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| Number | Title | Issue Date |
| 7388121 | Process to separate butadiene dimers The invention relates to a process to separate butadiene dimers from a mixture comprising butadiene dimers and alkyl-3-pentenoate and/or isomers thereof wherein the butadiene dimers are separated from said mixture by distillation in the presence of an alcohol and in... | 06/17/2008 |
| 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 |
| 7326333 | Apparatus and process for extracting sulfur compounds from a hydrocarbon stream Described is an apparatus and process for extracting sulfur compounds from a hydrocarbon stream. A prewash section for converting hydrogen sulfide to sodium sulfide by reaction with an alkali such as caustic communicates with an extractor section disposed directly a... | 02/05/2008 |
| 7314545 | Desulfurization process This invention is a method of purifying fuels containing organosulfur impurities. The fuel is oxidized with an organic hydroperoxide in the presence of an oxidation catalyst to form a sulfone product, followed by extraction of the sulfone product by solid-liquid or ... | 01/01/2008 |
| 7300568 | Method of manufacturing oxygenated fuel Disclosed is a process to improve the cetane number and emissions characteristics of a distillate feedstock by increasing the oxygen content of the feedstock by contacting the feedstock with an oxygen-containing gas in the oxidation zone at oxidation conditions in t... | 11/27/2007 |
| 7297253 | Process for producing hydroperoxides A process for the autocatalytic production of organic hydroperoxides and ultra low sulfur diesel boiling range hydrocarbons is disclosed. The organic hydroperoxides react with sulfur compounds to produce sulfones, and the sulfones can be removed from the diesel boil... | 11/20/2007 |
| 7276152 | Oxidative desulfurization and denitrogenation of petroleum oils A robust, non-aqueous, and oil-soluble organic peroxide oxidant is employed for oxidative desulfurization and denitrogenation of hydrocarbon feedstocks including petroleum fuels. Even at low concentrations, the non-aqueous organic peroxide oxidant is extremely activ... | 10/02/2007 |
| 7276153 | Method for neutralising a stream of hydrocarbon fluid In a process for deacidifying a fluid hydrocarbon stream which comprises carbon dioxide (CO2) and/or other acid gases as impurities, the fluid stream is brought into intimate contact with an absorption liquid in an absorption or extraction zone (12... | 10/02/2007 |
| 7270742 | Organosulfur oxidation process This invention is a method of purifying fuel streams containing organonitrogen and organosulfur impurities. The fuel stream is first treated to extract organonitrogen impurities so that the nitrogen content of the fuel stream is reduced by at least 50 percent. After... | 09/18/2007 |
| 7252756 | Preparation of components for refinery blending of transportation fuels 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 con... | 08/07/2007 |
| 7179368 | Method for desulfurizing thiophene derivatives contained in fuels The invention concerns a method for selectively desulphurizing thiopene compounds contained in hydrocarbons derived from crude oil distillation, whether refined or not, which consists in oxidising the thiophene sulphur atoms into sulphone in the presence of an oxidi... | 02/20/2007 |
| 7144499 | Desulfurization process This invention is a method of purifying fuel streams containing organosulfur impurities. The fuel stream is oxidized with an organic hydroperoxide in the presence of an oxidation catalyst to form a sulfone product. The alcohol product of the organic hydroperoxide is... | 12/05/2006 |
| 7128829 | Removal of impurities from liquid hydrocarbon streams A novel process effective for the removal of organic sulfur compounds, organic nitrogen compounds and light olefins from liquid hydrocarbons is disclosed. The process more specifically addresses the removal of these contaminants from aromatic compounds including ben... | 10/31/2006 |
| 6933323 | Production of stable olefinic fischer tropsch fuels with minimum hydrogen consumption The present invention relates to a stable, low sulfur, olefinic distillate fuel blend component derived from a Fischer-Tropsch process and a process for producing this stable, low sulfur, olefinic distillate fuel blend component. The stable, low sulfur, olefinic dis... | 08/23/2005 |
| 6923904 | Process for effecting ultra-deep HDS of hydrocarbon feedstocks The invention pertains to a process for reducing the sulfur content of a hydrocarbon feedstock to a value of less than 200 ppm, preferably less than 50 ppm, which comprises subjecting a catalyst comprising a Group VIB metal component, a Group VIII metal component, a... | 08/02/2005 |
| 6872752 | High purity olefinic naphthas for the production of ethylene and propylene The present invention relates to an olefinic naphtha and a process for producing lower olefinc from this naphtha. In the process of the present invention for producing lower olefins, preferably ethylene, at least a portion of a hydrocarbon asset is converted to synt... | 03/29/2005 |
| 6846406 | Process and catalysts for eliminating sulphur compounds from the gasoline fraction The object of the present invention is a process for the elimination of sulphur compounds from the gasoline fraction, characterized in that it comprises carrying out an oxidation reaction of said sulphur compounds using at least one organic-inorganic composite as a ... | 01/25/2005 |
| 6827845 | Preparation of components for refinery blending of transportation fuels Economical processes are disclosed for the production of components for refinery blending of transportation fuels by selective oxidation of feedstocks comprising a mixture of hydrocarbons, sulfur-containing and nitrogen-containing organic compounds. Oxidation feedst... | 12/07/2004 |
