Class 502/54 - Ammonia or derivative thereof

Subclass of Class 502 - Catalyst, solid sorbent, or support therefor: product or process of making
Definition: Process in which the treating fluid comprises the compound
No. of patents: 35
Last issue date: 07/29/2008

Number	Title	Issue Date
7405174	Process for regeneration of a catalyst that contains an EUO-structural-type zeolite A process for regeneration of a catalyst that comprises at least one EUO-structural-type zeolite in acid form and at least one hydro-dehydrogenating metal, used in a process for isomerization of a hydrocarbon feedstock that comprises aromatic compounds with eight ca...	07/29/2008
7074735	Selectively suppressing catalytic hydrogenation The hydrogenation activity of a heteroatom removal catalyst, having activity for both heteroatom removal and hydrogenation, is selectively suppressed by a treatment which comprises contacting the catalyst with (i) hydrogen, (ii) a selectively deactivating agent that...	07/11/2006
6946030	Method for the production of a silica glass crucible with crystalline regions from a porous silica glass green body A silica glass crucible is produced by a) providing a porous amorphous silica glass green body, which is infiltrated with at least one substance that promotes crystallization of a silica glass crucible, b) drying t...	09/20/2005
6815388	Method for activating passivated iron Passivated iron useful as catalytically active component after activation is activated by hydrogen at elevated temperature and elevated pressure in the presence of a nitrile. ...	11/09/2004
6814878	Process for carrying out a hydrogenation reaction and removing pyrophoric catalyst A batch process for carrying out a hydrogenation reaction comprises mixing a pyrophoric catalyst with reactants and solvents to form a reaction mixture in a reaction vessel. Hydrogen is added to the reaction vessel. After hydrogenation, the desired hydrogenation pro...	11/09/2004
6787496	Supported catalyst treatment There is provided a process for renewing the activity of supported metal catalysts for the hydrogenation of carbon monoxide to form a mixture of hydrocarbons comprising decreasing the hydrocarbon content of the catalyst, preferably by contact with hydrogen-containin...	09/07/2004
6777369	Process for producing catalyst The present invention relates to the effective utilization of a used catalyst containing at least molybdenum, an A element (at least one element selected from the group consisting of phosphorus and arsenic) and an X element (at least one element selected from the gr...	08/17/2004
6777451	Catalyst enhancement A process for enhancing metal catalysts for carbon monoxide hydrogenation comprising reducing the catalyst so that at least a portion is in the metallic state, impregnating under a non-oxidative atmosphere with a solution of a salt of at least one metal, optionally ...	08/17/2004
6753351	Supported catalyst activation A process for activating a supported metal catalyst or catalyst precursor useful for the hydrogenation of carbon monoxide to form a mixture of hydrocarbons, comprising reducing with a hydrogen-containing gas at elevated temperature so that at least a portion is in t...	06/22/2004
6753354	Fischer-tropsch catalyst enhancement There is provided a process for hydrocarbon synthesis wherein a supported metal catalyst for hydrogenating carbon monoxide to form a mixture of hydrocarbons is regenerated by decreasing its hydrocarbon content, impregnating under a non-oxidative atmosphere with a so...	06/22/2004
6573413	Process for activating catalyst for the hydroxylation of aromatics A method for catalytic production of hydroxylated aromatics by exposing zeolite catalyst to a reducing atmosphere to activate said catalyst, and reacting an aromatic with nitrous oxide in the presence of said activated catalyst....	06/03/2003
6074770	Process for operating a methanol reforming apparatus A method for the operation of a methanol reforming apparatus wherein, during the operation of the reforming reaction, methanol is reformed in a methanol reforming reactor using a methanol reforming catalyst. The reforming reaction is interrupted at given ...	06/13/2000
6066586	Process of regenerating solid catalysts A process of regenerating catalysts is carried out by removing precipitates of carbonaceous materials from the catalyst. This process comprises contacting a deteriorated catalyst with a nitrogen oxide gas or a nitrogen oxide-containing gas at a temperatur...	05/23/2000
5877108	Performance of used molybdenum based catalysts by the addition of ammonium dimolybdate A process for regenerating molybdenum containing ammoxidation catalyst comprising replacing the molybdenum loss from the catalyst during the ammoxidation reaction wherein ammonium dimolybdenum is utilized as the source for replacement of the molybdenum lo...	03/02/1999
5378668	Process for reactivating ammoxidation catalysts Molybdenum/bismuth-based fluid-bed catalysts which are used for the ammoxidation of olefins can be reactivated by addition of a mixed oxide of formula Mo20 (P, Cr)0.3-2.0 (Bi, Ni, Fe, Co)1.33-4.0 Ox wherein, besides ...	01/03/1995
5270272	Sulfur removal from molecular-sieve catalyst A sulfur-sensitive catalyst which has been deactivated by accumulating sulfur on the catalyst is desulfurized by contact with ammonia at high temperature. The technique is particularly effective for reforming catalysts containing a large-pore zeolite whic...	12/14/1993
5212302	Process for producing epsilon-caprolactam and activating solid catalysts therefor In the production of &3xb5;-caprolactam from cyclohexanon oxime in gaseous phase in the presence of solid catalysts, the catalysts, no matter whether they may have worked, are brought into contact with either aqueous solution of ammonium salts and at leas...	05/18/1993
