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| Number | Title | Issue Date |
| 7572365 | Modified thermal processing of heavy hydrocarbon feedstocks The present invention is directed to the upgrading of heavy petroleum oils of high viscosity and low API gravity that are typically not suitable for pipelining without the use of diluents. It utilizes a short residence-time pyrolytic reactor operating under conditio... | 08/11/2009 |
| 7435337 | Use of caesium-exchanged faujasite type zeolites for intense desulphurization of a gasoline cut The invention describes the application of caesium-exchanged X, Y or LSX type faujasite zeolites for intense desulphurization of FCC gasoline, and to a method for preparing said zeolites. ... | 10/14/2008 |
| 7374666 | Oxidative desulfurization of sulfur-containing hydrocarbons A method for desulfurizing a hydrocarbon stream (10) containing heterocyclic sulfur compounds, which process comprises contacting the heterocyclic sulfur compounds in the gas phase (60) in the presence of oxygen (70) with a supported metal oxide... | 05/20/2008 |
| 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 |
| 7276634 | Reduction of the viscosity of reactive heavy byproducts during the production of 1,3-propanediol The present invention is an improvement upon the process for the production of 1,3-propanediol wherein an aqueous solution of 3-hydroxy propanal is formed, catalyst, if any, used in said formation is removed from the solution, sodium hydroxide is added to the soluti... | 10/02/2007 |
| 7268097 | Desulfurizing agent for hydrocarbon derived from petroleum, method for producing hydrogen for use in fuel cell and method for producing nickel-based desulfurizing agent A desulfurizing agent comprising a silica-alumina carrier having an Si/Al mole ratio of 10 or less and nickel carried thereon; a desulfurizing agent for hydrocarbons derived from petroleum which comprises a carrier and a metal component carried thereon and has a spe... | 09/11/2007 |
| 7207445 | Device and method for non-dispersive contacting of liquid—liquid reactive system An apparatus for separating impurities from a liquid by a non-dispersive contacting of a liquid—liquid reactive systems, the liquids being immiscible with each other, having a cylindrical column separated into a first stage and a second stage, a plurality of modul... | 04/24/2007 |
| 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 |
| 7029573 | Composition and control method for treating hydrocarbon The invention relates to a composition and method for treating liquid hydrocarbons in order to remove acidic impurities, such as mercaptans, particularly mercaptans having a molecular weight of about C4 (C4H10S=90 g/mole) and higher,... | 04/18/2006 |
| 7014751 | Continuous liquid hydrocarbon treatment method The invention relates to a method for treating and upgrading a hydrocarbon containing acidic species such as mercaptans, comprising: (a) contacting the hydrocarbon, in the essential absence of oxygen, with a first phase of a treatment composition containing w... | 03/21/2006 |
| 6960291 | Naphtha desulfurization method The invention relates to a method for desulfurizing naphtha boiling-range hydrocarbons such as cracked naphtha. More particularly, the invention relates to hydrotreating the naphtha under selective hydrotreating conditions, and then removing mercaptans from the hydr... | 11/01/2005 |
| 6955753 | Treatment of crude oils A process and apparatus to extract and recover heavy metals and sulfur from crude oil or petroleum fuel products including the steps of emulsifying the crude oil with an emulsifying agent, adding a leach solution to the emulsified crude oil and leaching the emulsifi... | 10/18/2005 |
| 6840429 | Method of and composition for treating a non-metallic refractory material for brazing A coating composition and its use in a metallization process that facilitates bonding of brazing filler metals to treated refractory surfaces, such as ceramics. The coating can be applied in preselected areas of the refractory surface to define a target area for bra... | 01/11/2005 |
| 6756022 | Apparatus for removing sulfur-containing component in fuel There is provided a desulphurization apparatus to be mounted in automobiles, which is arranged between a fuel tank and an injector of an engine, the apparatus comprising a combination of a sulfur-containing compound adsorbent for adsorbing and concentrating the sulf... | 06/29/2004 |
| 6749741 | Apparatus and process for prewashing a hydrocarbon stream containing hydrogen sulfide Disclosed 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... | 06/15/2004 |
| 6723230 | Regeneration of iron-based hydrogen sulfide sorbents A process to regenerate iron-based hydrogen sulfide sorbents using steam. The steam is preferably mixed with hydrogen-containing gas and/or an inert gas, such as nitrogen. In a preferred embodiment, the sorbent is first exposed to the steam and then exposed to a hyd... | 04/20/2004 |
| 6623627 | Production of low sulfur gasoline A process for desulfurizing a gasoline stream while continuing to maintain the octane rating of the blend stock. A gasoline stream containing sulfur compounds and olefins is introduced into a fractionation zone to produce a low boiling fraction containing... | 09/23/2003 |
| 6569390 | Liquid-liquid extraction trays Cartridge type extraction trays for use in a small diameter liquid-liquid extraction column comprise a novel vertical wall which surrounds the active (perforated) area of the tray. This wall extends upward to a sufficient height to retain the heavy liquid... | 05/27/2003 |
| 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 |
| 6495029 | Countercurrent desulfurization process for refractory organosulfur heterocycles A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds present in petroleum and chemical streams. The stream is passed through at least one reaction zone countercurrent to the flow of a hydrogen-con... | 12/17/2002 |
