Process for the simultaneous electrochemical preparation of...

Details Process for the simultaneous electrochemical preparation of... Process for the simultaneous electrochemical preparation of...

C - Chemistry, Metallurgy

25

B

C25B 1/28 (2006.01) C25B 1/14 (2006.01)

Patent

CA 2345451

A process for the simultaneous preparation of sodium peroxodisulfate and sodium dithionite, which comprises, in electrolysis cells divided into two by a cation exchanger membrane, at current densities of from 1.5 to 6 kA/m2 and temperatures of from 20 to 60°C, in aqueous solution, oxidizing sodium sulfate at the anode to give sodium peroxodisulfate, and preparing sodium dithionite at the cathode from the sodium ions liberated at the anode and converted by the cation exchanger membrane and introduced SO2 at a pH of from 4 to 6.

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