Metallgesellschaft Aktiengesellschaft

Paul Janisch

Karl Lohrberg

Siegfried Bielz

In the continuous production of chlorine dioxide wherein an alkali metal chlorate solution is reacted with hydrochloric acid in a reactor through which an air stream is passed countercurrent to the alkali metal chlorate solution, and there discharged from the reactor chlorine dioxide and alkali metal chloride solution, the improvement which comprises including chlorine gas in the air stream, thereby permitting the overall efficiency of the process to be increased at a given content of chlorine dioxide in the gas discharged from the reactor.

Process of producing chlorine dioxide

A process for the production of chlorine dioxide by membrane electrolysis of aqueous sodium chloride, reaction of hydrogen and chlorine so-formed to form hydrogen chloride and reaction of the so-formed hydrogen chloride with the sodium chlorate also formed by the electrolysis to form chlorine dioxide is disclosed. Also disclosed is the production of chlorine by such a process.

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Steinau, Germany

Paul Janisch