Class 423/224 - By oxidizing or burning component

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes in which the component is removed or changed by
No. of patents: 248
Last issue date: 06/21/2011

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Number	Title	Issue Date
7964170	Method and apparatus for the removal of carbon dioxide from a gas stream The invention provides methods and apparatuses for removing carbon dioxide from a gas stream. In particular, the invention provides methods and apparatuses for absorbing carbon dioxide from a coal-fired boiler flue gas stream using an absorbing solution and for rege...	06/21/2011
7935324	Integrated warm gas desulfurization and gas shift for cleanup of gaseous streams The present invention involves a catalytic process for purifying a gas stream comprising purifying the gas stream at a temperature from about 250° to 550° C. by removing sulfur compounds and including a gas shift reaction to convert carbon monoxide to carbon dioxi...	05/03/2011
7695701	Process for treating acid gas in staged furnaces with inter-stage heat recovery A process for treating acid gas comprising hydrogen sulfide comprises introducing a first acid gas into a reducing furnace to produce a first oxidized gas stream, cooling the first oxidized gas stream in a first heat recovery system, introducing the cooled gas strea...	04/13/2010
7608231	Process for the continuous removal of hydrogen sulfide from gaseous streams Process for the removal in continuous of hydrogen sulfide from gaseous streams containing it, comprising: a) putting a gas containing H2S in contact with an oxidizing acid aqueous solution of ferric nitrate and containing a heteropolyacid having redox pro...	10/27/2009
7378068	Electrochemical process for decomposition of hydrogen sulfide and production of sulfur The present invention includes a process for the removal of hydrogen sulfide from hydrogen sulfide gas containing gaseous streams. In one embodiment, the process comprises feeding a sulfide ion containing solution to an oxidation unit. The method further comprises f...	05/27/2008
7354560	Process for the production of hydrogen Process for the removal of organic and/or inorganic sulfur from an ammonia stream by passing said stream through a fixed bed of sulfur absorbent in a sulfur absorber and withdrawing a sulfur-free ammonia stream, wherein said sulfur absorbent is a catalyst having a t...	04/08/2008
7204967	Waste water process with scrubber An apparatus and method for treating waste products produced by chemical processing plants. Steam stripping waste sour water results in a vapor including ammonia and hydrogen sulfide. A scrubber unit including a quenching column produces a concentrated ammonium sulf...	04/17/2007
7147783	Method for reducing hydrogen sulfide emissions from wastewater A cost-effective method for reducing the dissolved sulfide content in a wastewater stream and thereby hydrogen sulfide emissions therefrom involving the steps of adding a transition metal salt to the wastewater stream at the upper reaches of a wastewater collection ...	12/12/2006
7074033	Partially-open fired heater cycle providing high thermal efficiencies and ultra-low emissions A partially open fired heater regenerative cycle wherein the fired industrial type heater cycle's heat transfer fluid replaces the air predominant nitrogen heat transfer fluid employed in a conventional air/fuel combustion heater. The heater cycle's method and appar...	07/11/2006
7060233	Process for the simultaneous removal of sulfur and mercury A process for removing hydrogen sulfide, other sulfur-containing compounds and/or sulfur and mercury from a gas stream contaminated with mercury, hydrogen sulfide or both. The method comprises the step of selective oxidation of hydrogen sulfide (H2S) in a...	06/13/2006
7037434	Integrated water treatment and flue gas desulfurization process A water stream containing hardness minerals is subjected to a water treatment process using an alkali agent to precipitate the hardness minerals and to produce a softened water stream is used to create an integrated water treatment and flue gas desulfurization proce...	05/02/2006
7022297	Method and system for purifying or cleansing a gas stream or gaseous body A method and system for eliminating, in whole or in part, contaminants in a gas stream or gaseous body such as air or an exhaust gas or gas emission stream is provided. The method includes the steps of contacting the gas stream or gaseous body with a biocide contain...	04/04/2006
7011907	Secondary battery cathode active material, secondary battery cathode and secondary battery using the same A cathode active material for a lithium-ion secondary battery includes a spinel lithium manganese composite oxide expressed by the general formula: Lia(NixMn2−x−q−rQqRr)O4, wherein 0.4≦x≦0.6...	03/14/2006
