Patent ID: 8592637
Filing Date: 2013-11-26
Classification: C07C

Abstract:
1. A process for continuously preparing a nitrated aromatic, the process comprising: (a) feeding an aromatic and a mixture comprising nitric acid, sulfuric acid and water into a tubular reactor, to obtain a first reaction mixture, wherein the tubular reactor has a plurality of vertical tube bends having a deflection angle of 160° to 200°, which are arranged over a total length of the tubular reactor at a distance which corresponds to 30 to 70 times a diameter of the tubular reactor, and a number of static mixing elements which are arranged such that a Bodenstein number is less than 5 in a first part of the tubular reactor and a Bodenstein number is greater than 5 in a second part of the tubular reactor, (b) converting the first reaction mixture in the tubular reactor under an adiabatic condition to obtain a second reaction mixture, and (c) separating the second reaction mixture into an organic phase and an aqueous phase.