Inorganic Acid Patents (Class 208/223)
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Patent number: 11124709Abstract: A system for liquid hydrocarbon desulfurization having at least one reaction subsystem including at least one high intensity mixer and a stripping station. Multiple reaction subsystems can be utilized. A method is likewise disclosed for liquid hydrocarbon desulfurization.Type: GrantFiled: June 26, 2018Date of Patent: September 21, 2021Assignee: Alternative Petroleum Technologies Holdings Corp.Inventors: Jack Lawrence Waldron, Kylen J. Smith
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Patent number: 9845442Abstract: A hydrodynamic cavitation method for degumming triglyceride oil is used to increase oil yield and reduce impurities. The residence time of the oil for degumming in the cavitation field is reduced to enhance removal of impurities such as phosphorus without prolonged exposure of the oil to cavitation conditions. The mass transfer of impurities from an oil phase to non-oil components or water is carried out in a non-cavitational, mass transfer reactor positioned downstream of a hydrodynamic cavitation device. A separation step can be used to remove the phosphatides and other impurities from the treated oil to form a purified oil product.Type: GrantFiled: January 6, 2017Date of Patent: December 19, 2017Assignee: ARISDYNE SYSTEMS, INC.Inventors: Oleg Kozyuk, Peter Reimers
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Patent number: 9592495Abstract: An ammonia synthesis catalyst synthesizing ammonia from nitrogen in a presence of moisture is provided. The ammonia synthesis catalysis includes a catalyst particle including an inorganic material that has a photocatalytic function and an inorganic acid. The catalyst particle is preferably an n-type semiconductor and includes oxide material including at least titanium preferably. The inorganic acid preferably corresponds to at least one of perchloric acid, hydrochloric acid, sulfuric acid, and phosphoric acid.Type: GrantFiled: December 17, 2014Date of Patent: March 14, 2017Assignee: DENSO CORPORATIONInventors: Masaki Yoshinaga, Hiroaki Yotou, Goh Iijima, Yoshimasa Hijikata
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Patent number: 8894843Abstract: A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants is disclosed. The method includes contacting the heteroatom-containing hydrocarbon feed with an oxidant and an immiscible acid to oxidize the heteroatoms, contacting the oxidized- heteroatom-containing hydrocarbon feed with caustic and a selectivity promoter, and removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed. The oxidant may be used in the presence of a catalyst.Type: GrantFiled: June 11, 2012Date of Patent: November 25, 2014Assignee: Auterra, Inc.Inventors: Jonathan P. Rankin, Jennifer L. Vreeland, Kyle E. Litz, Tracey M. Jordan, Mark N. Rossetti, Eric H. Burnett, Trent A. McCaskill
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Publication number: 20140299512Abstract: Processes are disclosed for reducing the sulphur content of a hydrocarbon material containing sulphur compounds.Type: ApplicationFiled: March 17, 2014Publication date: October 9, 2014Applicant: Ultraclean Fuel Pty Ltd.Inventors: Gordon John Gargano, Marc E. Halpern
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Publication number: 20120285866Abstract: A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants is disclosed. The method includes contacting the heteroatom-containing hydrocarbon feed with an oxidant to oxidize the heteroatoms, contacting the oxidized-heteroatom-containing hydrocarbon feed with caustic and a selectivity promoter, and removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed. The oxidant may be used in the presence of a catalyst.Type: ApplicationFiled: July 27, 2012Publication date: November 15, 2012Inventors: Kyle E. Litz, Jennifer L. Vreeland, Jonathan P. Rankin, Mark N. Rossetti, Tracey M. Jordan, Trent A. McCaskill
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Patent number: 8298404Abstract: A reaction system and method for removing heteroatoms from oxidized-heteroatom-containing hydrocarbon streams and products derived therefrom are disclosed. An oxidized-heteroatom-containing hydrocarbon feed is reacted in a reaction system thereby forming non-ionic hydrocarbon products. The products derived therefrom are useful as transportation fuels, lubricants, refinery intermediates, or refinery feeds.Type: GrantFiled: September 22, 2010Date of Patent: October 30, 2012Assignee: Auterra, Inc.Inventors: Kyle E. Litz, Jennifer L. Vreeland, Jonathan P. Rankin, Thomas W. DeLancey, Timothy A. Thompson
