Class 423/239.2 - Zeolite

Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Process in which the treating material contains a zeolite.
No. of patents: 253
Last issue date: 06/28/2011

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Number	Title	Issue Date
7968068	Zeolite catalyst with improved NOx reduction in SCR The present invention is directed to a novel metal-promoted zeolite catalyst, a method of producing the catalyst and a method of using the catalyst for the selective catalytic reduction of NOx with improved hydrothermal durability. The novel metal-promote...	06/28/2011
7939039	Bimetallic catalyst for NOreduction in engine exhaust A catalyst made by the introduction of copper ions and cobalt ions into a Y-type zeolite to produce a CuCoY zeolite improves the reduction of NOx in exhaust from a lean burn engine, such as a diesel engine. A dual bed selective reduction reactor in the exhaust strea...	05/10/2011
7906091	Removal of laughing gas in nitric acid production A method and device for removal of N2O in nitric acid production are disclosed. The device is arranged after a heat exchanger, post ammonia burning, before the absorption tower and contains a catalyst, which essentially comprises one or several iron loade...	03/15/2011
7901648	Method for the decomposition of NO, catalyst therefor and preparation of this catalyst The invention relates to a method for the catalytic decomposition of N2O in a gas containing N2O in the presence of a catalyst, wherein the catalyst comprises a zeolite that has been loaded with a first metal selected from the group of noble me...	03/08/2011
7858062	Synthesis and use of nanocrystalline zeolites Embodiments of the present invention relate to a method for synthesizing nanocrystalline zeolites, the method comprising contacting starting products that comprise a solvent, a silicon source, a cation base, an organic template, and an aluminum source, or any combin...	12/28/2010
7794680	Nitrogen oxide-reducing catalyst and method for reducing nitrogen oxide A first catalyst for reducing nitrogen oxides comprising a crystalline silicate containing an iron in β-framework structure wherein a SiO2/Fe2O3 mol ratio is 20-300 and at least 80% of the contained iron is an isolated iron ion Fe	09/14/2010
7704474	Method for the decomposition of NO, catalyst therefor and preparation of this catalyst The invention relates to a method for the catalytic decomposition of N2O in a gas containing N2O in the presence of a catalyst, wherein the catalyst comprises a zeolite that has been loaded with a first metal selected from the group of noble me...	04/27/2010
7704475	Zeolite catalyst with improved NOx reduction in SCR The present invention is directed to a novel metal-promoted zeolite catalyst, a method of producing the catalyst and a method of using the catalyst for the selective catalytic reduction of NOx with improved hydrothermal durability. The novel metal-promoted zeolite i...	04/27/2010
7695703	High temperature catalyst and process for selective catalytic reduction of NOin exhaust gases of fossil fuel combustion A process for producing a stable high-temperature catalyst for reduction of nitrogen oxides in combustion exhaust gases at operating temperatures from 300° C. to over 700° C. without the need for exhaust dilution. A zeolite material is steam-treated at a temperatu...	04/13/2010
7438876	Multi-stage heat absorbing reactor and process for SCR of NOx and for oxidation of elemental mercury A selective catalytic reduction apparatus has at least first and last catalyst layers in series for reducing nitrogen oxides in a flue gas, at least one interstage heat exchanger located after the first layer and before the last layer, that lowers flue gas temperatu...	10/21/2008
7438878	Selective catalytic reduction of NO A gas stream containing nitrous oxide and ammonia is contacted with a catalyst composition containing a zeolite. N2O is reduced to N2 and H2O at low temperatures in a highly efficient manner. Ammonia-mediated reduction of nitrous oxi...	10/21/2008
7413720	Catalyst and method for reduction of nitrogen oxides A Selective Catalytic Reduction (SCR) catalyst was prepared by slurry coating ZSM-5 zeolite onto a cordierite monolith, then subliming an iron salt onto the zeolite, calcining the monolith, and then dipping the monolith either into an aqueous solution of manganese n...	08/19/2008
7405175	Catalyst and method for clarifying exhaust gas A proton type β zeolite is used as catalyst. Nitrogen oxides in the exhaust gas containing excessive oxygen is reduced/removed by making the exhaust gas contact with the catalyst under the existence of methanol and/or dimethyl ether as reducing agent. It is desirab...	07/29/2008
