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| Number | Title | Issue Date |
| 7311891 | Process for the recovery of sulfur from Claus tail gas streams Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a ... | 12/25/2007 |
| 7291271 | Meso-frequency traveling wave electro-kinetic continuous adsorption system The invention provides a non-cyclic, meso-frequency traveling wave electro-kinetic system capable of use in purification/separation and/or refrigeration/heat pump processes. In particular, the invention provides an adsorption system that can be used for fine or bulk... | 11/06/2007 |
| 7153413 | Gasoline sulfur reduction in fluid catalytic cracking The sulfur content of liquid cracking products, especially the cracked gasoline, is reduced in a catalytic cracking process employing a cracking catalyst containing a high content of vanadium. The cracking process involves introducing at least one vanadium compound ... | 12/26/2006 |
| 7148389 | Selective sorbents for purification of hydrocartons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 12/12/2006 |
| 7094333 | Selective sorbents for purification of hydrocarbons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 08/22/2006 |
| 7053256 | Selective sorbents for purification of hydrocarbons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 05/30/2006 |
| 7029574 | Selective sorbents for purification of hydrocarbons A method for removing thiophene and thiophene compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the thiophene and thiophene compounds. The adsorption takes place at a selected temperature and pressure, ther... | 04/18/2006 |
| 6908497 | Solid sorbents for removal of carbon dioxide from gas streams at low temperatures New low-cost CO2 sorbents are provided that can be used in large-scale gas-solid processes. A new method is provided for making these sorbents that involves treating substrates with an amine and/or an ether so that the amine and/or ether comprise at least... | 06/21/2005 |
| 6875410 | Adsorbent for removing sulfur compounds from fuel gases and removal method An adsorbent for removing sulfur compounds from sulfur compounds-containing fuel gas contains a zeolite ion-exchanged with Ag and has an excellent performance when used to remove sulfur compounds from the fuel gas, irrespective of the moisture concentration in the f... | 04/05/2005 |
| 6274107 | Zeolite-containing oxidation catalyst and method of use Oxidation catalyst compositions for treating diesel exhaust include ceria and, optionally, alumina, each having a surface area of at least about 10 m2 /g, and a zeolite, e.g., Beta zeolite. Optionally, platinum may be included in the catalytic ... | 08/14/2001 |
| 6083473 | Selective oxidation catalyst, preparation and use thereof A catalyst for selective oxidation of sulfur-containing compounds comprising a metal of Group VIIIA which forms an active metal oxide supported on a support comprising a laminar phyllosilicate, alone, or in combination with silica or alumina. Laminar phyl... | 07/04/2000 |
| 5609842 | Zeolitic desulfuring agents and their application in the processing of gasses containing notable CO2 proportions It is now possible to desulfurize gases containing appreciable carbon dioxide proportions by limiting the production of carbon oxysulfide to a very low level, by treating these gases with adsorbents composed of very small, partially calcic zeolite A cryst... | 03/11/1997 |
| 5512260 | Reduction of sulfur content in a gaseous stream A process for reducing sulfur content in a gaseous stream with the production of elemental sulfur by first treating the gaseous steam with hydrogenation and hydrolysis to convert substantially all of the sulfur components therein to hydrogen sulfide. Then... | 04/30/1996 |
| 5447701 | Gas purification method An adsorbent comprising a sepiolite and a zeolite, especially silicalite and a zeolite-containing adsorptive decomposition composition comprising the adsorbent and a catalyst component supported thereon are disclosed. A method of deodorizing which comprising u... | 09/05/1995 |