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Patent number: 8241490Abstract: A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants is disclosed. The method includes contacting the heteroatom-containing hydrocarbon feed with an oxidant to oxidize the heteroatoms, contacting the oxidized-heteroatom-containing hydrocarbon feed with caustic and a selectivity promoter, and removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed. The oxidant may be used in the presence of a catalyst.Type: GrantFiled: October 14, 2010Date of Patent: August 14, 2012Assignee: Auterra, Inc.Inventors: Kyle E. Litz, Jennifer L. Vreeland, Jonathan P. Rankin, Mark N. Rossetti, Tracey M. Jordan
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Patent number: 8197671Abstract: A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants is disclosed. The method includes contacting the heteroatom-containing hydrocarbon feed with an oxidant and an immiscible acid to oxidize the heteroatoms, contacting the oxidized-heteroatom-containing hydrocarbon feed with caustic and a selectivity promoter, and removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed. The oxidant may be used in the presence of a catalyst.Type: GrantFiled: December 23, 2010Date of Patent: June 12, 2012Assignee: Auterra, Inc.Inventors: Jonathan P. Rankin, Jennifer L. Vreeland, Kyle E. Litz, Tracey M. Jordan, Mark N. Rossetti, Eric H. Burnett
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Publication number: 20120091040Abstract: A method for desulfurization of heavy fuel oil using ferrate compounds by mixing fuel oil containing sulfur compounds with a solvent and forming a fuel oil solvent mixture, dissolving the sulfur compounds present in the fuel oil solvent mixture. Adding a liquid ferrate solution to the fuel oil solvent mixture produces oxidized sulfur compounds, in solution. An absorbing agent is added to remove thed oxidized sulfur compounds from said solution.Type: ApplicationFiled: October 19, 2011Publication date: April 19, 2012Applicant: Florida Institute of Technology, Attention Office for Research and Technology TransferInventors: Virender K. Sharma, Abdullah Al-Abduly
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Publication number: 20110179698Abstract: The present invention relates to a process for producing clean petroleum fuel by reducing sulfur content, and raising the Cetane Number to a value above 50, in a process that may be carried out at one atmospheric pressure.Type: ApplicationFiled: January 2, 2011Publication date: July 28, 2011Inventor: Hassan Agha
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Patent number: 7947166Abstract: The present invention relates to a method for treating a feed corresponding to a pyrolysis gasoline, comprising: a) at least one stage of selective hydrogenation of the feed, referred to as HD1, b) fractionating in one or more distillation columns the effluent from stage a) in order to produce at least one light C5 cut, an intermediate C6 or C6-C7 or C6-C8 cut intended for aromatics production, a heavy C7+ or C8+ or C9+ cut intended for gasoline production, c) at least one stage of hydrodesulfurization and deep hydrogenation of the intermediate cut, referred to as HD2, d) at least one stage of alkylation of the heavy C7+, C8+ or C9+ cut consisting of a treatment on an acid catalyst allowing weighting of the sulfur compounds, e) at least one stage of distillation of the effluent from stage d), intended to produce a light fraction that can be directly used as a low-sulfur gasoline base, and a heavy C11+ or C12+ fraction rich in sulfur compounds, used as middle distillate or fuel oil.Type: GrantFiled: March 13, 2008Date of Patent: May 24, 2011Assignee: IFP Energies NouvellesInventors: Florent Picard, Quentin Debuisschert, Annick Pucci
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Patent number: 7892418Abstract: The present invention relates to a process for reducing sulfur content in petroleum fuel, such as diesel fuel, and raising the Cetane Number to a value above 50.Type: GrantFiled: May 26, 2009Date of Patent: February 22, 2011Assignee: Oil Tech SARLInventor: Hassan Agha