7396517	Reduction of NOx emissions using a staged silver/alumina catalyst system The hydrocarbon-assisted, selective catalytic reduction of NOx constituents in lean-bum engine exhaust is benefited by passage of the exhaust over a staged catalyst bed comprising a first stage of an alumina-supported silver catalyst for oxidation of NO to NO2 ...	07/08/2008
7396793	Exhaust gas purifying catalyst and process for purifying exhaust gas An exhaust gas purifying catalyst contains copper oxide, ZSM-5 and/or zeolite β, and an oxide of magnesium and/or calcium is further added thereto. A process for purifying an exhaust gas using such a catalyst is also included. By using the catalyst, NOx in an exhau...	07/08/2008
7393804	Exhaust gas purifying catalyst and process for purification of exhaust gas An exhaust gas purifying catalyst has a catalytic component including copper, ZSM-5, and β zeolite. This exhaust gas purifying catalyst reduces nitrogen oxides even from low temperature range and exhibits durability even under a thermal load of high temperature.	07/01/2008
7393512	Denitrification method A process for reducing the content of NOx and N2O in gases, in particular in process gases and offgases, which comprises the measures: a) addition of at least one nitrogen-containing reducing agent to the NOx- and N2O-cont...	07/01/2008
7378069	Catalyst and method for reduction of nitrogen oxides A Selective Catalytic Reduction (SCR) catalyst was prepared by slurry coating ZSM-5 zeolite onto a cordierite monolith, then subliming an iron salt onto the zeolite, calcining the monolith, and then dipping the monolith either into an aqueous solution of manganese n...	05/27/2008
7368094	Plasma-assisted NOreduction Ozone, preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor, is added to the hot exhaust gas stream from a lean-burn (oxygen-rich) combustion source. The ozone converts much of the NO in the NOx containing exhaust ...	05/06/2008
7361320	Exhaust gas purification unit with reducing agent supply The invention proposes an exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel engine used in motor vehicles, in which a particulate filter and a SCR cat...	04/22/2008
7357904	Reduction of oxides of nitrogen in a gas stream using molecular sieve SSZ-74 The present invention relates to new crystalline molecular sieve SSZ-74 prepared using a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium)dication as a structure-directing agent, and its use in the reduction of oxides of nitrogen in a gas stream such as the exhaust f...	04/15/2008
7358211	Catalyst for the production of 1,3-propanediol by catalytic hydrogenation of 3-hydroxypropanal A process for preparing a catalyst, comprising sequentially: (a) saturating a TiO2 support with aqueous ruthenium solution; (b) treating the ruthenium saturated TiO2 support with an aqueous base solution; and (c) curing the ruthenium saturated ...	04/15/2008
7320781	Method for adjusting a reductant used in an internal combustion engine to reduce NOx A method for controlling reductant injection into an exhaust stream upstream of a catalyst coupled to an internal combustion engine is disclosed. In the method, an ammonia sensor located downstream of the exhaust catalyst is used to determine ammonia concentration i...	01/22/2008
7319178	Molecular sieve compositions, catalysts thereof, their making and use in conversion processes The invention relates to a catalyst composition, a method of making the same and its use in the conversion of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably ethylene and/or propylene. The catalyst composition comprises a mole...	01/15/2008
7316106	Method for processing combustion exhaust gas containing soot particles and NOx The invention relates to a system and a method for processing exhaust gas of an internal combustion engine such as a diesel engine. The disclosed system and method can be particularly suitable to the diesel engine that usually operates in a lean burn condition witho...	01/08/2008
7304011	Compositions and processes for reducing NOemissions during fluid catalytic cracking Compositions for reduction of NOx generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeoli...	12/04/2007
7285512	Selective hydrodesulfurization catalyst This invention relates to a catalyst and process for selectively hydrodesulfurizing naphtha feedstreams using a catalyst comprising at least one hydrodesulfurizing metal supported on a low acidity, ordered mesoporous support material. ...	10/23/2007
