| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 208219000 | With acids | 18 |
| 20090000990 | Method of Desulfurizing Hydrocarbon Oil - A method of desulfurizing/refining a hydrocarbon oil by which sulfur compounds are diminished to an extremely low concentration at a relatively low equipment cost and operating cost. The method of desulfurizing/refining a hydrocarbon oil comprises bringing a hydrocarbon oil containing at least one sulfur compound selected from the group consisting of thiophene compounds, benzothiophene compounds, and dibenzothiophene compounds and optionally further containing aromatic hydrocarbons into contact with a solid acid catalyst and/or an activated carbon having a transition metal oxide supported thereon to thereby desulfurize the oil. The solid acid catalyst preferably is a solid ultrastrong-acid catalyst selected among sulfuric acid radical/zirconia, sulfuric acid radical/alumina, sulfuric acid radical/tin oxide, sulfuric acid radical/iron oxide, tungstic acid/zirconia, and tungstic acid/tin oxide. | 01-01-2009 |
| 20090008295 | DESULFURIZATION PROCESS AND SYSTEMS UTILIZING HYDRODYNAMIC CAVITATION - Processes and systems associated with hydrodynamic cavitation-catalyzed oxidation of sulfur-containing substances in a fluid are described. In one example method, carbonaceous fluid is combined with at least one oxidant to form a mixture and then the mixture is flowed through at least one local constriction in a flow-through chamber at a sufficient pressure and flow rate to create hydrodynamic cavitation in the flowing mixture having a power density of between about 3,600 kWatts/cm | 01-08-2009 |
| 20090230027 | METHODS AND COMPOSITIONS FOR REMOVING SULFUR FROM LIQUID HYDROCARBONS - Improved desulfurization compositions are provided for removing substantial fractions of sulfur, sulfur complexes, and sulfur compounds from liquid hydrocarbons such as crude oil and fuels. The preferred compositions comprise respective quantities of an alkylphenol ethoxylate, an amine, and an alkali metal nitrite. The compositions may be contacted with liquid hydrocarbons to achieve high levels of desulfurization. | 09-17-2009 |
| 20100122937 | METHOD AND SYSTEM FOR REMOVING IMPURITIES FROM HYDROCARBON OILS VIA LEWIS ACID COMPLEXATION - A method is provided for purifying a hydrocarbon oil comprising a quantity of impurities. A Lewis acid solution comprising a Lewis acid and an aprotic solvent is added to the hydrocarbon oil having the plurality of impurities, e.g. sulfur, vanadium, and nickel impurities, to form a mixture. Complexes are formed between the Lewis acid of the Lewis acid solution and a respective one of the impurities in the mixture. The mixture is separated into a first layer that comprises a purified fraction of the hydrocarbon oil and a second layer comprising the complexes dissolved in the aprotic solvent. | 05-20-2010 |
| 20100147748 | ADSORPTION OF DIBENZOTHIOPHENES FROM HYDROCARBON AND MODEL DIESEL FEEDS - A process for adsorbing aromatic sulfur compounds, where an adsorbent is contacted with a C | 06-17-2010 |
| 20100176031 | POROUS SOLIDS, SELECTIVE SEPARATIONS, REMOVAL OF SULFUR COMPOUNDS, ADSORPTION - Crystals of [VOBDC](H | 07-15-2010 |
| 20120055848 | Method of scavenging hydrogen sulfide from hydrocarbon stream - The invention is related to hydrogen sulfide scavenging additive, capable of scavenging hydrogen sulfide in hydrocarbons by forming water soluble scavenged products which are capable of getting separated from hydrocarbon even at acidic pH without causing fouling and decomposition problems, consisting of aldehyde or aldehyde and polyethylene glycol [PEG], and wherein said aldehyde is glyoxylic acid. The invention is also related to a method of scavenging hydrogen sulfide employing present scavenging additive. | 03-08-2012 |
| 208220000 | Plural stages of sulfur removal | 4 |
