Patent ID: 6043394
Filing Date: 2000-03-28
Classification: B01J,C07C

Abstract:
A process for the production of aromatic amines by catalytic hydrogenation of corresponding aromatic nitro compounds in the gas phase on immobilised catalysts which contain a metal component comprising a metal selected from the group consisting of metals of VIIIa, Ib, IIb, IVa, Va, VIa, IVb and Vb groups of the periodic system of elements (Mendeleyev) on a ceramic support material having a BET surface area of less than 40 m.sup.2 /g, at molar ratios of hydrogen to nitro group or nitro groups of 3:1 to 30:1 and temperatures in the catalyst bed of 180 to 500.degree. C., wherein loading of the catalyst with the aromatic nitro compounds used is increased continuously or step-wise from 0.01-0.5 to 0.7-5.0 kg/l.times.h, wherein maximum loading is achieved within 10 to 1000 hours.