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| Number | Title | Issue Date |
| 7368617 | Selective hydrogenation of acetylenes and dienes in a hydrocarbon stream Acetylenes and dienes in a stream containing hydrogen, methane, C2-C6 olefins and paraffins, C2-C6 acetylenes and dienes, benzene, toluene, xylenes, and other C6+ components are hydrogenated in a downflow boilin... | 05/06/2008 |
| 7351327 | Process for the selective desulfurization of a mid range gasoline cut A process for concurrently fractionating and treating a full range naphtha stream. The full boiling range naphtha stream is first subjected to simultaneous thioetherification and splitting into a light boiling range naphtha, an intermediate boiling range naphtha and... | 04/01/2008 |
| 7291258 | HDS process using selected naphtha streams A process for concurrently fractionating and hydrotreating a full range naphtha stream. The full boiling range naphtha stream is subjected to simultaneous hydrodesulfurization and splitting into a light boiling range naphtha and a heavy boiling range naphtha, which ... | 11/06/2007 |
| 7288686 | Hydrogenation catalyst and hydrogenation process A supported hydrogenation catalyst comprising (1)Pd or a Group 8 metal comprising Pd and one other Group 8 metal, preferably a Group 8 metal selected from Pt, Ir, Ru, Co or Ni, and (2) at least two metals selected from Ag, Zn or Bi, preferably Ag and at least one of... | 10/30/2007 |
| 7288183 | Process for desulphurizing gasoline by adsorption The invention concerns a process for desulphurizing gasoline comprising a step for fractionating said gasoline under conditions in which a light fraction comprising the lightest thiophene compounds such as thiophene or methylthiophenes and a heavy fraction concentra... | 10/30/2007 |
| 7256152 | Composition of catalyst and solvent and catalysis processes using this composition A composition defined: either as comprising at least one Broensted acid, designated HB, dissolved in a liquid medium with an ionic nature of general formula Q+A−, in which Q+ represents an organic cation and A− represents an an... | 08/14/2007 |
| 7223333 | Process for hydrodesulphurization of cuts containing sulphur containing compounds and olefins in the presence of a catalyst comprising an element of group VIII and tungsten Conducting the hydrodesulphurization of gasoline cuts in the presence of a catalyst comprising at least one support, at least one element of group VIII and tungsten, in which the atomic ratio (element of group VIII)/(element of group VIII+tungsten) is greater than 0... | 05/29/2007 |
| 7208646 | Selective hydrogenation of butadiene A process for the selective hydrogenation of dienes in mixed streams of olefin containing hydrocarbons, such as butadiene in a mixed C4 stream with minimum loss of monoolefins is disclosed wherein the reactor is operated at conditions which induce pulse f... | 04/24/2007 |
| 7198712 | Processing for eliminating sulfur-containing compounds and nitrogen-containing compounds from hydrocarbon For desulfurization and, if necessary, for denitrification of hydrocarbon fractions the hydrocarbon mixture is brought into contact with a non-aqueous ionic liquid of general formula Q+A−, wherein Q+ is a ammonium, phosphonium or s... | 04/03/2007 |
| 7153415 | Process for the treatment of light naphtha hydrocarbon streams A light cracked naphtha is treated to convert mercaptans to sulfides and saturate dienes and then subjected to destructive hydrodesulfurization (HDS) to convert the organic sulfur compounds to hydrogen sulfide. The recombinant mercaptans formed by reaction of hydrog... | 12/26/2006 |
| 6929702 | Compositions and methods for releasing adherent deposits from surfaces and substrates Compositions and methods for release of adherent deposits from surfaces and substrates are provided. The compositions are low volatile organic compound (low VOC) compositions, solutions or mixtures. Adherent deposits removed using the compositions include grease and... | 08/16/2005 |
| 6736963 | Multiple stage process for removal of sulfur from components for blending of transportation fuels Economical processes are disclosed for the production of fuels of reduced sulfur content from a feedstock, typically derived from natural petroleum, wherein the feedstock is comprised of limited amounts of sulfur-containing organic compounds as unwanted impurities. ... | 05/18/2004 |
