N, n-dimethyl-1,3-diaminopropane (DMAPA) synthesizing method

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 providedand 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 hydroge