Matches 251 - 300 out of 518 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
4999328 Hydrocracking of heavy oils in presence of petroleum coke derived from heavy oil coking operations  
A process for the conversion of a heavy hydrocarbon oil in the presence of hydrogen and iron-petroleum coke catalyst is described in which the iron-petroleum coke catalyst is prepared by grinding...
4992404 Carbon-based catalyst useful in gas-solid reactions  
A carbon-based catalyst which has a carbon content of >65% by weight and a content of substantially insoluble oxides of the metals Co, Fe, Ni, Cr, V, Mo, W, Cu, Mn and Ti of, in all, 0.1% by...
4992252 Method for production of hydroxylammonium salt  
A process for producing hydroxylammonium salts of hydrogenating nitrogen monoxide in an acidic medium in the presence of a catalyst which is prepared by subjecting a platinum compound to a first...
4985386 Carburized platinum catalysts and process for preparing the same employing acid amine salts  
Disclosed herein are a platinum catalyst and a process for preparing the same. The catalyst comprises carbon supports and the carbides of (i) platinum and of (ii) one or more metals selected from...
4980324 Regeneration or activation of noble metal catalysts using fluorohalocarbons or fluorohalohydrocarbons  
This invention provides a process for the regeneration and/or activation of a noble catalyst comprising contacting said catalyst with an atmosphere comprising a fluorohalocarbon and/or a...
4978649 Porous carbonaceous material  
The present invention relates to physical chemistry. The material is made as a three-dimensional matrix with a pore volume of from 0.2 to 1.7 cm 3 /g. The matrix is formed by bent layers of carbon...
4970189 Porous, metal-containing carbonaceous material  
A porous, metal-containing carbonaceous material is disclosed which comprises a porous, carbonaceous body, and fine particles of a metal having an average particle size of 1 μm or less and...
4956331 Process for producing metal supported catalyst having high surface area  
Disclosed herein is a process for reducing metal salts in which catalyst metal containing ions are reduced to the corresponding metals with a reducing agent which contains a sulfur atom and is...
4956328 Process for the preparation of catalyst compositions containing nickel, alumina, and zirconium dioxide and catalysts made therefrom  
A process for the preparation of a compound comprising precipitation from an aqueous solution of a mixture of nickel, aluminum, and zirconium salts by means of an aqueous precipitating solution....
4956326 Method for dehalogenation of a halide and catalyst used therefor  
A catalyst for dehalogenation of a halide comprising a corrosion-resistant ceramic or graphite having a surface area of 5.0 m 2 /g or less and, supported thereon, at least one of a platinum group...
4954474 Process for preparing catalysts by alloying metals on supports  
Disclosed herein is a process for alloying metals on inorganic supports comprising applying the solution of an organic acid amine salt of a second metal onto the inorganic supports already...
4950632 Catalysts and catalyst supports, with inorganic nitrates, for olefin dimerization  
This invention concerns catalyst systems for olefin dimerization wherein said catalyst system comprises at least one elemental alkali metal catalyst, supported on an alkali metal carbonate support,...
4943671 Reductive dehalogenation of organic halogen compounds  
Organic halogen compounds in which one or more halogen atoms are covalently bonded to the carbon are subjected to reductive dehalogenation by reaction with a hydrocarbon in the presence of carbon...
4937220 Method to retard catalyst recrystallization  
The rate of noble metal crystallite recrystallization on a carbon-supported noble metal catalyst is reduced by dispersing two or more different kinds of noble metal-containing crystallites onto the...
4918218 Preparation of acetic acid and methyl acetate  
Preparation of acetic acid and methyl acetate by gas-phase carbonylation of methanol in the presence of a nickel-containing catalyst and in the presence of chlorine, bromine or iodine or a volatile...
4916110 Microporous catalytic material and support structure  
A microporous catalytic material and support prepared under a reducing atmosphere by pyrolysis of an interiorly metal-plated porous polymer to leave the residual microporous tubular-configured...