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Patent number: 7811538Abstract: The method allows to remove mercaptans contained in a gaseous feed comprising hydrocarbons by carrying out the following stages: a) contacting, in a reactor R1, gaseous feed 1 with a liquid stream 13 comprising olefins, in the presence of a first acid catalyst so that the mercaptans react with the olefins so as to form sulfides, b) discharging an effluent 3 from reactor R1 and separating the effluent into a gas phase and a liquid phase so as to obtain a mercaptan-depleted treated gas 4 and a sulfide-laden liquid, c) separating the sulfide-laden liquid into a first fraction 6 and a second fraction 5, the volume flow rate of first fraction 6 being at least three times higher than the volume flow rate of second fraction 5, d) recycling first fraction 6 to stage a) as a first portion of said liquid stream to be fed into said reactor R1, e) regenerating second fraction 5 by cracking so as to obtain a sulfide-depleted second fraction 2 that is recycled to stage a) as a second portion of said liquid stream.Type: GrantFiled: March 28, 2008Date of Patent: October 12, 2010Assignee: Institut Francais du PetroleInventors: Renaud Cadours, Eric Lemaire, Julia Magne-Drisch
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Publication number: 20100155303Abstract: Disclosed is a method for desulfurization of a hydrocarbon oil (e.g., kerosene which is a raw fuel for a fuel cell) which can effectively remove benzothiophenes and dibenzothiophenes contained in the hydrocarbon oil under mild conditions to produce a desulfurized hydrocarbon oil having a significantly low sulfur content. The method comprises the step of desulfurizing the hydrocarbon oil such as kerosene containing benzothiophenes and dibenzothiophenes with the combination of a solid acid-type desulfurizing agent and an active carbon-type desulfurizing agent. This method can provide a hydrocarbon oil having a significantly low sulfur content. By using the hydrocarbon oil, the operation or maintenance of a fuel cell system can be made easily, a fuel cell itself can be miniaturized in size, and the lifetime of a desulfurizing agent in a desulfurization apparatus equipped in a fuel cell system can be prolonged.Type: ApplicationFiled: July 25, 2006Publication date: June 24, 2010Applicant: JAPAN ENERGY CORPORATIONInventors: Yasuhiro Toida, Toru Saito
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Publication number: 20100140142Abstract: A crude oil which contains at least 0.1 wt % unstable sulfur compounds is treated in a reaction zone at low temperature to convert at least 50 wt % of the unstable sulfur compounds contained therein. The reaction and removal of sulfur from the crude may be facilitated by contacting the crude oil with a catalytic material in the presence of a stripping fluid.Type: ApplicationFiled: December 10, 2008Publication date: June 10, 2010Inventors: Huping Luo, Zhen Zhon, Lin Li, Alice He, Daniel Chinn, Graham Forder, Lyman Young, Shabbir Husain, William Schinski
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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
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Publication number: 20090288982Abstract: The present invention relates to a process for reducing sulfur content in petroleum fuel, such as diesel fuel, and raising the Cetane Number to a value above 50.Type: ApplicationFiled: May 26, 2009Publication date: November 26, 2009Inventor: Hassan Agha
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Patent number: 7252756Abstract: A process is disclosed for the production of refinery transportation fuel or components for refinery blending of transportation fuels having a reduced amount of sulfur and/or nitrogen-containing impurities. The process involves contacting a hydrocarbon feedstock containing the above impurities with an immiscible phase containing hydrogen peroxide and acetic acid in an oxidation zone to selectively oxidize the impurities. After a gravity phase separation, the hydrocarbon phase containing any remaining oxidized impurities, is passed to an extraction zone wherein aqueous acetic acid is used to extract a portion of any remaining oxidized impurities. A hydrocarbon stream having reduced impurities can then be recovered. The acetic acid phase effluents from the oxidation and the extraction zones can then be passed to a common separation zone for recovery of the acetic acid and for optional recycle back to the oxidation and extraction zones.Type: GrantFiled: December 18, 2002Date of Patent: August 7, 2007Assignee: BP Corporation North America Inc.Inventors: William H. Gong, Larry W. Kruse, George A. Huff, Michael Muskett
