| abstract |
According to the invention, the above-mentioned, but above 0.05 wt.% Halogen-containing catalyst is treated at a temperature of from 50 to 90 ° C for 3 to 8 hours with a 3 to 5-fold aqueous ammonia solution per unit volume of catalyst or (II). wherein R 1 is hydrogen or C 1-4 straight or branched alkyl and R 11-4 is straight or branched alkyl or R 1 and R 2 together form C 4-6 alkylene - 5-30 wt% in water and then the catalyst is dried in a gas stream for 10-20 hours. The invention also relates to a process for the preparation of N-alkylcyclohexylamines by reductive amination of cyclohexanone. In the process, the catalyst prepared as described above is used. Scope of the description: 5 pages, 1 drawing (11) HU 202190 B -1- |