Class 423/404 - Catalyst is metal oxide

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes wherein the catalyst contains the oxide of a metal.
No. of patents: 30
Last issue date: 09/02/2008

Number	Title	Issue Date
7419647	Hydrothermally stable Ag-zeolite traps for small olefin hydrocarbon molecules A hydrocarbon trap comprises an Ag-zeolite which is heated by a unique steaming regimen. ...	09/02/2008
7338917	Purification catalyst for exhaust gas A purification catalyst for exhaust gas enhances the activity for each precious metal by effectively utilizing the precious metal without incurring a high production cost, thereby improving endurance. The purification catalyst for exhaust gas comprises a composite o...	03/04/2008
7192566	Process for the catalytic decomposition of NO to Nand Ocarried out at high temperature The invention relates to a process for the catalytic decomposition of N2O to N2 and O2. This process is carried out at a high temperature, generally of between 700 and 1000° C., at a high HSV and in the presence of a catalyst...	03/20/2007
6827917	Process for oxidation of ammonia A catalyst for oxidation reactions, particularly the oxidation of ammonia comprises oxides of (a) at least one element A selected from rare earths and yttrium, and (b) cobalt and element A being in such proportions that the element A to cobalt atomic ratio is in the...	12/07/2004
6534029	Method and apparatus for producing nitric oxide In the method of preparing nitric oxide by burning NH3 with oxygen, over a catalyst network in which the reaction product gases contain N2 O and are cooled, the N2 O is eliminated by oxidation or decomposition by immediate...	03/18/2003
6451278	Method of converting ammonia The invention relates to processes for high-temperature catalytic conversion of ammonia in a two-stage catalytic system in which the first stage, in the downstream direction of the flow of gas comprising at least ammonia and oxygen, is a layer of nettings...	09/17/2002
6322766	Preparation of oxides of nitrogen having a low degree of oxidation In a process for preparing oxides of nitrogen having a low degree of oxidation by catalytic oxidation of ammonia, ammonia mixed with air and water vapor is oxidized over an oxidation catalyst....	11/27/2001
6312657	Production of nitrous oxide A process for producing nitrous oxide comprises reacting ammonia with nitric oxide and/or oxygen in the presence of a catalyst comprising a Group VIB metal oxide, to produce a reaction mixture comprising nitrous oxide, and optionally recovering the nitrou...	11/06/2001
6030594	Catalyst A catalyst unit for use in an exothermic reaction, such as ammonia oxidation, comprises a material effective as a catalyst for said reaction having a shape conforming to a disc or cone having a plurality of radially extending corrugations. The catalyst un...	02/29/2000
6002059	Process for upgrading natural gas The invention discloses a method for converting methane to higher order hydrocarbons. This method includes synthesizing ammonia from natural gas and nitrogen in the presence of a source of hydrogen. The ammonia is converted to nitrous oxide in the presenc...	12/14/1999
5849257	Process for preparation of nitrous oxide A process for preparation of nitrous oxide, wherein ammonia is reacted with oxygen in the presence of steam using a copper-manganese oxide catalyst having diffraction angles measured by X-ray diffraction analysis of about 36°, about 58° and about 64°; ...	12/15/1998
5656567	Self-gettering catalysts A catalyst unit (16), in which a quantity of a relatively expensive material such as platinum is replaced by a greater quantity of a relatively inexpensive material such as palladium. Thus, material cost saved by "tailoring" a pack is used to pay for a la...	08/12/1997
5266291	Packed bed arrangement for oxidation reaction system The present invention relates to processes and apparatus for mixing oxidizable reactants with oxidant and oxidizing oxidizable reactants. When ammonia is used as the reactant, nitric acid can be obtained. Through using particular mixing and oxidizing arra...	11/30/1993
5160722	Low pressure drop, high surface area ammonia oxidation catalyst This invention is a catalytic element for use in the catalytic oxidation of ammonia. The element comprises a foraminous structure fabricated from a material consisting essentially of a metal selected from the group consisting of platinum, rhodium, palladi...	11/03/1992
5082645	Waste acid recovery process A process for the recovery of sulphuric acid from a waste acid stream containing ammonium sulphate comprising vaporizing the waste acid and subsequently converting the ammonia and sulphur dioxide generated to nitrogen and sulphur trioxide, respectively. T...	01/21/1992