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Patent number: 7192565Abstract: The gaseous feed flowing in through line 1 is contacted in contacting zone ZA with a liquid solvent flowing in through line 2. The solvent comprises between 0.001% and 100% by weight of a liquid olefin. Contacting in zone ZA is carried out in the presence of an acid catalyst. The purified gaseous feed is discharged from zone ZA through line 3. The sulfide-laden solvent is discharged through line 4, then regenerated in unit RE. The regenerated solvent is recycled through lines 7 and 2 to zone ZA.Type: GrantFiled: August 2, 2005Date of Patent: March 20, 2007Assignee: Institut Francais du PetroleInventors: Patrick Briot, Renaud Cadours, Sophie Drozdz, Fabrice Lecomte
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Patent number: 7019188Abstract: The present invention relates to the separation of olefins, diolefins and lower aromatics from mixed streams of hydrocarbons using ionic liquids in the absence of metal compounds. The present invention eliminates the metal complexes conventionally used in such separation and thus reduces the complexity of the process.Type: GrantFiled: June 14, 2002Date of Patent: March 28, 2006Assignee: Nova Chemicals (International) S.A.Inventors: Ronald Scott Smith, Patricio S Herrera, Sean Reynolds
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Patent number: 6849774Abstract: Methods for separating di-olefins from mono-olefins, and olefins from non-olefins such as paraffins, oxygenates and aromatics; are provided. The methods use metal salts which complex both mono-olefins and di-olefins, but which selectively complex di-olefins in the presence of mono-olefins. The metal salts are dissolved or suspended in ionic liquids, which tend to have virtually no vapor pressure. Preferred salts are Group IB salts, more preferably silver and copper salts. A preferred silver salt is silver tetrafluoroborate. A preferred copper salt is silver CuOTf. Preferred ionic liquids are those which form stable solutions, suspensions or dispersions of the metal salts, which do not dissolve unwanted non-olefins, and which do not isomerize the mono- or di-olefins. The equivalents of the metal salt can be adjusted so that di-olefins are selectively adsorbed from mixtures of mono- and di-olefins. Alternatively, both mono- and di-olefins can be adsorbed, and the mono-olefins selectively desorbed.Type: GrantFiled: December 31, 2001Date of Patent: February 1, 2005Assignee: Chevron U.S.A. Inc.Inventors: Laura C. Boudreau, Michael S. Driver, Curt L. Munson, William L. Schinski
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Patent number: 6638419Abstract: A method for obtaining oil products such as diesel fuel with improved quality, from a gas oil fraction containing organosulphur compounds such as dibenzenethiophenes and/or their derivatives, with initial and final boiling points generally ranging between about 170 and 480° C. The method includes at least two steps which consist in: (a) liquid-liquid extraction wherein the diesel fuel fraction is contacted with a solvent so as to obtain a gas oil-type raffinate with low content of sulphur and aromatic compounds and an extract rich in solvent and with high content of sulphur and aromatic compounds; (b) oxidation of the extract sulphur compounds so as to obtain, after separation, a heavy gas oil-type hydrocarbon effluent with low sulphur content, and a residue comprising oxidased organosulphur compounds. The invention also concerns oil products obtained by said method which can be used either for the formation of fuel for internal combustion engine with compression ignition (of the diesel type) or as fuel.Type: GrantFiled: January 10, 2002Date of Patent: October 28, 2003Assignee: Total Raffinage Distribution S.A.Inventors: Pedro Da Silva, Raphaël Le Gall