5101052	Molybdenum recovery An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by distillation into a propylene fraction, a propylene oxide frac...	03/31/1992
5093509	Removal of trace quantities of molybdenum An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by distillation into a propylene fraction, a propylene oxide frac...	03/03/1992
4977117	Process of presulfurizing and controlling the activity of catalyst for treating hydrocarbons The invention involves a process comprising regenerating a catalyst comprising (a) a support containing at least one oxide of a metal or metalloid and (b) at least one active metal, said process comprising in a first stage treating said catalyst in the ab...	12/11/1990
4744962	Process for the reduction of ammonia in regeneration zone off gas by select addition of NO_x to the regeneration zone or to the regeneration zone off gas A regeneration zone for fluid catalytic cracking contains ammonia (NH3) when the regeneration zone is operated in a partial combustion mode as defined by a content of CO of between 1 and 6 percent by volume. If the ammonia is not removed from t...	05/17/1988
4742032	Neutralization of spent solid phosphoric acid catalyst Spent solid phosphoric acid catalyst is neutralized prior to removal from a reactor vessel to avoid generation of toxic dust or acidic washings during catalyst removal....	05/03/1988
4740491	Process for passivating high activity transition metal sulfide catalysts Catalysts having as their active component sulfides of vanadium, molybdenum and tungsten are contacted with ammonia or with an amine which in aqueous solution has a basic ionization constant greater than that of ammonium hydroxide to suppress deactivation...	04/26/1988
4714689	Process for the regeneration of catalysts for the gas-phase reduction of aromatic nitro compounds Catalysts for the gas-phase reduction of aromatic nitro compounds to aromatic amines are regenerated by treatment of the catalyst, at elevated temperature, with a gas mixture which contains oxygen, inorganic and/or organic amines and/or nitrogen oxides an...	12/22/1987
4650779	Regeneration of pillared clays with gas containing a small amount of ammonia The useful life of a deactivated inorganic pillared clay catalyst or an inorganic pillared clay sorbent saturated with a steam-distillable organic sorbate is extended by adding a small amount of ammonia to the regeneration gas or to the regeneration steam...	03/17/1987
4618593	Process for improving activity of tellurium containing metal oxide catalysts A regeneration process for tellurium-containing metal oxide catalysts used in the process for oxidation, ammoxidation or oxidative dehydrogenation of organic compounds at a temperature of about 300° C. to about 600° C. The process can be effectively app...	10/21/1986
4569754	Selective vaporization process Coke or coke and hydrogen production may increase when the Asphalt Residual Treating (ART) Process for removing metallic and carbonaceous contaminants from hydrocarbons is operated with feed stock containing impurities that result in the deposition on the...	02/11/1986
4551231	Ammonia contacting to passivate metals deposited on a cracking catalyst during reduced crude processing Contaminating metals including nickel, vanadium, iron and copper are deposited on a fluid cracking catalyst during the processing of carbo-metallic containing oils such as residual oils, reduced crudes or topped crudes. These contaminating metals lead to ...	11/05/1985
4550090	Regeneration of ZSM-5 type catalyst with a source of alkali or alkaline earth metal cations or ammonia A novel method is provided for regenerating deactivated crystalline zeolite catalysts at low temperature. The organic residue is contacted with a source of alkali or alkaline earth metal cations, or a source of ammonia, and the organic residue, including ...	10/29/1985
4536483	Process for regeneration of iron-antimony metallic oxide catalysts Iron-antimony metallic oxide catalysts which have become deactivated after being used for the production of aldehydes, acids, nitriles, or dienes through oxidation, ammoxidation, or oxidative dehydrogenation of organic compounds in fluidized-bed reactors ...	08/20/1985
4388279	Recovery of metal values from organic reaction products Trace amounts of catalysts which are present in products resulting from organic reactions, such as rhodium which is present in the alcohol products resulting from a hydroformylation reaction, may be removed by treating the aforesaid products with a solid ...	06/14/1983
4192771	Process for dispersal and redispersal of platinum group metals comprising sulphiding in a stream of inert gas A process for the redispersal or dispersal of a platinum group metal in a catalyst comprising an oxidized platinum group metal component and a refactory inorganic support comprises the steps of treating the oxidized catalyst with a stream of inert gas con...	03/11/1980
4070305	Process for regenerating catalyst Catalyst for removing nitrogen oxides, whose activity is lowered by poisoning with sulfur oxides, is contacted with an ammonia gas at a temperature of 200° to 500° C, whereby the sulfur oxides are liberated from the catalyst, and the catalyst is regener...	01/24/1978
4043938	Methods for reactivating zeolites A zeolite of type 5A, which has been used to separate normal paraffins from a hydrocarbon mixture containing normal paraffins by bringing the hydrocarbon mixture into contact with the zeolite whereby the zeolite absorbs the normal paraffins and then desor...	08/23/1977
4002575	Rejuvenation of supported group VIII metal catalysts Zeolite-supported Group VIII metal hydrogenation catalysts which have undergone damage by thermal and/or hydrothermal stresses, resulting in a maldistribution of the supported metal, are rejuvenated in activity by (1) vapor phase hydration-ammoniation, fo...	01/11/1977

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Class 502/54 - Ammonia or derivative thereof