Method for producing electrolytic manganese dioxide

Abstract

The invention provides an energy-saving type manganese dioxide electrolysis process and a method of an electrolytic cell device, aiming at solving the problems that the energy consumption is great in a production process of electrolytic manganese dioxide and environment pollution is generated. The electrolysis process is characterized in that a Pt / TiN-CNx nano gas dispersion electrode with a high electrochemical performance is used as a cathode of an electrolytic cell; the electrolytic cell device with an opening air chamber which is isolated at a cathode contact air side by utilizing a corrosion-resisting material is utilized; one side of the cathode is in contact with electrolyte and the other side of the cathode is in contact with the air; oxygen gas in the air is subjected to reduction reaction on the cathode and the reduction reaction can be operated at normal pressure or under a pressurized condition; cell voltage is more effectively reduced and energy sources are saved; a condition that the electrolyte at a solution side excessively permeates into the cathode to corrode a current collector can be avoided by pressurizing; a condition that the electrolyte permeates into the air chamber and is leaked is avoided and the service life of the electrode is prolonged. The service life of the Pt / TiN-CNx nano gas dispersion electrode is three times or more as much as that of a traditional Pt / C gas dispersion electrode under the condition that the air in the air chamber is normal-pressure 1 atmospheric pressure; the voltage of the electrolytic cell is very low and is only 0.7V; the voltage of the cell of a Cu hydrogen evolution electrode reaches 1.8V.

Description

technical field [0001] The field of electrolytic manganese of the present invention relates to a method for preparing electrolytic manganese dioxide by energy-saving electrolysis. The electrolytic cell device is isolated from the gas chamber by corrosion material, and can operate under normal pressure or pressurized, which can reduce the voltage of the cell more effectively, save energy, and prolong the life of the electrode. Background technique [0002] The electrolytic manganese dioxide industry has always been a high-energy-consuming industry. The current production process uses hydrogen-evolving cathodes such as copper and graphite for electrolytic production. Although the current efficiency is as high as 95% to 98%, the cathode also produces hydrogen as a by-product, and the acid mist brought out by the acidic electrolytic solution corrodes the plant equipment and causes environmental pollution in production, and is explosive, affecting the health and safety of workers...

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