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Patent number: 6596914Abstract: A multi-step process for desulfurizing liquid petroleum fuels that also removes nitrogen-containing compounds and aromatics. The process steps are: thiophene extraction; thiophene oxidation; thiophene-oxide and -dioxide extraction; raffinate solvent recovery and polishing; extract solvent recovery; and recycle-solvent purification. The thiophene oxidation is accomplished with hydrogen peroxide and the extraction solvent is acetic acid in combination with secondary solvents. The operating conditions in the process are relatively mild at near ambient pressure and less than 145° C. throughout the process, and the only chemical consumed in the process is hydrogen peroxide. The process design can be modified to accommodate a variety of liquid hydrocarbon feeds.Type: GrantFiled: August 25, 2001Date of Patent: July 22, 2003Inventors: Walter Gore, Steve Bonde, Geoffrey E. Dolbear, Ebbe R. Skov
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Patent number: 6406616Abstract: A process for desulfurizing hydrocarbons such as gasoline and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur without affecting the octane rating is described. The sulfur containing hydrocarbon is contacted at slightly elevated temperatures with an oxidizing/extracting solution of formic acid, a small amount of hydrogen peroxide, and no more than about 25 wt % water.Type: GrantFiled: September 12, 2001Date of Patent: June 18, 2002Assignee: Unipure CorporationInventors: Alkis S. Rappas, Vincent P. Nero, Stephen J. DeCanio
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Patent number: 6402940Abstract: A process for desulfurizing fuels such as diesel oil and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur is described. The sulfur containing fuel is contacted at slightly elevated temperatures with an oxidizing/extracting solution of formic acid, a small amount of hydrogen peroxide, and no more than about 25 wt % water. A removal process for separating substituted dibenzothiophene oxidation products from tile fuel is also described.Type: GrantFiled: September 1, 2000Date of Patent: June 11, 2002Assignee: Unipure CorporationInventor: Alkis S. Rappas
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Publication number: 20020029997Abstract: A process for desulfurizing hydrocarbons such as gasoline and similar petroleum products to reduce the sulfur content to a range of from about 2 to 15 ppm sulfur without affecting the octane rating is described. The sulfur containing hydrocarbon is contacted at slightly elevated temperatures with an oxidizing/extracting solution of formic acid, a small amount of hydrogen peroxide, and no more than about 25 wt % water.Type: ApplicationFiled: September 12, 2001Publication date: March 14, 2002Applicant: UniPure CorporationInventors: Alkis S. Rappas, Vincent P. Nero, Stephen J. DeCanio
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Patent number: 6339182Abstract: Methods for separating olefins from non-olefins, such as parafins, including cycloparaffins, oxygenates and aromatics, are provided. The methods use metal salts to complex olefins, allowing the non-olefins to be separated by a variety of methods, including decantation and distillation. The metal salts are dissolved in ionic liquids, which tend to have virtually no vapor pressure, and which poorly solubilize the non-olefins. Accordingly, the non-olefins phase separate well, and can be distilled without carrying over any of the ionic liquid into the distillate. Preferred salts are Group IB salts, more preferably silver salts. A preferred silver salt is silver tetrafluoroborate. Preferred ionic liquids are those which form stable solutions or dispersions of the metal salts, and which do not dissolve the non-olefins. Further, if the olefins are subject to isomerization, the ionic liquid is preferably relatively non-acidic.Type: GrantFiled: December 12, 2000Date of Patent: January 15, 2002Assignee: Chevron U.S.A. Inc.Inventors: Curtis L. Munson, Laura C. Boudreau, Michael S. Driver, William L. Schinski
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Patent number: 6303843Abstract: A process for removing sulfone from a liquid hydrocarbon containing a concentration of sulfone by mixing a liquid acid therewith and thereafter separating the resulting admixture into an acid phase and a hydrocarbon phase. The hydrocarbon phase has a concentration of sulfone less than such concentration in the liquid hydrocarbon.Type: GrantFiled: September 18, 1995Date of Patent: October 16, 2001Assignee: Phillips Petroleum CompanyInventors: Richard L. Anderson, Bruce B. Randolph
