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 5-isopropyl-3-aminomethyl-2-methyl-1-amino-cyclohexane (carvone diamine) and a method for the production thereof by a) reacting carvone with hydrogen cyanide, b) then reacting the carvone nitrile obtained in step a) with ammonia in the presence of an imine-forming catalyst, and c) subsequently reacting the reaction mixture that is obtained in step b) and contains carvone nitrilimine with hydrogen and ammonia on hydrogenation catalysts. The invention further relates to the use of carvone diamine as a curing agent for epoxy resins, as an intermediate product when producing diisocyanates, as an initiator entity when producing polyetherols, and/or as a monomer for producing polyamides.
Abstract:
The present invention relates to a method for producing amines by reacting glycerin with hydrogen and an aminization agent, selected from the group of ammonia, primary and secondary amines, in the presence of a catalyst, at a temperature of 100°C to 400°C and a pressure of 0.01 to 40 MPa (0.1 to 400 bar). A glycerin based on sustainable raw materials is preferably used. The catalyst preferably comprises a metal or a plurality of metals or one or more oxygen-containing compounds of the metals of groups 8 and/or 9 and/or 10 and/or 11 of the periodic table of elements. The invention further relates to the use of the reaction products as an additive in cement or concrete production and in other fields of application. The present invention further relates to the compounds 1,2,3-triaminopropane, 2-aminomethyl-6-methyl-piperazine, 2,5-bis(aminomethyl)-piperazine, and 2,6-bis(aminomethyl)-piperazine.
Abstract:
The present invention relates to a process for preparing nitriles, imines and/or enamines by converting a primary and/or secondary amine in the presence of oxygen and of an oxidation catalyst, which comprises converting an amine to the gas phase and passing it over an oxidation catalyst in an oxygenous gas stream. The invention further relates to a process for preparing amino nitriles and to the hydrolysis thereof to amino amides.
Abstract:
The invention relates to a method for hydrogenating oligonitriles containing at least two nitrile groups in the presence of a catalyst which is pre-treated by being contacted with a compound A prior to the hydrogenation process, said compound A being selected among alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogen carbonates, alkaline earth metal hydrogen carbonates, ammonium hydrogen carbonate, alkaline earth metal oxocarbonates, alkali metal carboxylates, alkaline earth metal carboxylates, ammonium carboxylates, alkali metal dihydrogen phosphates, alkaline earth metal dihydrogen phosphates, alkali metal hydrogen phosphates, alkaline earth metal hydrogen phosphates, alkali metal phosphates, alkaline earth metal phosphates and ammonium phosphate, alkali metal acetates, alkaline earth metal acetates, ammonium acetate, alkali metal formates, alkaline earth metal formates, ammonium formate, alkali metal oxalates, alkaline earth metal oxalates, and ammonium oxalate.
Abstract:
The invention relates to a diamine industrially producing method from a corresponding alkenile-nitrile which contains at least one C-C double bond consisting (a) in reacting the alkenile-nitrile in a first reactor with a corresponding monoamine by exothermally adding a monoamine to said double bond in such a way that an aminoalkyle nitrile is obtained, wherein the monoamine and water are provided and the alkenile-nitrile is added, (b) in evaporating the unreacted alkenile-nitrile and aminoalkyle for enriching the aminoalkyle nitrile produces in the sump of the first reactor, (c) in transferring the aminoalkyle nitrile bottom product of the step (b) to a second reactor, (d) in batchwisely catalytically hydrogenating the aminoalkyle nitrile transferred at the step (c) in such a way that a diamine is produced in the second reactor, wherein for each batch, an appropriate catalyst and water for hydrogenating nitrils into amines, a desired diamine and a base are provided, the second reactor is supplied with hydrogen and the aminoalkyle nitrile transferred at the step (c) is proportioned therein, and (e) in extracting the diamine and in possibly repeating the steps from (a) to (e). A device for producing the diamine and the use of the devices are also disclosed. The preferred diamine is embodied in the form of a 3-dimethylaminopropylamine (DMAPA).