Bayer Aktiengesellschaft

Thomas-Jorn Schulz

Eberhard Zirngiebl

Udo Birkenstock

Herbert Schmidt

Walter Kipshagen

Chlorine-substituted aromatic amines are prepared by the hydrogenation of chlorine-substituted aromatic nitro compounds in the presence of a catalyst containing platinum and nickel and/or cobalt on an activated charcoal support, the platinum having been simultaneously deposited and reduced on the activated charcoal support in the preparation of the catalyst. Such catalysts are furthermore prepared, as are catalysts containing noble metals on an activated charcoal support, it also being possible for the latter to be used for the reduction of nitronaphthalenes or nitrotoluenes.

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Leverkusen, Germany

Thomas-Jorn Schulz