6989142	Precipitated calcium carbonate An abrasive precipitated calcium carbonate is provided that provides excellent cleaning properties without being excessively abrasive or damaging to gums or tooth surfaces. The abrasive, precipitated calcium carbonate has a primary particle size of about 1 μm to ab...	01/24/2006
6949230	Solid state oxygen anion and electron mediating membrane and catalytic membrane reactors containing them This invention relates to gas-impermeable, solid state materials fabricated into membranes for use in catalytic membrane reactors. This invention particularly relates to solid state oxygen anion- and electron-mediating membranes for use in catalytic membrane reactor...	09/27/2005
6926829	Apparatus and method for separating fluids through a membrane Apparatus for contacting first and second fluids at elevated pressures with a membrane such that one or more components of one of the fluids passes through the membrane into the other fluid, comprising a housing e.g. a pressure vessel (4), and a membrane modu...	08/09/2005
6919059	Process and apparatus for recovering sulphur from a gas stream containing sulphide Oxygen or oxygen-enriched air is employed to support combustion in furnaces (16) and (26) of part of the hydrogen sulphide content of a first feed gas stream. Sulphur vapour is extracted in condenser (32) from the resulting gas mixture so as to ...	07/19/2005
6902713	Method for partially oxidizing a gas stream comprising hydrogen sulphide and ammonia A method for partially oxidizing, in a Claus furnace, at least one gas containing hydrogen sulfide and ammonia with at least one gas rich in oxygen. The residual ammonia content at the outlet of the furnace is measured with a laser diode. Based upon this measurement...	06/07/2005
6893620	Process and apparatus for recovering sulphur from a gas stream containing hydrogen sulphide Oxygen or oxygen-enriched air is employed to support combustion in furnace (16) of part of the hydrogen sulphide content of a first feed gas stream. Sulphur is extracted from the resulting gas stream in a sulphur condenser (26). Catalyst Claus reaction...	05/17/2005
6849571	Catalyst for selectively oxidizing carbon monoxide A catalyst (5) for selectively oxidizing carbon monoxide, wherein a noble metal (3) and an active oxygen supply material (4) capable of oxidizing carbon monoxide are supported on a substrate (6). Favorable selective oxidation of carbon mo...	02/01/2005
6776974	Process for the production of sulfur A process is provided for producing elemental sulfur from hydrogen sulfide contained in an acid gas feed stream wherein hydrogen sulfide and sulfur dioxide are reacted in a catalytic only sulfur recovery unit comprising a single catalytic converter containing a Clau...	08/17/2004
6645459	Method of recovering sulfurous components in a sulfur-recovery process H2 S is removed from an H2 S-rich gas, and sulfur is produced, by a process in which the H2 S-rich gas is reacted with SO2 in a reactor in the presence of an organic solvent and a catalyst, an H2 S-co...	11/11/2003
6641626	Mixed ionic and electronic conducting ceramic membranes for hydrocarbon processing The invention relates to mixed phase materials for the preparation of catalytic membranes which exhibit ionic and electronic conduction and which exhibit improved mechanical strength compared to single phase ionic and electronic conducting materials. The ...	11/04/2003
6579506	Treatment of gas streams containing reduced sulfur compounds Gas streams containing non-condensible gases (NCG's) including reduced sulfur compounds, such as hydrogen sulfide, dimethyl sulfide, dimethyl disulfide and mercaptans, are treated to remove the NCG's from the gas stream. Following an optional initial gas-...	06/17/2003
6517803	Highly crystalline Mn2O3 or Mn3O4 manganese oxides The present invention includes lithium manganese oxide spinel compounds having a low porosity, a high tap density and a high pellet density, and methods of preparing these compounds. In particular, the method comprises preparing a lithium manganese oxide ...	02/11/2003
6503471	Process for malodorous gas treatment Malodorous gases such as amines, organosulfur compounds, hydrogen sulfide, styrene and aldehydes are economically and efficiently treated at ambient temperature and pressure by a catalytic absorption and oxidation process comprising: (a) bringing the malo...	01/07/2003
