METHOD OF PRODUCING 2,4-DINITRO- OR 2,4,6-TRINITROBENZOIC ACIDS Russian patent published in 2013 - IPC C07C205/57 C25B3/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 2,4-dinitro- or 2,4,6-trinitrobenzoic acids which are used as semi-products in synthesis of biologically active substances, starting compounds in production of dyes and aromatic condensation polymers. The disclosed method of producing 2,4-dinitro- or 2,4,6-trinitrobenzoic acids involves electrochemical oxidation of corresponding polynitrotoluenes in a diaphragm cell, which is equipped with a cathode and an anode, in galvanostatic mode, in an acidic medium. The method is characterised by that electrochemical oxidation is carried out in the presence of cobalt nitrate on a platinum anode in concentrated nitric acid at temperature of 30-40°C and current density of 180-700 A·m^-2.

EFFECT: method enables to obtain 2,4-dinitro- or 2,4,6-trinitrobenzoic acids with high substance and current output.

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