4914071 Method for preparing a catalyst  
A method for preparing a catalyst suitable for oxidation of carbon monoxide comprises the steps of treating a high surface area carbon support with an aqueous solution of a stannic salt and a...
4895711 Preparation of hydroxylammonium salts  
Hydroxylammonium salts are prepared by catalytic reduction of nitrogen monoxide with hydrogen in dilute aqueous mineral acids at elevated temperature in the presence of suspended supported platinum...
RE33149 Finely particulated colloidal platinum compound and sol for producing the same and method of preparation of fuel cell electrodes and the like employing the same  
This disclosure deals with novel very fine, particulated colloidal platinum of the 15-25 Angstrom size range of unusual catalytic activity and particularly adapted for adsorption or other...
4892972 Purification of crude terephthalic acid  
Aqueous solutions of crude terephthalic acid are purified by hydrogenation in the presence of plural noble metal catalysts in separate layers. Initially, the solution to be purified is passed...
4874888 Process for the preparation of a diester of oxalic acid  
In a process for preparing a diester of oxalic acid by the vapor phase catlytic reaction of carbon monoxide with an ester of nitrous acid in the presence of a catalyst composed of a solid carrier...
4873214 Carbonaceous material for production of hydrogen from low heating value fuel gases  
A process for the catalytic production of hydrogen, from a wide variety of low heating value fuel gases containing carbon monoxide, comprises circulating a carbonaceous material between two...
4866023 Process for the shaping agglomeration of particulate solids and solids produced by the process  
A process for producing shaped, agglomerated, particulate solids, by combining finely divided solids with a polymeric binder solution and curing the combination with polyvalent metal cations; and...
4837189 Surfactant modified metal catalysts  
Surfactant-modified metal catalysts which can be used in a process for hydrogenating mediators.
4831003 Catalyst composition and process of making  
A catalyst composition prepared by depositing a metal or metal compound onto a carbon support formed, in effect, simultaneously with the deposition of the metal or metal compound via partial...
4826795 Catalyst for the production of an alcohol and/or a carboxylic acid ester by hydrogenation of a carboxylic acid  
An alcohol and/or a carboxylic acid ester is (are) produced from a C 2 to C 12 carboxylic acid by contacting the carboxylic acid at elevated temperature and pressure with hydrogen in the presence...
4808563 Molybdenum-tungsten-containing catalyst for methane conversion process  
A catalyst is disclosed which comprises a molybdenum-tungsten-containing complex represented by the formula Mo a W b M c A d O e wherein M is selected from the group consisting of one or more...
4806290 Low density microcellular carbon or catalytically impregnated carbon forms and process for their preparation  
Machinable and structurally stable, low density microcellular carbon, and catalytically impregnated carbon, foams, and process for their preparation, are provided. Pulverized sodium chloride is...
4770867 Process for the production of carbon fibres which are vapor-deposited from methane  
The invention concerns a process for the production of vapor-deposited carbon fibres wherein a gaseous or vaporized hydrocarbon which is entrained by a carrier gas is pyrolyzed on a substrate in a...
4767737 Method for making carbonaceous materials  
A fluidized bed disproportionation of carbon monoxide is effected using ferrous metal component-containing catalysts in particulate form. The bed also contains an abradant to continuously remove...
4743431 Fluidization aid including low bulk density fluidization aid  
Tendrillar carbonaceous material is used as a fluidization aid for fluidized beds. The tendrillar carbonaceous material can be used to fluidize cohesive solids. Further, it can be used to improve...
4732883 Catalytic oxidation of propylene to allyl acetate  
Propylene is oxidized directly to allyl acetate in the presence of acetic acid air or oxygen in the liquid phase under moderate reaction conditions employing a palladium-on-carbon catalyst which...
4728630 Rhodium on carbon catalyst  
A particulate catalyst composition suitable for purification of terephthalic acid under reducing conditions and a method of preparation of such catalyst are disclosed. The catalyst composition...