| 20090065398 | Solid acid assisted deep desulfurization of diesel boiling range feeds - The instant invention relates to a process to produce low sulfur diesel products through the hydrodesulfurization of low nitrogen diesel boiling range feedstreams in the presence of solid acidic materials. | 03-12-2009 |
| 20090200205 | SULFUR EXTRACTION FROM STRAIGHT RUN GASOLINE - A process for reducing the sulfur content of a gasoline fraction comprising one or more organic sulfur compounds including mercaptans, thiophenes, and mono- and di-sulfides, the process including: contacting a gasoline fraction having an initial organic sulfur content with a sulfuric acid-rich composition to extract organic sulfur compounds from the gasoline fraction and produce a gasoline fraction having reduced sulfur content and a sulfuric acid fraction having increased organic sulfur content; and separating the gasoline fraction having reduced organic sulfur content and the sulfuric acid-rich fraction having increased organic sulfur content. | 08-13-2009 |
| 20110108464 | METHODS FOR UPGRADING OF CONTAMINATED HYDROCARBON STREAMS - 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. | 05-12-2011 |
| 20120285864 | METHODS FOR UPGRADING OF CONTAMINATED HYDROCARBON STREAMS - 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. | 11-15-2012 |
| 208221000 | With preliminary treatment of feed | 2 |
| 20100264067 | METHOD FOR REMOVING IMPURITIES FROM HYDROCARBON OILS - A method for removing impurities from a feedstock comprising a hydrocarbon oil is provided. The method comprises contacting the feedstock with an oxygen-containing gas under conditions effective to oxidize at least a portion of the impurities, as well as contacting the feedstock with a Lewis acid under conditions effective so that any Lewis base impurity(ies) in the feedstock can react with the Lewis acid. Any impurities so oxidized and/or reacted are then removed. | 10-21-2010 |
| 20140284251 | Fuel Desulfurization Method - A fuel desulfurization method is provided in the present invention. In the step (a), a fuel is oxidized by adding an ionic liquid, an oxidant, and an acid catalyst. In the step (b), the oxidized fuel is mixed with a desulfurization agent to form a desulfurized fuel. In the step (c), the ionic liquid is recycled. In the recycling step, a first solution is added into the ionic liquid. Then, a second solution is added into the ionic liquid to form a second solution phase and an ionic liquid phase. The second solution phase is separated from the ionic liquid phase. The first solution, the oxidant and the acid catalyst are removed from the remained ionic liquid phase to form a recycled ionic liquid. | 09-25-2014 |
| 208222000 | With subsequent treatment of product | 1 |
| 20090200206 | Catalytic Process for Deep Oxidative Desulfurization of Liquid Transportation Fuels - Sulfur-containing compounds, including specifically thiophenic compounds, in a liquid hydrocarbon feedstream are catalytically oxidized by combining the hydrocarbon feedstream with a catalytic reaction mixture that includes a peroxide that is soluble in water or in a polar organic acid, at least one carboxylic acid, and a catalyst that is a transition metal salt selected from the group consisting of (NH | 08-13-2009 |
| 208223000 | Inorganic acid | 4 |
| 20090314688 | METHOD FOR CAVITATION-ASSISTED REFINING, DEGUMMING AND DEWAXING OF OIL AND FAT - 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. | 12-24-2009 |
| 20100155303 | METHOD FOR DESULFURIZATION OF HYDROCARBON OIL - 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. | 06-24-2010 |
| 20140299512 | PROCESS FOR REMOVING SULPHUR COMPOUNDS FROM HYDROCARBONS - Processes are disclosed for reducing the sulphur content of a hydrocarbon material containing sulphur compounds. | 10-09-2014 |
| 208224000 | Sulfuric acid | 1 |
| 20100140142 | REMOVING UNSTABLE SULFUR COMPOUNDS FROM CRUDE OIL. - 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. | 06-10-2010 |
