Abstract:
PROBLEM TO BE SOLVED: To provide a method for continuously hydrogenating an unsaturated compound with integrated advantages including a high space-time yield, a high conversion ratio with improved methodological versatility, and small investment cost. SOLUTION: The method for continuously hydrogenating unsaturated compounds involves: (a) particles of a first hydrogenation catalyst are suspended in a liquid phase in which an unsaturated compound is dissolved, the liquid phase, in the presence of a hydrogenous gas at a first partial hydrogen pressure and at a first temperature, is conducted through a conductive pipe 4 to a packed bubble column reactor in cocurrent counter to the direction of gravity, (c) the effluent from the bubble column reactor is sent to a gas-liquid separation tank 8, (d) the liquid phase from step (c) is sent to a crossfiltration 12 to obtain a retentate 11 and a filtrate 13, (e) the retentate is recycled to step (b), and (f) the filtrate, in the presence of a hydrogenous gas at a second partial hydrogen pressure and at a second temperature, is passed over a bed 18 of a second hydrogenation catalyst. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The invention relates to a catalyst which contains one or more of the elements selected from the group consisting of cobalt, nickel and copper, the catalyst being a structured monolith. The invention is characterized in that the catalyst contains one or more elements selected from the group including alkali metals, alkaline earth metals and rare earth metals. The invention further relates to methods for producing the catalyst according to the invention and to the use of the catalyst in a method for the hydrogenation of organic substances, especially for the hydrogenation of nitriles.
Abstract:
Method for producing olefins through reaction of carbon monoxide with hydrogen in the presence of an iron-containing heterogeneous catalyst, characterized in that the catalyst used comprises carbonyl iron powder with spherical primary particles.
Abstract:
The invention relates to a method for producing amines by reacting sugar alcohols with hydrogen and an amination agent, selected from the group containing ammonia, primary and secondary amines, in the presence of a catalyst at a temperature of between 100°C and 400°C and at a pressure of between 1 and 40 MPa (10 to 400 bar). The catalyst preferably contains a metal or several metals or one or more oxygen-containing compounds of metals in groups 8 and/or 9 and/or 10 and/or 11 of the periodic table of elements. Preferably, the sugar alcohol is obtained by the hydrogenation of the corresponding sugars. The invention also relates to the use of the reaction product as an additive in cement or concrete production and in other application areas.
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:
The invention relates to catalysts and methods for producing the same, the catalysts being obtainable by contacting a monolithic catalyst support with a suspension which contains one or more insoluble or poorly soluble compounds of the elements selected from the group of elements including cobalt, nickel and copper. The invention further relates to the use of the catalyst of the invention in a method for the hydrogenation of organic substances, especially for the hydrogenation of nitriles and to a method for the hydrogenation of organic compounds, characterized by using a catalyst of the invention in the method.
Abstract:
Processes comprising: providing a starting material comprising monoethanolamine; and reacting the starting material with ammonia in the presence of a heterogeneous transition metal catalyst to form a reaction product comprising one or more ethylene amines; wherein the catalyst comprises a catalytically active composition, which prior to treatment with hydrogen, comprises a mixture of oxygen-containing compounds of aluminum, copper, nickel and cobalt; and wherein the catalyst is present as one or more shaped catalyst particles selected from spheres, extrudates, pellets and other geometries, wherein the sphere or extrudate has a diameter of
Abstract:
processo para separar por destilação uma mistura contendo monoetileno glicol e dietilenotriamina em uma corrente. um processo é proposto para a separação por destilação de uma mistura contendo monoetileno glicol e dietilenotriamina, para formar uma corrente (7) que contenha monoetileno glicol e seja amplamente livre de dietilenotriamina, e uma corrente (8) que contenha dietilenotriamina e seja amplamente livre de monoetileno glicol, o processo sendo caracterizado pelo rato de que a separação é realizada pela destilação extrativa com o uso de rietileno glicol como um solvente seletivo para a dietilenotriamina.