6485697	Methods for removing sulfur containing compounds and carbon dioxide from gas mixtures Process for the removal of carbon dioxide (CO2) and minor sulfur compounds--mainly hydrogen sulfide (H2 S)--from a sour gas mixture, such as natural gas, iron ore reduction gas, etc. The process uses a continuous absorption process w...	11/26/2002
6383261	Process for management of industrial wastes The present invention provides a process for the management of H2 S containing gas streams and high alkalinity water streams in which process the H2 S is selectively removed from the gas stream and combusted to form an SO2...	05/07/2002
6375907	Hydrogen sulfide abatement with scale control and/or well acidizing The emissions of hydrogen sulfide during the production of natural gas, oil or geothermal fluids from subterranean formations and the subsequent processing of these fluids is reduced by converting the hydrogen sulfide into a hydrogen halide or a halogen a...	04/23/2002
6355219	Nickel-alumina aerogel catalyst for carbon dioxide reforming of methane and the preparation method thereof The present invention relates to a method of containing nickel into the alumina aerogel prepared by sol-gel method and supercritical drying and of preparing the nickel-alumina hybrid aerogel catalyst. The nickel-alumina catalyst prepared in the present in...	03/12/2002
6328940	Process for partial oxidation of a gas stream containing hydrogen sulphide Process for partial oxidation in a Claus furnace of at least one gas stream having hydrogen sulphide, and including the steps of: (a) injecting at least one gas stream including hydrogen sulphide and at least one oxygen-enriched gas stream into the Claus ...	12/11/2001
6289988	Process for management of industrial wastes The present invention provides a process for the management of H2 S containing gas streams and high alkalinity water streams in which process the H2 S is selectively removed from the gas stream and combusted to form an SO2...	09/18/2001
6083466	Process for partial oxidation of a gas stream containing hydrogen sulphide Process for partial oxidation in a Claus furnace of at least one gas stream comprising hydrogen sulphide, comprising the steps of: (a) injecting at least one gas stream comprising hydrogen sulphide and at least one oxygen-enriched gas stream into the Claus fur...	07/04/2000
6083472	Method for continuously producing thiosulfate ions A process is provided for the removal of hydrogen sulfide out of a gas stream by contacting the hydrogen sulfide contaminated gas with a solution of chelated metal catalyst, such as iron EDTA, in a scrubbing vessel so as to result in a cleaned gas and a s...	07/04/2000
6068822	Desulforization method and desulfurization apparatus in geothermal power plant An uncondensed gas in steam discharged from a turbine in a geothermal power plant and separated from water with a condenser is treated by a desulfurization method comprising the combustion step of combusting the uncondensed gas in the steam to convert hyd...	05/30/2000
6033640	Method for the reagentless removal of nitrogen oxides from exhaust streams The method for the reagentless removal of nitrogen oxides from oxygen rich exhaust streams which includes impinging the exhaust gases upon a catalyst which includes a Lewis base metal cation, bismuth oxide and a mixture of transition metal cations....	03/07/2000
6030494	Method of treating melodorous gases of a pulp mill A method is provided for reducing emissions of harmful nitrogen compounds from a pulp mill (e.g. kraft mill) having malodorous gases which include ammonia and reduced sulphur compounds therein. The method is practiced by (a) treating the pulp mill malodor...	02/29/2000
6019953	Process for gas incineration There is provided a process for the incineration of gases containing sulphur compounds by contacting these gases with an oxygen-containing gas in the presence of a catalyst composition comprising (i) a metal selected from bismuth, molybdenum and chromium ...	02/01/2000
6017501	Disposal of hydrogen sulfide gas by conversion to sulfate ions in an aqueous solution A process is provided for disposing of hydrogen sulfide contained in a gas stream, wherein a first gas feed stream having a hydrogen sulfide gas component, a second gas feed stream having an oxygen gas component, and an aqueous liquid feed stream are comb...	01/25/2000
5989513	Biologically assisted process for treating sour gas at high pH A process for biologically enhancing an iron-based redox process for catalytic oxidation of a sulfide compound such as hydrogen sulfide from a gas in a redox system wherein said catalyst comprises a ferric compound and at least one organic chelant capable...	11/23/1999

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Class 423/224 - By oxidizing or burning component