5041276	Ammonia oxidation Lithia doped cobalt oxide ammonia oxidation catalyst having a lithium to cobalt atomic ratio in the range 0.6 to 1.5....	08/20/1991
4812300	Selective perovskite catalysts to oxidize ammonia to nitric oxide The present invention relates to perovskite mixed metal catalysts useful for the selective oxidation of ammonia to nitric oxide. In one aspect, the invention relates to a perovskite mixed metal catalyst of the general formula: ABO3 wherein: A i...	03/14/1989
4692321	Oxidation of ammonia over a mixed catalyst bed of cobalt and aluminum oxides This invention is a catalyst and method of oxidizing ammonia by contacting the ammonia and air with catalyst of cobalt oxide, wherein the improvement comprises using activated alumina in conjunction with the cobalt oxide catalyst....	09/08/1987
4512794	Manufacturing and using nitrogen fertilizer solutions on a farm To make non-pressure nitrogenous fertilizer solutions, nitrogen oxides are prepared in a continuous process by burning ammonia in contact with a cobalt oxide catalyst started by an electric arc without pre-heating the gases. This burning forms nitrogen ox...	04/23/1985
4419274	Nonmetallic catalyst compositions for oxidation of ammonia and process for making the catalyst Nonmetallic catalyst compositions for oxidation of ammonia have the formula of Fe2 O3 -MAl2 O4 -Bi2 O3 -Ce2 O3. Herein, M represents Mg, Mn, Ca, Sr or Ba. MAl2 O...	12/06/1983
4389339	Process for making a cobalt oxide catalyst A process for preparing an improved cobalt oxide catalyst for ammonia oxidation comprising decomposing a cobalt compound such as basic cobalt carbonate by heating to form cobalt oxide, then saturating the cobalt oxide with cobalt nitrate solution and rehe...	06/21/1983
4308246	Fixation of nitrogen using silicon oxide catalysts A process for the fixation of nitrogen comprising, combining a gaseous nitrogen and oxygen at a total pressure of above 100 atmospheres with a solid oxide which can produce a nitrate, in the presence of an oxide of silicon catalyst for the acceleration of...	12/29/1981
4271137	Fixation of nitrogen A process for the fixation of nitrogen comprising, combining a gaseous nitrogen and oxygen at a total temperature of about 100 atmospheres with a solid oxide which can produce a nitrate, in the presence of a catalyst for the acceleration of a reaction bet...	06/02/1981
4124687	Process for the oxidation of ammonia to nitrous oxide A process for the oxidation of ammonia to nitrous oxide in the presence of elemental nitrogen with minimal oxidation thereof which comprises combining the ammonia with a predetermined amount of oxygen containing gas to give at least 1% stoichiometric exce...	11/07/1978
4102986	Process for the continuous manufacture of nitrous oxide Nitrous oxide (laughing gas) is produced by continuous decomposition of ammonium and nitrate ions fed into an aqueous, strongly acid reaction liquor containing chloride ion as catalyst. N2 O and water are continuously removed. Preferred paramet...	07/25/1978
4036935	Cobalt oxide-based catalytic substances for the oxidation of ammonia The invention concerns catalytic substances for the oxidation of ammonia, for the production of nitric acid, comprising cobalt oxide as the main component. Such substances, besides cobalt oxide, also contain additives formed of aluminum oxide and possibly...	07/19/1977
3985681	Catalyst for the oxidation of ammonia There are provided oxidation catalysts having a specific surface ranging m 12 to 100 m2 /g and containing as their main constituent either an oxide of cobalt or an oxide of bismuth. The catalysts further contain a promoter in the form of a rar...	10/12/1976
3948610	Catalyst beds for oxidizing ammonia to nitrogen oxides A catalyst bed for a reactor for oxidising ammonia in the presence of a particulate catalyst which either comprises a first layer occupying part of the cross-section of the reactor and a second layer downstream of the first layer and shaped to occupy more...	04/06/1976
3947554	Catalytic oxidation of ammonia This invention relates to the catalytic oxidation of ammonia. The catalytic compounds are complex catalysts with limited porosities, with specific surface areas between 0.02 and 2 m2/g, containing an active material bonded by ceramic-type bonds to the ele...	03/30/1976
3931391	Process for oxidation of ammonia Catalysts suitable for the oxidation of ammonia to nitrogen oxides which are suitable to produce nitric acid are prepared by doping cobalt oxide, preferably Co.sub.3 O.sub.4 with 0.1-10 atoms %, preferably 0.5-3 atom % of lithium. In a given case, there i...	01/06/1976

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Class 423/404 - Catalyst is metal oxide