Abstract:
The present invention relates to a process for preparing a cyclic diamine, comprising the reaction of at least one cyclic alkene with a gas mixture (G) comprising dinitrogen monoxide to give at least one cyclic ketone and the subsequent conversion of the at least one cyclic ketone to a cyclic diamine. The invention also relates to the use of a cyclic diamine with primary and secondary amine functions thus obtained to prepare polyamides and polyurethanes.
Abstract:
The invention relates to a method for producing triethylenediamine (TEDA) derivatives, comprising the following steps: a) reaction of a dihydropyrazine with an olefin, b) optionally hydrogenation following step a). The invention also relates to novel TEDA derivatives as such and to the use thereof as built-in polyurethane catalysts.
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:
The present invention relates to a method for removing halogenide ions from liquid ammonia, characterized in that the liquid ammonia is brought into contact with a strongly basic ion exchanger, wherein the structure of the strongly basic ion exchanger is a covalently bonded polymer matrix. The present invention further relates to the use of an ammonia obtained according to the invention as an educt in the manufacture of amines.
Abstract:
The invention relates to a method for producing tertiary amines based on polyisobutene polymers by reacting polyisobutene alcohol, optionally in admixture with polyisobutene aldehyde, with at least one secondary amine in the presence of at least one heterogeneous catalyst which has a nickel content, calculated as NiO, of less than 50% by weight. The invention also relates to a method for producing quaternized polyisobutene ammonium compounds from the tertiary polyisobutene amines obtained, using a quaternizing agent. The polyisobutene amines or quaternized polyisobutene ammonium compounds are used as fuel additives, in particular in diesel engines with common rail injection systems.
Abstract:
The present invention relates to a method for producing N,N-substituted-3-aminopropan-1-ols by a) converting secondary amine with acrolein at a temperature of (-50) to 100°C and a pressure of 0.01 to 300 bar, and b) converting the reaction mixture obtained in step a) with hydrogen and ammonia in the presence of a hydrogenation catalyst at a pressure of 1 to 400 bar, characterized in that in step a) the molar ratio of secondary amine to acrolein is 1:1 or more and the temperature in step b) is in the range of (-50) to 70°C. In a preferred embodiment, an acrolein that was obtained from glycerine based on renewable raw materials is used. The invention further relates to the use of an N,N-dimethyl-3-aminopropan-1-ol (DMAPOL) based on renewable raw materials as a catalyst for producing polyurethane, as a scrubbing liquid in gas scrubbing, in the field of electronics chemicals and electroplating, as a feed material in organic synthesis, and as an intermediate product in the production of pharmaceuticals and plant protection agents.
Abstract:
The invention relates to a method for producing N,N-substituted- 1,3-propandiamine by a) reacting secondary amines with acrolein at a temperature between (-50) - 100°C and at a pressure between 0,01 - 300 bar, and b) reacting the reaction mixture obtained in step a) with hydrogen and ammonia in the presence of a hydrogenation catalyst at a temperature between 40 - 400°C and at a pressure of 1 - 400 bar. The invention is characterised in that in step a) the molar ratio of secondary amines to acrolein is 2:1 or more and the hydrogenation catalyst used in step b) contains cobalt. In a preferred embodiment, acrolein that is obtained from glycerin based on renewable raw material is used. The invention also relates to the use of a N,N-dimethyl-1,3-propandiamine (DMAPA) based on renewable raw material as charge material for soft soaps and other detergents, coagulation agents, polymers and comb polymers. In another preferred embodiment, step b) takes place in the presence of water.
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.