| 摘要 |
Prodn. of aromatic amines of formula (I) comprises gas phase hydrogenation of nitroaromatics of formula (II) with H2 over a stationary catalyst of Pd on a graphite of graphitised coke support with a BET surface area of 0.2-10 m<2>/g. The novel features are that (a) the catalyst contains more than 1.5 to 7 wt.% Pd w.r.t. total catalyst and (b) the H2 supply to the catalyst is 30-6000 equiv./NO2 gp. equiv.: R1, R2 = H, Me, Et or NH2; R3, R4 = H. Me, Et or NO2. Also claimed is the catalyst per se. |