7259121	Method of reducing the NO content of gases and selected catalysts A method of reducing the N2O content in gases is described. A selected zeolite catalyst is used in the method. This catalyst is present in the H form and/or contains exchanged iron and is characterized by the presence of nonlattice aluminum in addition to...	08/21/2007
7238641	Catalyst based on ferrierite/iron for catalytic reduction of nitrous oxide A catalyst for reducing the nitrous oxide content in gas, which operates at relatively low temperatures, the activity of which is relatively insensitive to the presence of water vapor and which is highly resistant to hydrothermal degradation, is prepared from ferrie...	07/03/2007
7238332	Material and process for the filtration of nitric acid and NOfrom streams of air A material for filtering NO2 and nitric acid vapors from air over a wide range of humidities and temperatures including a porous hydrophobic substrate and an amine is provided. ...	07/03/2007
7235222	Process for treating waste anesthetic gas To provide a process and an apparatus for treating a waste anesthetic gas containing a volatile anesthetic and nitrous oxide discharged from an operating room by introducing the gas into an adsorbing cylinder filled with an adsorbent, where the volatile anesthetic c...	06/26/2007
7235221	NOcatalyst and method of suppressing sulfate formation in an exhaust purification system The activity and durability of a zeolite lean-burn NOx catalyst can be increased by loading metal cations on the outer surface of the zeolite. However, the metal loadings can also oxidize sulfur dioxide to cause sulfate formation in the exhaust. The present inventio...	06/26/2007
7226569	Reduction of oxides of nitrogen in a gas stream using molecular sieve SSZ-56 The present invention relates to new crystalline molecular sieve SSZ-56 prepared using a N,N-diethyl-2-methyldecahydroquinolinium cation as a structure-directing agent, methods for synthesizing SSZ-56 and processes employing SSZ-56 in a catalyst. ...	06/05/2007
7225613	Diesel engine after treatment device for conversion of nitrogen oxide and particulate matter An automobile exhaust filter that both traps particulates while altering the concentration of one or more gaseous species is provided. This dual functionality is combined in a single device by utilizing a reactive material that simultaneously alters gaseous componen...	06/05/2007
7220692	Catalyst for selective NOreduction using hydrocarbons A two phase catalyst is disclosed with one or more transition metals such as Cu, Co, Fe, Ag and Mo supported on a molecular sieve having a pore size not greater than 8 Å along with a stabilizing oxide of one or more of the oxides of Zr, Mo, V, Nb or the rare earth...	05/22/2007
7208442	Molecular sieve compositions, catalyst thereof, their making and use in conversion processes The invention relates to a catalyst composition, a method of making the same and its use in the conversion of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably ethylene and/or propylene The catalyst composition comprises a molec...	04/24/2007
7199088	Lubricating oil for a diesel powered engine and method of operating a diesel powered engine A lubricating oil composition useful for a diesel-powered engine is provided that reduces NOx emissions level produced from a diesel-powered engine. The lubricating oil comprises a base oil and at least one oil-dispersible source of HNCO such as isocyanates. A metho...	04/03/2007
7182927	Hydrothermally stable metal promoted zeolite beta for NOreduction The present invention is directed to an iron-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the iron-promoted zeolite beta is treated so as to provide increased amounts of the iron promoter in the ...	02/27/2007
7175821	Reactor and process for reducing emissions of CO and NO The current invention provides systems and method for reducing emissions of gaseous pollutants such as carbon monoxide, nitric oxide and nitrogen dioxide. The invention utilizes at least one catalyst bed and at least one fluidizable bed of sorbent material. The curr...	02/13/2007
7153810	Silver doped catalysts for treatment of exhaust A method of making an exhaust treatment catalyst includes dispersing a metal-based material in a first solvent to form a first slurry and allowing polymerization of the first slurry to occur. Polymerization of the first slurry may be quenched and the first slurry ma...	12/26/2006

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Class 423/239.2 - Zeolite