| 摘要 |
Producing aromatic amines by hydrogenation of aromatic nitro compounds, comprises (A) supplying aromatic nitro compounds and hydrogen to a reactor in contact with a hydrogenation catalyst, and (B) terminating the supply of aromatic nitro compounds and hydrogen into the reactor, where the step B is carried out by (B1) introducing the supplied aromatic nitro compounds in the reactor so that the aromatic nitro compounds remaining in the reactor and/or system parts fluidly connected upstream of the reactor are reacted with other supplied hydrogen. Producing aromatic amines by hydrogenation of aromatic nitro compounds, comprises (A) supplying aromatic nitro compounds and hydrogen to a reactor in contact with a hydrogenation catalyst, and (B) terminating the supply of aromatic nitro compounds and hydrogen into the reactor, where the step B is carried out by (B1) introducing the supplied aromatic nitro compounds in the reactor so that the aromatic nitro compounds remaining in the reactor and/or system parts fluidly connected upstream of the reactor are reacted with other supplied hydrogen, and (B2) then adjusting the supply of hydrogen after a predetermined time and/or after falling below a predetermined concentration of aromatic nitro compounds in a gas stream entering the reactor. |