| 5439659 | Method for treating exhaust gas and an apparatus therefor A powdery adsorbent is mixed with an exhaust gas containing fine particles and a noxious and malodorous gas component in gas pipelines, adhering the fine particles to the powdery adsorbent and adsorbing the noxious and malodorous gas with the powdery adso... | 08/08/1995 |
| 5422332 | Processes for reacting bastnaesite with metal oxides Bastnaesite materials and Mg[A] (and/or Al[B]) materials can be chemically reacted by use of reactions wherein a Al[B] ingredient such as alumina is made into a sol by use of a mono-protonic acid before Mg[A] (and/or Al[B]) materials is (are) reacted with... | 06/06/1995 |
| 5401391 | Desulfurization of hydrocarbon streams A process for desulfurizing a hydrocarbon stream which includes at least 100 ppmw sulfur in the form of organic sulfur compounds, and C4 -hydrocarbons. The hydrocarbon stream is contacted in the absence of added hydrogen with a fluidized bed of... | 03/28/1995 |
| 5399327 | SOx control compositions A composition comprising a coprecipitated magnesia-lanthana-alumina (MgO--La2 O3 --Al2 O3) wherein the MgO component is present as microcrystalline phase, having a BET (N2) surface area of at least 13... | 03/21/1995 |
| 5223237 | Process for removing sulfur oxides from a gas stream A process for removing the sulfur oxides from a gas stream by sorbing the sulfur oxide gases in a zeolite and subsequently purging the previously-sorbed sulfur oxide gases by exposing the zeolite to water or water vapor, which is preferentially sorbed on ... | 06/29/1993 |
| 5146039 | Process for low level desulfurization of hydrocarbons A hydrocarbon containing sulfides, disulfides, trisulfides, tetrasulfides or mixtures can be desulfurized by contacting the hydrocarbon with a zeolite containing copper, silver, zinc or mixtures thereof.... | 09/08/1992 |
| 5139757 | Process for the removal of nitrogen oxides from flue gases Process for the removal of nitrogen oxides in hot flue gas by catalytic reduction with a reducing agent, which process comprises continuously introducing the flue gas into a section of a sectional divided denitration catalyst unit countercurrently with fr... | 08/18/1992 |
| 5002742 | Inorganic oxide sorbents for sulfur oxides Alkali metal and alkaline earth metal containing silica alumina spinel-mullite-gamma alumina sorbents which may be used to remove sulfur oxides (SOx components) from gas streams.... | 03/26/1991 |
| 4999175 | Process for selective adsorption of sulfur compounds from gaseous mixtures containing mercaptans A process for separating sulfur-containing compounds other than mercaptans from gaseous streams. A gaseous stream including mercaptans and other sulfur-containing compounds is brought into contact with a solid supporting material coated with a thin layer ... | 03/12/1991 |
| 4937058 | Catalytic oxidation of sulfur compounds Sulfur containing organics, e.g., carbon disulfide carbon oxysulfide, or a mercaptan, are oxidized to sulfur dioxide in gaseopus phase, whether alone or conjointly with hydrogen sulfide and/or elemental sulfur, per se, by passing a gaseous stream thereof,... | 06/26/1990 |
| 4874590 | Catalytic reduction of nitrogen oxides This invention relates to a method for catalytically reducing one or more nitrogen oxides from a gaseous stream containing one or more nitrogen oxides and one or more sulfur oxides which comprises contacting said gaseous stream and ammonia with a micropor... | 10/17/1989 |
| 4867954 | Catalytic reduction of nitrogen oxides This invention relates to a method for catalytically reducing one or more nitrogen oxides from a gaseous stream containing one or more nitrogen oxides and optionally one or more sulfur oxides which comprises contacting said gaseous stream and ammonia with... | 09/19/1989 |
| 4830733 | Integrated process for the removal of sulfur compounds from fluid streams The present invention relates to a new and integrated process involving the utilization of a primary adsorption bed containing a regenerable, physical adsorbent and an auxiliary sorption bed containing a chemisorbent for the removal of sulfur compounds fr... | 05/16/1989 |