| 6827844 | Ultrasound-assisted desulfurization of fossil fuels in the presence of dialkyl ethers Fossil fuels are combined with an aqueous liquid and a dialkyl ether to form an aqueous-organic reaction medium which is passed through an ultrasound chamber on a continuous flow-through basis. The emerging mixture separates spontaneously into aqueous and organic ph... | 12/07/2004 |
| 6802959 | Separation of olefinic hydrocarbons from sulfur-containing hydrocarbons by use of a solvent A process for separating olefins from sulfur-containing hydrocarbons contained in a hydrocarbon feedstock is disclosed and includes contacting the hydrocarbon feedstock with N-hydroxyethyl pyrollidone in a contacting zone, removing at least one olefin overhead from ... | 10/12/2004 |
| 6673236 | Method for the production of hydrocarbon fuels with ultra-low sulfur content The present invention provides a method for producing hydrocarbon fuels with ultra-low levels of sulfur. The method involves catalytic oxidation of the sulfurous compounds within the hydrocarbon fuel, followed by extraction of the oxidized (and polarized)... | 01/06/2004 |
| 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 |
| 6596914 | Method of desulfurization and dearomatization of petroleum liquids by oxidation and solvent extraction 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 recov... | 07/22/2003 |
| 6547959 | Method for treating hazardous and corrosion-inducing sulfur compounds A method for treating compounds which contain reactive sulfur is disclosed, wherein the treatment produces compounds which contain sulfur in a non reactive form. The method is based on the use of an oxidizing compound selected from the group consisting of... | 04/15/2003 |
| 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 |
| 6441264 | Method for separating benzothiophene compounds from hydrocarbon mixture containing them, and hydrocarbon mixture obtained by said method A method for separating at least a benzothiophene compound from a hydrocarbon mixture is disclosed. The method includes contacting the mixture of a fraction obtained therefrom with a reagent including an acceptor complexing agent π, to obtain a donor-acc... | 08/27/2002 |
| 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 |
| 6402939 | Oxidative desulfurization of fossil fuels with ultrasound Fossil fuels are combined with a hydroperoxide in an aqueous-organic medium and subjected to ultrasound, with the effect of oxidizing the sulfur compounds in the fuels to sulfones. Due to their high polarity, the sulfones thus formed are readily removed f... | 06/11/2002 |
| 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 |
| 6368495 | Removal of sulfur-containing compounds from liquid hydrocarbon streams A novel process effective for the removal of organic sulfur compounds from liquid hydrocarbons is disclosed. The process more specifically addresses the removal of thiophenes and thiophene derivatives from a number of petroleum fractions, including gasoli... | 04/09/2002 |
| 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 |
| 6320090 | Method of removing contaminants from petroleum distillates Polynuclear aromatic hydrocarbons (PAHs) and other contaminants are removed from petroleum distillates by mixing a solvent with petroleum distillate to extract the contaminants therefrom. The solvent is recovered and distilled to separate the contaminants... | 11/20/2001 |
| 6277271 | Process for the desulfurization of a hydrocarbonaceoous oil A process for the desulfurization of hydrocarbonaceous oil wherein the hydrocarbonaceous oil and a recycle stream containing sulfur-oxidated compounds is contacted with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone to reduce the ... | 08/21/2001 |
| 6274785 | Method of desulfurization of hydrocarbons A method for the removal of sulfur and nitrogen containing compounds from petroleum distillates. Sulfur- and nitrogen-containing compounds are oxidized using a selective oxidant to create compounds that can be preferentially extracted from a petroleum dis... | 08/14/2001 |
| 6242618 | H2S scavengers for polysulfide products and methods for scavenging H2S from polysulfide products Invention relates to H2 S scavengers polysulfide compounds and methods for scavenging H2 S from polysulfide compounds. Furthermore, the invention uses a scavenger for selectively reducing the levels of hydrogen sulfide present in a p... | 06/05/2001 |
| 6207043 | Method of preparing low-sulphur aliphatic compounds Low-sulfur aliphatic compounds are obtained from olefin-rich starting materials contaminated with organic sulfur compounds.... | 03/27/2001 |
| 6171478 | Process for the desulfurization of a hydrocarbonaceous oil A process for the desulfurization of hydrocarbonaceous oil wherein the hydrocarbonaceous oil is contacted with a hydrodesulfurization catalyst in a hydrodesulfurization reaction zone to reduce the sulfur level to a relatively low level and then contacting... | 01/09/2001 |
| 6160193 | Method of desulfurization of hydrocarbons A method for the removal of sulfur and nitrogen containing compounds from petroleum distillates. Sulfur- and nitrogen-containing compounds are oxidized using a selective oxidant to create compounds that can be preferentially extracted from a petroleum dis... | 12/12/2000 |
| 5980845 | Regeneration of hydrogen sulfide scavengers The present invention generally provides sulfide scavenger solutions and processes that have high sulfide scavenging capacity, provide a reduction or elimination of solids formation and avoid the use of chemicals that pose environmental concerns. The inve... | 11/09/1999 |
| 5961820 | Desulfurization process utilizing an oxidizing agent, carbonyl compound, and hydroxide Sulfur-containing carbonaceous materials are desulfurized by reaction with a mixture of an oxidizing agent and a carbonyl compound under alkaline conditions at a temperature ranging from ambient temperature to about 250° F. and a pressure of about 1 atmo... | 10/05/1999 |