4727185 Process for preparation of 3,3',4,4'-biphenyltetracarboxylic acid salts  
When a 4-halogenoorthophthalic acid salt is dissolved together with a base in an alkaline aqueous solution and the solution is heated in the presence of a catalyst comprising a noble metal...
4713483 Process for the production of oxalic acid diesters  
A process for the production of diesters of oxalic acid by oxidative carbonylation of alcohols with carbon monoxide and oxygen as oxidizer at pressures of 1 to 700 atmospheres and in a temperature...
4710483 Novel carbonaceous material and process for producing a high BTU gas from this material  
Disclosed is a carbonaceous material which reacts rapidly with hydrogen to produce a methane-rich gas containing at least 20% by volume methane. The carbonaceous material is formed by contacting a...
4687753 Laser produced iron carbide-based catalysts  
This invention relates to a finely divided iron carbide-first row transition metal-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser. The catalysts...
4668647 Iron carbide-based catalyst produced in the presence of laser radiation  
This invention relates to a finely divided iron carbide-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser. The catalysts may be used to produce...
4659683 Regeneration of inactive and poisoned platinum catalysts  
Noble metal catalyst, in particular platinum catalysts, which are applied on carriers and have become poisoned by metals as a result of being used for many years in the preparation of...
4659681 Promoted iron-carbon-based catalysts produced in the presence laser radiation  
This invention relates to a promoted finely divided or supported iron carbide-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser and the use of such...
4659686 Method for treating carbon supports for hydrogenation catalysts  
A method for treating carbon that is deficient in alkali and/or alkaline earth metal content to improve the efficacy of the carbon as a catalyst support, particularly as a support for a noble metal...
4656153 Active carbon containing a dispersion of a metal component and method for making same  
A high surface area, porous active carbon containing a substantially uniform dispersion of a metal or metal-containing material and a method for making the same are disclosed.
4656154 Potassium carbonate with carbon supports and catalysts with elemental alkali metal  
Catalyst supports, catalysts, method for the preparation thereof, and dimerization processes therewith are provided. Catalyst supports consist essentially of potassium carbonate with a crush...
4652537 Process for preparing carbon monoxide platinum conversion catalyst  
There is provided a process for producing a catalyst to convert carbon monoxide in a gas into carbon dioxide. The process comprises causing activated carbon to absorb an aqueous solution of...
4636485 Filter comprising a catalyst on a substrate for purification of air  
Pt catalyst on a substrate provides an air purification particularly for carbon oxide contained in the inhaled air is caused to react with air oxygen on the surface of carbon oxide catalysts and...
4629715 Purification of terephthalic acid to relatively low levels of 4-carboxybenzaldehyde and catalyst therefor  
Aqueous solutions of crude terephthalic acid are purified to relatively low 4-carboxybenzaldehyde levels under hydrogenation conditions by using a layered catalyst bed. The aqueous terephthalic...
4626598 Purification of terephthalic acid  
An improved method for producing purified terephthalic acid by catalytic hydrogenation is disclosed. Control of the reduction of colored compounds during the production of purified terephthalic...
4618704 Acyloxy-2-butenes and their preparation  
Acyloxy-2-butenes of the formula ##STR1## where R 1 , R 3 and R 4 are each hydrogen or alkyl of 1 to 5 carbon atoms, R 2 is alkyl of 1 to 5 carbon atoms, R 5 is hydrogen, alkyl of 1 to 5 carbon...
4613582 Method for making ternary fuel cell catalysts containing platinum cobalt and chromium  
An improved ternary noble metal-containing, alloy catalyst which has a catalytic activity for the electrochemical reduction of oxygen greater than two and one-half times that of the supported...
4609636 Pd/Re hydrogenation catalyst for making tetrahydrofuran and 1,4-butanediol  
Palladium/rhenium-on-carbon catalyst; a method employing said catalyst to produce tetrahydrofuran, 1,4-butanediol or mixtures thereof in selectable ratios from a number of starting reactants; and a...
Matches 251 - 300 out of 518 < 1 2 3 4 5 6 7 8 9 10 11 >