrate and before fractionation/stabilization for removal of light ends, with concomitant low saturation of aromatics and with removal of light ends in a fractionator which would be associated with the aromatization in any case.Type: GrantFiled: May 30, 1995Date of Patent: August 19, 1997Assignee: UOPInventors: Michael B. Russ, Aaron P. Kelly, John Y. G. Park
-
Patent number: 5470457Abstract: Hydrocarbon-containing fluid compositions are provided comprising at least one hydrocarbon fluid, at least one heteroaromatic, and at least one hydrazine additive. The resulting composition has reduced temporal formation of colored materials and/or gummy deposits. Additionally, antioxidant additives are combined with the above composition and provide a further reduction in the formation of colored materials and/or gummy deposits.Type: GrantFiled: June 17, 1994Date of Patent: November 28, 1995Assignee: Phillips Petroleum CompanyInventors: Joseph E. Bares, Byron G. Johnson, Frederick J. Cornforth
-
Patent number: 5318697Abstract: This invention relates to a process for upgrading a hydrocarbonaceous material to a product having a lower boiling point than the initial boiling point of said hydrocarbonaceous material and/or a higher boiling point than the final boiling point of said hydrocarbonaceous material, the process comprising heating a feed composition comprising said hydrocarbonaceous material in an enclosed space in the absence of externally supplied water or hydrogen at a temperature in the range of about 750.degree. F. to about 1300.degree. F. and a pressure sufficient to maintain the specific gravity of the contents of said enclosed space in the range of about 0.05 to about 1.5 for an effective period of time to yield said product, said feed composition being characterized by the absence of aromatic compounds with boiling points at atmospheric pressure below about 350.degree. F.Type: GrantFiled: September 18, 1992Date of Patent: June 7, 1994Assignee: The Standard Oil CompanyInventors: Stephen C. Paspek, Jeffrey B. Hauser, Christopher P. Eppig, Harry A. Adams
-
Patent number: 5154817Abstract: Gum and sediment formation in liquid hydrocarbon mediums are inhibited by adding to the medium a branched or straight chain C.sub.1 -C.sub.8 aminoalcohol. The invention is particularly well-suited for use in hydrodesulfurizer processes wherein the hydrocarbon medium is typically a naphtha, diesel, kerosene, light gas and or residual fuel charge and the charge or medium is subjected to high temperature and pressure treatment in the presence of a catalyst. The invention also shows particular advantage in distillate fuels, such as in blended diesel fuels, both before and during heat treatment processing thereof.Type: GrantFiled: May 24, 1990Date of Patent: October 13, 1992Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
-
Patent number: 4941968Abstract: Gum and sediment formation in liquid hydrocarbon mediums are inhibited by adding to the medium an alkyl 1,2-dihydroquinoline compound, dimer, trimer or polymer thereof. The invention is particularly well-suited for use in hydrodesulfurizer processes wherein the hydrocarbon medium is typically a naphtha, diesel, kerosene, light gas and or residual fuel charge and the charge or medium is subjected to high temperature and pressure treatment in the presence of a catalyst.Type: GrantFiled: July 28, 1989Date of Patent: July 17, 1990Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
-
Patent number: 4912873Abstract: Treatment of diesel or jet fuel with a non-ionic, macroreticular, cross-linked, acrylic aliphatic ester resin reduces polar impurities and (diesel) color.Type: GrantFiled: February 17, 1989Date of Patent: April 3, 1990Assignee: Shell Oil CompanyInventors: Zaida Diaz, James H. Miller
-
Patent number: 4900427Abstract: Fouling of heat exchangers in chemical processing or oil refining systems is inhibited by incorporating into a petroleum derived stock an effective antifouling amount of a mixture of(a) a condensation product of an alkylphenol, an aldehyde, and an amine; and(b) a diaminomethane.Type: GrantFiled: July 21, 1989Date of Patent: February 13, 1990Assignee: Petrolite CorporationInventors: Jerry J. Weers, Thomas J. Falkler, George G. Duggan, Robert J. Garrecht
-
Patent number: 4894139Abstract: Certain Mannich reaction products formed from the reaction of an alkyl substituted catechol, a polyamine, and an aldehyde are used to deactivate copper metal species contained in hydrocarbon fluids. Left untreated, such copper species lead to decomposition resulting in the formation of gummy, polymer masses in the hydrocarbon liquid.Type: GrantFiled: May 24, 1988Date of Patent: January 16, 1990Assignee: Betz Laboratories, Inc.Inventors: Paul V. Roling, Dwight K. Reid, Joseph H. Y. Niu
-
Patent number: 4840720Abstract: This invention relates to processes for inhibiting the degradation, particulate and gum formation of distillate fuel oils prior to or during processing which comprises adding to the distillate fuel oil an effective inhibiting amount of a mixture of (a) a phosphite compound having the formula ##STR1## wherein R, R' and R" are the same or different and are alkyl, aryl, alkaryl or aralkyl groups, and (b) an effective amount of hydroxylamine, having the formula. ##STR2## wherein R.sup.III and R.sup.IV are the same or different and are hydrogen, alkyl, aryl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:10 to about 10:1.Type: GrantFiled: September 2, 1988Date of Patent: June 20, 1989Assignee: Betz Laboratories, Inc.Inventor: Dwight K. Reid
-
Patent number: 4810354Abstract: Alkoxylated Mannich product compositions and methods of use of same as process antifoulants are disclosed. The alkoxylated Mannich products deactivate metals and inhibit oxygen promoted polymerization in hydrocarbons and petrochemicals.Type: GrantFiled: October 31, 1986Date of Patent: March 7, 1989Assignee: Betz Laboratories, Inc.Inventors: Paul V. Roling, Joseph H. Y. Niu, Dwight K. Reid