US 2011/0218368 A1 · METHOD FOR REDUCING THE FORMATION OF BY-PRODUCT DINITROBENZENE IN THE PRODUCTION OF MONONITROBENZENE

Abstract

A method for making mononitrobenzene using a plug flow reactor train. Benzene, nitric acid and sulfuric acid are introduced into the reactor and produced mononitrobenzene is removed at an outlet end. All of the benzene and at least part of the sulfuric acid are introduced at the inlet end of the reactor. A first portion of the nitric acid is introduced by a first nitric acid feed into the inlet end and a second portion of the nitric acid is introduced at one or more additional feeds that are spaced between the inlet end and the outlet end. The method results in reduced formation of by-product dinitrobenzene, improving the reaction yield of mononitrobenzene while avoiding the need for a distillation step.

Claims13

Dependent claims

An adiabatic method of making mononitrobenzene using a reactor train comprising at least in part a plug flow reactor, the reactor train having an inlet end and an outlet end, comprising the steps of:

introducing substantially all of the benzene into the reactor train at the inlet end;
introducing at least a portion of the sulfuric acid into the reactor train at the inlet end;
introducing a first portion of the nitric acid into the reactor train at the inlet end by a first nitric acid feed and a second portion of the nitric acid into the reactor train at one or more additional nitric acid feeds spaced between the inlet end and the outlet end;
and
removing a product stream comprising produced mononitrobenzene from the reactor train at the outlet end.

2 more elements

Dependencies are inferred from the claim text.

Method for reducing the formation of by-product dinitrobenzene in the production of mononitrobenzene

Life of this patent

Method for reducing the formation of by-product dinitrobenzene in the production of mononitrobenzene

Life of this patent

Abstract

Claims13