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Patent number: 5346614Abstract: A method and system for removing hydrogen sulfide from a continuous aqueous phase-containing fluid without forming a sulfur sludge. Oil is either initially present in the fluid or added thereto.Type: GrantFiled: November 10, 1992Date of Patent: September 13, 1994Assignee: Union Oil Company of CaliforniaInventors: Christohper R. Culver, Clifford D. Juengst
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Patent number: 5288681Abstract: A catalyst prepared by the steps which comprise: (a) adding to an asphaltene-containing hydrocarbonaceous oil charge stock a metal compound, a heteropoly acid and water; (b) converting the metal compound and heteropoly acid within the charge stock by heating the oil to a temperature from about 120.degree. F. (43.degree. C.) to about 500.degree. F. (260.degree. C.) to produce at least one organometallic compound within the charge stock; and (c) converting the organometallic compound within the charge stock under hydroconversion conditions to produce the catalyst.Type: GrantFiled: October 16, 1992Date of Patent: February 22, 1994Assignee: UOPInventor: John G. Gatsis
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Patent number: 5225159Abstract: A method is provided for treating a sewage sludge-derived oil having a particular chemical composition, to reduce its odor. The method includes the first step of distilling the sewage sludge-derived oil to 150.degree. C. to remove water and volatile organic components, and then the essential step of circulating a gas consisting essentially of carbon dioxide gas therethrough.Type: GrantFiled: December 13, 1991Date of Patent: July 6, 1993Inventors: Henry Sawatzky, Terrance Giddings, Brian Farnand
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Patent number: 5087350Abstract: A process for removing S and Fe and to reclaim V, Ni and Co from coal or oil and their derivatives or from minerals. The process is based upon an oxidative extraction performed with hypochlorous acid (HClO) whose oxidizing power is generated and regulated "in situ". The process is particularly applicable to the recovery of V from residual flexi-coke and to the recovery of Ni from coal.Type: GrantFiled: December 19, 1990Date of Patent: February 11, 1992Assignee: Laboratorios Paris, C.A.Inventor: Lucinda C. Paris-Marcano
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Patent number: 5034118Abstract: Hydrogen sulfide can be conveniently removed from streams containing up to about 1,000 ppm of H.sub.2 S by reacting the latter with an olefin using a bed of an acidic solid catalyst in a non-oxidative process for the removal of hydrogen sulfide. The reaction can be effected under relatively mild conditions and is very selective for the removal of hydrogen sulfide without being attended by other unwanted reactions such as oligomerization, disproportionation, and skeletal rearrangement. Levels of hydrogen sulfide in the treated product of no more than about 5 ppm can be readily attained using a broad variety of acidic solid catalysts and unsaturated hydrocarbons, especially olefins.Type: GrantFiled: September 29, 1989Date of Patent: July 23, 1991Assignee: UOPInventors: Jeffery C. Bricker, Tamotsu Imai
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Patent number: 5017280Abstract: A process for removing S and Fe and to reclaim V, Ni and Co from coal or oil and their derivatives or from minerals. The process is based upon an oxidative extraction performed with hypochlorous acid (HC10) whose oxidizing power is generated and regulated "in situ". The process is particularly applicable to the recovery of V from residual flexi-coke and to the recovery of Ni from coal.Type: GrantFiled: May 8, 1990Date of Patent: May 21, 1991Assignee: Laboratorios Paris, C.A.Inventor: Lucinda C. Paris-Marcano
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Patent number: 4746420Abstract: A process for upgrading diesel oil comprising the steps of:(1) reacting the diesel oil with a nitrogenous treating agent;(2) contacting the diesel oil from step (1) above with(a) a primary solvent selected from the group consisting of organic solvents having a dipole moment of about 1.Type: GrantFiled: February 24, 1986Date of Patent: May 24, 1988Assignee: REI Technologies, Inc.Inventors: Saeed T. Darian, Sayed-Hamid Arabshahi