| 6733660 | Multistage process for removal of sulfur from components for blending of transportation fuels Economical processes are disclosed for the production of fuels of reduced sulfur content from a feedstock, typically derived from natural petroleum, wherein the feedstock is comprised of limited amounts of sulfur-containing organic compounds as unwanted impurities. ... | 05/11/2004 |
| 6638419 | Method for obtaining oil products with low sulphur content by desulfurization of extracts 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... | 10/28/2003 |
| 6531103 | Process for removing sulfur compounds from gas and liquid hydrocarbon streams The present invention provides a process for removing sulfur compounds including sulfur in the (-2) oxidation state such as mercaptans, dialkyl sulfides, carbonyl sulfide, hydrogen sulfide, thiophenes and benzothiophenes, from liquid or gas feed streams, ... | 03/11/2003 |
| 6488840 | Mercaptan removal from petroleum streams (Law950) This invention relates to reducing the amount of thiols (mercaptans) in petroleum streams, specifically, mercaptans above the five carbon molecular weight range.... | 12/03/2002 |
| 6406616 | Process for removing low amounts of organic sulfur from hydrocarbon fuels 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 contac... | 06/18/2002 |
| 6402940 | Process for removing low amounts of organic sulfur from hydrocarbon fuels 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 ox... | 06/11/2002 |
| 6358402 | Extractive distillation process for the reduction of sulfur species in hydrocarbons streams A method for separating sulfur species from hydrocarbon streams, particularly cracked naphtha streams, using extractive distillation. The method effectively separates sulfur species from cracked naphtha streams without substantially lowering the olefin co... | 03/19/2002 |
| 6334949 | Process for the removal of carbonyl sulfide from liquid petroleum gas A method for the removal of carbonyl sulfide from liquefied petroleum is disclosed. Removal of carbonyl sulfide is accomplished by contacting a liquid petroleum gas stream containing a carbonyl sulfide as an impurity with a calixarene complexing agent as ... | 01/01/2002 |
| 6267938 | Scavengers for use in reducing sulfide impurities A method is provided for reducing the amount of hydrogen sulfide and organic sulfides present in streams, such as natural gas streams, by scrubbing the stream with a composition containing (i) an aqueous phase containing a reaction product resulting from ... | 07/31/2001 |
| 6231755 | Desulfurization of petroleum products The invention discloses a process for the desulfurization of petroleum products by contacting with acidic organic polymers. Preferably, highly fluorinated and, most preferably, perfluorinated acidic organic polymers are used.... | 05/15/2001 |
| 6221277 | Composition for removing sulfur compounds from fluids The present invention relates to an activated metal oxide and methods for removing sulfur compounds from fluids, whereby the activated metal oxide includes an amount of metal oxide and an amount of ethoxylated fatty amine, with the ethoxylated fatty amine... | 04/24/2001 |
| 6059962 | Multiple stage sulfur removal process A product of reduced sulfur content is produced in a multiple stage process from a feedstock which is comprised of a mixture of hydrocarbons and includes sulfur-containing aromatic compounds as unwanted impurities. The first stage involves: (1) subjecting... | 05/09/2000 |
| 6048451 | Sulfur removal process A product of reduced sulfur content is produced from a feedstock which is comprised of a mixture of hydrocarbons and contains organic sulfur compounds as unwanted impurities. The process comprises converting at least a portion of the sulfur-containing imp... | 04/11/2000 |
| 5863419 | Sulfur removal by catalytic distillation A product of reduced sulfur content is produced from a feedstock which is comprised of a mixture of hydrocarbons and contains organic sulfur compounds as unwanted impurities. The process comprises converting at least a portion of the sulfur-containing imp... | 01/26/1999 |
