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| Number | Title | Issue Date |
| 7981276 | Desulfurization of petroleum streams utilizing a multi-ring aromatic alkali metal complex The present invention relates to a process for removing sulfur from sulfur-containing hydrocarbon streams utilizing a multi-ring aromatic hydrocarbon complex containing an alkali metal ion. Preferably, the sulfur-containing hydrocarbon stream is comprised of high mo... | 07/19/2011 |
| 7790021 | Removal of sulfur-containing compounds from liquid hydrocarbon streams An improved method for desulfurizing a fuel stream such as a diesel stream is disclosed which includes generation of a sulfone oil, the desulfurization of the sulfone oil and the recycling of the resulting biphenyl-rich stream and ultra-low sulfur diesel streams. Th... | 09/07/2010 |
| 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 |
| 7326822 | Method for treating sour gas Metal hydride compounds, which are prepared by mixing together from about 1 to about 10 parts by molecular weight of at least one metal selected from the group consisting of silicon, aluminum, tin, and zinc; from about 1 to about 3 parts by molecular weight of an al... | 02/05/2008 |
| 7244352 | Selective hydroprocessing and mercaptan removal A process for producing a naphtha having a decreased amount of sulfur by selective hydroprocessing a petroleum feedstream comprising cracked naphtha to reduce its sulfur content with minimum loss of octane. The reduced sulfur naphtha stream contains mercaptan sulfur... | 07/17/2007 |
| 7223332 | Reactor and process for mercaptan oxidation and separation in the same vessel The present invention is an apparatus and process for oxidizing mercaptans in a preferably kerosene stream. By using a catalyst promoter, sufficient separation of hydrocarbon and aqueous alkali occurs in the reactor vessel to obviate the need for a settling tank. He... | 05/29/2007 |
| 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 |
| 7192516 | Desulfurization of petroleum streams using metallic sodium The invention is a method of removing sulfur from a hydrocarbon feed using the steps of dissolving metallic sodium in a solvent and combining the sodium/solvent solution with a liquid hydrocarbon feed containing an organosulfur species. The pressure of combination i... | 03/20/2007 |
| 7166290 | Methods for producing oocysts The present invention provides improved methods and compositions for producing oocysts. The oocysts produced according to the invention find use in the manufacture of vaccines. In preferred embodiments, the present invention provides methods and compositions for the... | 01/23/2007 |
| 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 |
| 7022655 | Highly polar cleans for removal of residues from semiconductor structures Supercritical carbon dioxide may be utilized to remove resistant residues such as those residues left when etching dielectrics in fluorine-based plasma gases. The supercritical carbon dioxide may include an ionic liquid in one embodiment. ... | 04/04/2006 |
| 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 |
| 6860999 | 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 treatm... | 03/01/2005 |
| 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 |
| 6767452 | Process for treatment of petroleum acids The invention is a process for decreasing the acidity of an organic acid containing petroleum oil, comprising contacting said petroleum oil containing organic acids with an effective amount of an alcohol and an effective trace amount of a base selected from Group IA... | 07/27/2004 |
| 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 |
| 6743961 | Olefin production utilizing whole crude oil A method for utilizing whole crude oil as a feedstock for the pyrolysis furnace of an olefin production plant wherein the feedstock after preheating is subjected to mild cracking conditions until substantially vaporized, the vapors from mild cracking being subjected... | 06/01/2004 |
| 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 |
| 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 |
| 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 |
| 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 |
| 6190541 | Process for treatment of petroleum acids (LAW824) The invention is a process for decreasing the acidity of an organic acid containing petroleum oil, comprising contacting said petroleum oil containing organic acids with an effective amount of an alcohol and an effective trace amount of a base selected fr... | 02/20/2001 |
| 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 |
| 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 |
| 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 |
| 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 |
| 5904839 | Process for upgrading heavy oil using lime The present invention relates to a continuous in-situ process for reducing the viscosity, corrosivity and density of heavy oils comprising the steps of (a) contacting a heavy oil with an anhydrous alkaline earth, Group IIA metal hydroxide and low pressure... | 05/18/1999 |
| 5865989 | Process for sweetening liquid hydrocarbons A process for sweetening high mercaptan content gasoline or other liquid hydrocarbons is disclosed which utilizes aqueous caustic solution. A recycle stream is used to increase the conversion potential by reducing the relative mercaptan concentration of t... | 02/02/1999 |
| 5858212 | Desulfurization and hydrocarbon quality enhancement process A hydrocarbon stream containing sulfur and sulfur compounds is contacted with a water suspension of dolomitic lime and dibasic acid catalyst in a reaction vessel in order to transfer the sulfur and sulfur compounds from the petroleum vapor to the water ph... | 01/12/1999 |
| 5820766 | Reduction of sulfide in fluids A composition and a process for substantially reducing or removing sulfide from a sulfide-containing fluid are disclosed. The composition comprises, or is prepared by combining components comprising, a sulfide-containing fluid and a sulfide-scavenging amo... | 10/13/1998 |
| 5674378 | Dynamic mixer process with continuous caustic phase for removal of elemental sulfur from organic fluids The present invention is directed to a process for the removal of elemental sulfur from fluids such as fuels, e.g. gasoline, kerosene, diesel or jet, by contacting said fluids with an immiscible treatment solution comprising water or immiscible alcohol, c... | 10/07/1997 |
| 5611910 | Method for reducing sulfur emissions in processing air-blown asphalt In a method for reducing emissions from an asphalt blowing process, an emission reducing additive is added to the asphalt prior to blowing, or early in the blowing process. The emission reducing additive is added in an amount sufficient to reduce the SO | 03/18/1997 |
| 5601700 | Scavenging of hydrogen sulphide A method for the removal of hydrogen sulphide from a hydrocarbon-water mixture. The method utilizes a sulphite or a bisulphite, preferably ammonium bisulphite. It may be added as a salt or in solution. It is used in amounts by weight of from 2:1 salt: hyd... | 02/11/1997 |
| 5525233 | Process for the removal of elemental sulfur from fluids by mixing said fluid with an immiscible solution of alcoholic caustic and an inorganic sulfide or hydrosulfide A process for removing elemental sulfur from fluids such as refined petroleum products transported through pipelines normally used for the transport of sour hydrocarbon streams. The sulfur containing fluids are mixed with an immiscible aliphatic solution ... | 06/11/1996 |
| 5525211 | Selective hydrodesulfurization of naphtha using selectively poisoned hydroprocessing catalyst Naphtha is selectively hydrodesulfurized using selectively poisoned hydrotreating catalyst to remove sulfur while minimizing loss in octane level due to olefin saturation.... | 06/11/1996 |
| 5441630 | Hydrodesulfurization process Hydrodesulfurization of a cracked naphtha is effected in the presence of, as catalyst, a non-noble metal of Group VIII and a metal of Group VI-B on an alumina support containing a hydrotalcite-like composition. The process of the instant invention gives h... | 08/15/1995 |
| 5364524 | Process for treating heavy oil A process for treating heavy oil by contacting the oil with hydrogen in a reactor containing an activated carbon catalyst having a specified range of Alpha value, and average pore diameter, and pore distribution, to reduce the content of nickel and vanadi... | 11/15/1994 |
