Synthesizing di and/or triamines from di and/or trimer fatty acids comprises transforming acid groups of dimers and/or trimers into nitrile groups to obtain di and trinitrile, and conversion of the nitrile groups into primary amino groups

摘要

Synthesizing di- and/or triamines from di- and/or trimer fatty acids comprises transformation of acid groups of dimers and/or trimers into nitrile groups to obtain di- and trinitrile in the presence of an ammoniation catalyst comprising metal oxides, preferably zinc oxide, in a reactor under agitation, then introduction of ammonia gas in the reactor; and conversion of the obtained nitrile groups of product into primary amino groups by hydrogenation in the presence of a hydrogenation catalyst and hydrogen, in a reactor under pressure. Synthesizing di- and/or triamines from di- and/or trimer fatty acids comprises transformation of acid groups of dimers and/or trimers into nitrile groups to obtain di- and trinitrile in the presence of an ammoniation catalyst comprising metal oxides, preferably zinc oxide, in a reactor under agitation, where the weight ratio of catalyst/diacids and/or triacids is 0.01:0.15, then introduction of ammonia gas in the reactor; and conversion of the obtained nitrile groups of product into primary amino groups by hydrogenation in the presence of a hydrogenation catalyst and hydrogen, in a reactor under pressure, where the conversion step comprises introducing the ammonia to ambient temperature and bring the reaction medium under agitation before introducing hydrogen, after contacting of nitrile obtained from transformation step and hydrogenation catalyst, where the reaction temperature is 110-170[deg] C, preferably 130-150[deg] C, the quantity of implemented hydrogenation catalyst has 3-10 wt.% of the nitrile charge, and the molar ratio of ammonia to nitrile group is 0.2:3, when the molar ratio of the ammonia to nitrile group is 0.2:1.3, preferably 0.5: 1, then at least a strong base (0.07-1 wt.%), preferably in the aqueous form is added to the reaction medium, and the molar ratio of the ammonia to nitrile group is 1.3:3, preferably 1.5:2.6, then the presence of strong base is optional. An independent claim is included for the di-and triamines obtained by the process.