| abstract |
The invention relates to a process for the preparation of amines by hydrogenation of nitro compounds, characterized in that the hydrogenation in a vertical reactor, the diameter of which is greater than its length, with a jet nozzle arranged in the upper region of the reactor and pointing downwards, via the the starting materials and the reaction mixture are fed in, and is carried out with a fume hood at any point in the reactor, via which the reaction mixture is fed back to the jet nozzle in an external circuit by means of a conveying element, and a flow reversal in the lower region of the reactor. |