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Patent number: 4711713Abstract: A process for enhancement of the cetane number of a diesel fuel which in one embodiment comprises:(1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, to about 10 weight percent or less of the diesel oil feed;(2) separating unreacted nitrogenous treating agent from the diesel oil of step (1);(3) treating the diesel oil of step (2) with an inorganic alkali to produce a treated diesel oil; and(4) blending the treated diesel oil of step (3) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is(a) about 300 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or(b) about 450 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.Type: GrantFiled: February 9, 1987Date of Patent: December 8, 1987Assignee: REI Technologies, Inc.Inventors: Hossein Zarrineghbal, Charles W. Quinlan
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Patent number: 4643820Abstract: A process for enhancement of the cetane number of a diesel fuel which in one embodiment comprises:(1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, to about 10 weight percent or less of the diesel oil feed;(2) removing unreacted nitrogenous treating agent from the diesel oil of step (1) to produce a treated diesel oil, and;(3) blending the treated diesel oil of step (2) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is(a) about 300 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or(b) about 450 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.Type: GrantFiled: February 24, 1986Date of Patent: February 17, 1987Assignee: OxiProcessingInventors: Hossein Zarrineghbal, James R. Kittrell, Saeed T. Darian
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Patent number: 4606812Abstract: A process for hydrotreating carbonaceous materials is disclosed. The carbonaceous material is contacted with steam and with empirical hydrates of alkali metal hydrosulfides, monosulfides, or polysulfides. The process hydrocracks, hydrogenates, denitrogenates, demetallizes, and desulfurizes. In a preferred embodiment, hydrogen sulfide is co-fed to the reaction zone.Type: GrantFiled: November 7, 1983Date of Patent: August 19, 1986Assignee: Chemroll Enterprises, Inc.Inventor: Rollan Swanson
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Patent number: 4518489Abstract: Basic nitrogen-containing compounds are removed from mineral oil, such as shale oil, by extraction with an immiscible aqueous phase containing an acid gas such as carbon dioxide. Effectiveness of the separation is proportional to the partial pressure of the gas. In one embodiment, a waste gas stream is used as the CO.sub.2 -containing gas.Type: GrantFiled: September 22, 1982Date of Patent: May 21, 1985Assignee: Phillips Petroleum CompanyInventor: Donald O. Hitzman
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Patent number: 3957628Abstract: A process in which organic sulfur, nitrogen and oxygen compounds are essentially quantitatively removed from hydrocarbon feedstocks by contacting said feedstocks with liquid hydrogen fluoride in the presence of hydrogen. Preferred feedstocks are those boiling in the range of from about -185.degree.C to about 345.degree.C wherein the sulfur content ranges from about 0.001 to about 10 wt. %, preferably 0.001 to about 3 wt. %.Type: GrantFiled: December 30, 1974Date of Patent: May 18, 1976Assignee: Exxon Research and Engineering CompanyInventors: Michael Siskin, Joseph J. Porcelli
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HF acid treating the paraffin feed stream to an integrated paraffin isomerization-alkylation process
Patent number: 3931352Abstract: The normal paraffin feed stream to an integrated paraffin isomerization-HF acid-catalyzed alkylation process is treated for the removal of catalyst deactivating sulfur and nitrogen compounds and water by contacting the feed stream with liquid hydrofluoric acid. The treated feed stream is separated from the acid by gravity settling, charged to an alkylate fractionator, and passed through the isomerization process to form an isomerate which is returned to the alkylate fractionator and becomes a feed stream to the alkylation zone.Type: GrantFiled: July 11, 1974Date of Patent: January 6, 1976Assignee: Universal Oil Products CompanyInventor: Michael Z. Mikulicz