| 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 |
| 6428685 | Desulfurization and novel sorbents for same Particulate sorbent compositions which are suitable for the removal of sulfur from streams of cracked-gasoline or diesel fuel are provided which have increased porosity, improved resistance to deactivation through the addition of a calcium compound select... | 08/06/2002 |
| 6325921 | Method for catalytic removal of metal compounds from heavy oils The invention relates to a method for catalytic removal of metal compounds from heavy oils, in which a catalyst with a content of a metal of group IVB and a metal of group IA of the periodic system is used, at temperatures between 300 and 550° C. and at ... | 12/04/2001 |
| 6306288 | Process for removing sulfur compounds from hydrocarbon streams A process for removing H2 S and mercaptans from a hydrocarbon stream is disclosed. A hydrocarbon stream such as a LPG stream is contacted with a weakly basic stream, e.g., a sodium bicarbonate stream in order to extract the H2 S and ... | 10/23/2001 |
| 6245221 | Desulfurization process for refractory organosulfur heterocycles A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams over noble metal-containing catalysts under relatively mild conditions. The noble metal is selected ... | 06/12/2001 |
| 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 |
| 6224750 | Producing low sulfur hydrocarbons with biologically regenerated caustic A process is disclosed for producing very low sulfur content hydrocarbon streams by contacting a hydrocarbon feedstream with an aqueous alkaline treatment stream which has been regenerated by the biological conversion of sulfur compounds to elemental sulf... | 05/01/2001 |
| 6221240 | Desulfurization and aromatic saturation of feedstreams containing refractory organosulfur heterocycles and aromatics A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams and the saturation of aromatics over noble metal-containing catalysts under relatively mild conditio... | 04/24/2001 |
| 6129833 | Catalytic cracking with reduced emission of sulfur oxides Sulfur oxides are removed in the regenerator zone and rapidly released as H2 S in the reactor zone of an FCC system employing a particulate SOx catalytic/absorbent comprising Cu and an alkali metal oxide. Embodiments include the use ... | 10/10/2000 |
| 6103106 | Desulfurization and ring opening of petroleum streams A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds and the ring opening of ring compounds present in petroleum and petrochemical streams. The process is conducted in the presence of hydrogen, on... | 08/15/2000 |
| 5997731 | Process for treating an effluent alkaline stream having sulfur-containing and phenolic compounds An alkaline solution containing dissolved sodium sulfides, mercaptides and phenolates is treated with a carbon dioxide-containing solvent in a reaction zone under mass transfer conditions to neutralize effluent alkaline solution and recover processable hy... | 12/07/1999 |
| 5985137 | Process to upgrade crude oils by destruction of naphthenic acids, removal of sulfur and removal of salts A method for upgrading an oil stream containing naphthenic acid and sulfur contaminants is described. In this method, an oil stream with naphthenic acid and sulfur contaminants is upgraded by the following steps. First, the oil stream is mixed with an alk... | 11/16/1999 |
| 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 |
| 5961819 | Treatment of sour hydrocarbon distillate with continuous recausticization An improved process is described for removing mercaptan sulfur from sour hydrocarbon distillate streams comprising of treating a sour hydrocarbon distillate stream in two oxidation zones within a reaction vessel. The first treatment occurs in the presence... | 10/05/1999 |
| 5958365 | Method of producing hydrogen from heavy crude oil using solvent deasphalting and partial oxidation methods Heavy crude oil is recovered and processed at a refinery through (a) a distillation zone(s), (b) a solvent deasphalting unit (c ) a high pressure air partial oxidation gasifier to produce a CO-rich gas mixture including hydrogen, (d) a shift reactor and (... | 09/28/1999 |
| 5954949 | Conversion of heavy petroleum oils to coke with a molten alkali metal hydroxide A method is described for making a high purity coke fuel or anode grade coke from a heavy petroleum residuum by contacting a molten anhydrous alkali metal hydroxide with the heavy petroleum residuum at a temperature and for a time sufficient to extract su... | 09/21/1999 |
| 5935420 | Desulfurization process for refractory organosulfur heterocycles A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams over noble metal-containing catalysts under relatively mild conditions. The noble metal is selected ... | 08/10/1999 |
| 5935421 | Continuous in-situ combination process for upgrading heavy oil The invention relates to an integrated, continuous process for the removal of organically bound sulfur (e.g., mercaptans, sulfides and thiophenes) comprising the steps of contacting a heavy oil, sodium hydroxide, hydrogen and water at a temperature of fro... | 08/10/1999 |
| 5928498 | Desulfurization and ring opening of petroleum streams A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds and the ring opening of ring compounds present in petroleum and petrochemical streams. The process is conducted in the presence of hydrogen, on... | 07/27/1999 |
| 5925239 | Desulfurization and aromatic saturation of feedstreams containing refractory organosulfur heterocycles and aromatics A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams and the saturation of aromatics over noble metal-containing catalysts under relatively mild conditio... | 07/20/1999 |
