| abstract |
Under adiabatic reaction conditions, 1,2-dichlorobenzene can be converted very selectively to 3,4-dichloronitrobenzene by mixing 1,2-dichlorobenzene with nitric acid, sulfuric acid and water simultaneously or successively in their total amount, for which purpose a mixing energy of 1-50 Watts per liter of the entire reaction mixture, preferably 3-30 W / l, is applied, and maintains a temperature of 0 to 60 ° C. during the mixing. |