Method of reducing the generation of by-product dinitrobenzene in the production of mono -nitrobenzene

摘要

Method for producing a mono nitrobenzene using extrusion flow reactor column. Mono nitrobenzene benzene sulfuric acid, nitric acid and is introduced into the reactor, have been produced is taken at the outflow end. Some sulfuric acid is introduced at the inlet end of the reactor and at least all of the benzene. Is introduced into the inlet end with nitric acid supply path first, the nitric acid portion of the second, nitric acid partial amount of the first one or more of which are spaced apart between the outlet end and the inlet end is introduced in the supply path added. The method avoids the need for distillation step resulted in a reduction in the generation of by-products dinitrobenzene, as well as to improve the reaction yield of mono-nitrobenzene.