Process for the conversion of aromatic nitro compound into amines

摘要

A process for hydrogenating an aromatic nitro compound according to the invention comprises
providing a hydrogen gas stream and a liquid aromatic nitro compound stream;providing a fixed bed catalytic reactor having an inflow side and an outflow side;feeding to the inflow side, the hydrogen gas stream and the liquid aromatic nitro compound stream;converting the hydrogen gas and the aromatic nitro compound into an aromatic amine, thereby providing a reactor effluent comprising the aromatic amine and water;evacuating the reactor effluent from the reactor at the outflow side of the reactor;

wherein an inert solvent or water is fed to the inflow side of the reactor at a molar ratio of moles inert solvent or water to moles hydrogen is more than 1.

主权项

1. A process for hydrogenating an aromatic nitro compound, the process comprising:
providing a hydrogen gas stream and a liquid aromatic nitro compound stream; providing a fixed bed catalytic reactor having an inflow side and an outflow side; feeding to said inflow side, said hydrogen gas stream and said liquid aromatic nitro compound stream; converting said hydrogen gas and said aromatic nitro compound into an aromatic amine, thereby providing a reactor effluent comprising said aromatic amine and water; and evacuating said reactor effluent from the reactor at the outflow side of said reactor; wherein an inert solvent or water is fed to the inflow side of the reactor at a molar ratio of moles inert solvent or water to moles hydrogen is in a range of about 1.5 to 7.5 and wherein the pressure at the inflow side, the outflow side and throughout the reactor is kept within a range of 30 to 40 barg and the pressure drop between the inflow side and outflow side of the reactor is 0.2 to 4 barg and the aromatic nitro compound is nitrobenzene and the aromatic amine is aniline.