METHOD FOR PRODUCING SECONDARY AMINES FROM NITRILES AND PRIMARY AMINES

摘要

The invention relates to a method for producing amines of general formula (I) X(-CH2-NHR)n in which R independently represents C1-200-alkyl, C3-8-cycloalkyl, C4-20-alkyl cycloalkyl, C4-20-cylcoalkyl alkyl, C2-20-alkoxyalkyl, aryl, C7-20-alkylaryl, C7-20-aryl alkyl, C2-8-hyrodoxyalkyl, C2-8-mercaptoalkyl, C8-20-aryloxyalkyl or jointly represents a saturated or unsaturated C2-6-alkylene chain which is optionally substituted singly to triply by C1-4-alkyl and is optionally interrupted by oxygen or nitrogen. X is a C1-20-alkyl, C2-20-alkenyl or C3-8-cycloalkyl with n free valances optionally substituted by C1-20-alkyl, C3-8-cycloalkyl, C4-20-alkyl cycloalkyl, C4-20-cycloalkyl alkyl, C2-20-alkoxyalkyl, aryl, C7-20-alkylaryl, C7-20-aryl alkyl, C1-20-alkoxy, hydroxy, C1-20-hyrodoxyalkyl, amino, C1-20-alkyl amino, C2-20-dialkyl amino, C2-12-alkenyl amino, C3-8-cycloalkyl amino, aryl amino, diaryl amino, aryl-C1-8-alkyl amino, halogen, mercapto, C2-20-alkenyloxy, C3-8-cycloalkoxy, aryloxy, and C2-8-alkoxycarbonyl, and n is a whole number from 1 to 4. The amines are produced by reacting nitriles of general formula (II) X(-CN)n in which X and n have the above mentioned meanings with primary amines of general formula (III) H2NR in which R has the above mentioned meanings, and with hydrogen at temperatures ranging from 50 to 250 DEG C and pressure ranging from 5 to 350 bar in the presence of a catalyst containing Pd, whereby the catalyst comprises 0.1 to 10 wt. % Pd on a carrier, said wt. % being relative to the total weight of the catalyst.