| 4828680 | Catalytic cracking of hydrocarbons Combustible carbonaceous particles such as particles of sponge coke or coal are incorporated with the circulating inventory of cracking catalyst in a fluid catalytic cracking unit. The carbonaceous particles selectively sorb metal contaminants in the feed... | 05/09/1989 |
| 4589978 | Catalyst for reduction of SOx emissions from FCC units SOx emission control from a catalytic cracking regenerator unit is improved by using a SOx transfer catalyst which has improved SOx adsorption capacity and which consists essentially of cerium or cerium and lanthanum or co... | 05/20/1986 |
| 4522793 | Removing H2 S from natural gas using two-stage molecular sieves An integrated process for removal of hydrogen sulfide and water from a natural gas stream by contacting a natural gas stream containing hydrogen sulfide, water, and CO2 with molecular sieves that act both as an adsorbent for hydrogen sulfide an... | 06/11/1985 |
| 4430303 | Removal of undesirable gaseous components from a hot waste gas In a process for the removal of sulfur dioxide and nitrogen oxides, the waste gas is cooled and scrubbed with a physical absorbent selective for sulfur dioxide. The nitrogen oxides are catalytically removed from the waste gas by reaction with ammonia, whi... | 02/07/1984 |
| 4423019 | Process for removing sulfur oxides from a gas Sulfur oxides are removed from a gas by an absorbent which comprises a physical mixture of (1) a particulate cracking catalyst comprising from about 0.5 to about 50 weight percent of a crystalline aluminosilicate zeolite which is distributed throughout a ... | 12/27/1983 |
| 4376103 | Removing sulfur oxides from a gas Sulfur oxides are removed from a gas with absorbents and then are removed from the absorbents by contact with a hydrocarbon in the presence of a cracking catalyst. The absorbents comprise an exhaustively-exchanged rare-earth-form zeolite and a free form o... | 03/08/1983 |
| 4369130 | Composition for removing sulfur oxides from a gas Sulfur oxides are removed from a gas by an absorbent comprising at least one inorganic oxide selected from the group consisting of the oxides of aluminum, magnesium, zinc, titanium, and calcium in association with at least one free or combined rare earth ... | 01/18/1983 |
| 4322394 | Adsorbent regeneration and gas separation utilizing microwave heating Dielectric heating with microwaves of saturated solid noncarbon adsorbents to remove the adsorbed materials results in more rapid, efficient and safe regeneration than conventional heating. The microwaves heat the adsorbents internally and in the absence ... | 03/30/1982 |
| 4311581 | Process for reducing CO and SOx emissions from catalytic cracking units Reduction of CO and SOx emissions from regenerators associated with cyclical fluidized catalytic cracking (FCC) units used to convert hydrocarbon feedstocks into more valuable products is achieved by introducing particles of bastnaesite into th... | 01/19/1982 |
| 4259176 | Restricting silica content of catalyst inventory to prevent alumina poisoning for SOx control Removal of sulfur oxides from cracking catalyst regenerator flue gas using particulate alumina is enhanced by employing a zeolitic cracking catalyst containing little or no silica in the catalyst matrix.... | 03/31/1981 |
| 4255251 | Hydrocracking process and catalyst A hydrocracking process for the conversion of heavy hydrocarbon oils and a catalyst therefore which comprises a hydrogenating component and a cracking component including a modified crystalline zeolite and at least one amorphous inorganic oxide support ma... | 03/10/1981 |
| 4244937 | Sulfur dioxide oxidation catalyst and process A catalytic process for the oxidation of sulfur-containing gases, e.g., sulfur dioxide and simultaneous production of sulfuric acid wherein a sulfur-containing gas is reacted with an oxygen-containing gas in the presence of a catalyst comprising an iron g... | 01/13/1981 |
| 4243556 | Sulfur oxides control in cracking catalyst In removing sulfur oxides from flue gas in a cracking catalyst regenerator in the presence of a silica-containing particulate catalyst by reacting the sulfur oxides with alumina in a particulate solid other than the catalyst, activity loss in the alumina ... | 01/06/1981 |
