| 摘要 |
The invention relates to a continuous method for producing aromatic diamines and/or polyamines by means of catalytic hydrogenation of corresponding aromatic dinitro and/or polynitro compounds with hydrogen. The invention is characterized in that in a reactor with a catalytic fixed bed or shower bed with a pressure ranging from 5 to 100 bar and at a reaction temperature ranging from 100 to 220 DEG C, a) the aromatic dinitro and/or polynitro compounds are optionally introduced in the presence of a solvent in a product stream comprised of an essentially recycled hydrogenated product, water and hydrogen, and b) a part of the product stream is continuously withdrawn from the reactor system. |
