KUPFER-TRAEGERKATALYSATOR, VERFAHREN ZU SEINER HERSTELLUNG UND VERFAHREN ZUR HERSTELLUNG VON N-ALKYLIERTEN AROMATISCHEN AMINEN UNTER EINSATZ DIESES KUPFER-KATALYSATORS

摘要

(The) novel copper catalysts on an Al2O3-containing support which is impregnated with compounds of manganese and one or more rare earth metals, having a Cu content of 0.1-5% by weight, a total content of compounds of manganese and of the rare earth metal (metals), calculated as metals, of 0.05 to 8% by weight, the weight ratio of rare earth metal(s) to manganese, calculated as metal, being 5:1-1:5 and all percentage values being based on the total weight of the catalyst, are described. Such catalysts are prepared by first impregnating the support with compounds of manganese and of the rare earth metal (metals), then immobilising the copper salt on the impregnated support and preferentially activating the catalyst by treatment with H2 at 150 to 350 DEG C. Such a catalyst is suitable, for example, for the N-alkylation of aromatic amines with alkanols, it being possible to prepare the aromatic amines from the nitro compounds on which they are based in the alkylation reactor using H2 added at the same time.