Abstract:
Disclosed is an ammonia decomposition catalyst which is obtained by heat-treating a complex at a temperature of 360°C to 900°C in a reducing atmosphere, wherein the complex containing a polymer having a molecular weight of 1,000 to 500,000 represented by the formula [I], a transition metal coordinated with the polymer, and an activated carbon or a carbon nanotube added thereto. In a case of using the carbon nanotube, an alkali metal compound or an alkaline earth metal compound is added to the heat-treated complex. R 1 represents H or hydrocarbon having 1 to 10 carbon atoms, R 2 and R 3 each represent H, halogen, nitro, acyl, ester, carboxyl, formyl, nitrile, sulfone, aryl, or alkyl group having 1 to 15 carbon atoms, X and Y each represent H or OH, Z represents CH or N, R 4 and R 5 each represent H, OH, ether, amino, aryl, or alkyl group having 1 to 15 carbon atoms, x represents a real number of 1 to 2, y represents a real number of 1 to 3, and n represents a real number of 2 to 120. The amount of the transition metal deposited on the catalyst can be increased without deteriorating the dispersion of the metal, so that the amount of the catalyst required to obtain a desired activity can be reduced.
Abstract:
Provided is a process for producing ammonia by the catalytic reduction of nitrogen oxide in the presence of a hydrocarbon, and in certain embodiments, in the presence of an oxygenated hydrocarbon.
Abstract:
The invention relates to a method for improving the catalytic properties of a catalyst that exists in the form of a structured monolith and comprises one or more elements selected from the group comprising cobalt, nickel and copper, wherein the catalyst is brought into contact with one or more base compounds selected from the group of alkali, earth alkali and rare earth metals. The invention further relates to a method for hydrogenating compounds comprising at least one unsaturated carbon-carbon, carbon-nitrogen or carbon-oxygen compound, in the presence of a catalyst comprising one or more elements selected from the group comprising cobalt, nickel and copper, wherein the catalyst exists in the form of a structured monolith, characterized in that the catalyst is brought into contact with one or more base compounds selected from the group of alkali, earth alkali and rare earth metals. In addition, the invention relates to the use of a base compound selected from the group of alkali, earth alkali and rare earth metals for improving the catalytic properties of a catalyst, comprising copper and/or cobalt and/or nickel, wherein the catalyst exists in the form of a structured monolith.
Abstract:
Disclosed is a method for metallizing a plastic surface. The method may comprise the steps: 1) gasifying the plastic surface to expose the electroless plating promoter; and 2) electroless plating a layer of copper or nickel on the plastic surface, followed by electroplating or a second electroless plating to form a metallized layer on the plastic surface. Further, disclosed are a method for preparing a plastic article and a plastic article as manufactured by the method as described.
Abstract:
A catalyst for the manufacture of alkylene oxide, for example ethylene oxide, by the vapor-phase epoxidation of alkene containing impregnated silver and at least one efficiency-enhancing promoter on an inert, refractory solid support, said support incorporating a sufficient amount of zirconium component (present and remaining substantially as zirconium silicate) as to enhance at least one of catalyst activity, efficiency and stability as compared to a similar catalyst which does not contain the zirconium component.