| 5851383 | Process for thioetherification and selective hydrogenation of light olefins A light hydrocarbon stream, such as a C3 -C5 stream recovered from an FCC unit, is catalytically treated for the selective hydrogenation of dienes and for the removal of mercaptans by thioetherification. The effluent of the reaction ... | 12/22/1998 |
| 5807477 | Process for the treatment of light naphtha hydrocarbon streams A process for treating a light cracked naphtha to be used as an etherification or alkylation feedstock in which the mercaptans and diolefins reacted in a single pass fixed bed reactor and are removed in a distillation column reactor which hydrogenate the ... | 09/15/1998 |
| 5759386 | Process for thioetherification and selective hydrogenation of light hydrocarbons A light hydrocarbon stream, such as a C3 -C5 stream recovered from an FCC unit, is catalytically treated for the selective hydrogenation of dienes and for the removal of mercaptans by thioetherification. The effluent of the reaction ... | 06/02/1998 |
| 5753102 | Process for recovering organic sulfur compounds from fuel oil The present invention provides a process and equipment for efficiently and economically recovering organic sulfur compounds in a fuel oil while maintaining the original chemical structures thereof. The fuel oil is admixed with a solvent low in solubility ... | 05/19/1998 |
| 5354453 | Removal of H2 S hydrocarbon liquid Reactive S (e.g. H2 S and mercaptans) in petroleum liquid are scavenged by the use of oil soluble trialkyl hexahydro triazines wherein at least one alkyl group, and preferably all three, contain from 7 to 20 carbon atoms.... | 10/11/1994 |
| 5242672 | Process for removing sulfur from organic polysulfides A process for removing sulfur from an organic polysulfide by reaction with an aqueous stripping solution of at least one sulfide salt and/or hydrosulfide salt in a multi-stage, continuous, countercurrent flow, reaction system wherein the sulfur is strippe... | 09/07/1993 |
| 5034118 | Non-oxidative removal of hydrogen sulfide from gaseous, petrochemical, and other streams Hydrogen sulfide can be conveniently removed from streams containing up to about 1,000 ppm of H2 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... | 07/23/1991 |
| 5017280 | Process for recovering metals and for removing sulfur from materials containing them by means of an oxidative extraction 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... | 05/21/1991 |
| 4585546 | Hydrotreating petroleum heavy ends in aromatic solvents with large pore size alumina Residual oils containing metals and sulfur are demetallized and desulfurized by adding to the oil an aromatic solvent and contacting the mixtures in the presence of hydrogen with an alumina having an average pore size greater than about 220 Angstroms.... | 04/29/1986 |
| 4568452 | Process for upgrading a contaminated absorbent oil An absorbent hydrocarbonaceous oil comprising contaminants, such as sulfur and/or nitrogen, is upgraded by subjecting the contaminated absorbent oil to hydrorefining. The upgraded absorbent may be utilized again as absorbent.... | 02/04/1986 |
| 4465493 | Desulfurization process for coal and other carbonaceous materials A desulfurization process is described which consists of heating an organic hydrocarbon like coal or bitumen in a stream of a gaseous or liquid trapping material for hydrogen sulfide (H2 S). The organic sulfur in the hydrocarbon decomposes and ... | 08/14/1984 |
| 4465589 | Removal of contaminants from organic compositions Metals, nitrogen and/or sulfur, particularly vanadium, nickel and nitrogen, are removed from organic compositions, particularly heavy hydrocarbon oils, by contacting the organic composition with a methylating agent, preferably dimethyl sulfate, under cond... | 08/14/1984 |
| 4464251 | Removal of contaminants from organic compositions Metals, nitrogen and/or sulfur, particularly vanadium, nickel and nitrogen, are removed from organic compositions, particularly heavy hydrocarbon oils, by contacting the organic compositions with a halogenating agent, preferably phosphorus oxychloride, un... | 08/07/1984 |
| 4397736 | Hydrotreating supercritical solvent extracts in the presence of alkane extractants A process of recovering the hydrocarbon values from low organic carbon content deposits comprises the hydrotreating of hydrocarbons from those deposits in the presence of supercritical alkane-containing solv... | 08/09/1983 |
