Patent ID: 9556527
Date: 2017-01-31
CPC Classifications: C25B

Claim:
1. A process for the preparation of an ammonium or alkali metal peroxydisulphate, comprising: anodic oxidation of an aqueous electrolyte comprising a salt chosen from ammonium sulphate, alkali metal sulphate and/or the corresponding hydrogen sulphate in a tubular electrolytic cell comprising at least one anode and one cathode wherein a diamond layer arranged on a conductive carrier and doped with a tri- or pentavalent element is used as the anode, the tubular electrolytic cell comprises an undivided electrolyte chamber between the anode and the cathode, and the aqueous electrolyte comprises no promoter for increasing the decomposition voltage of water to oxygen and has a total solids content of from about 0.5 to about 650 g/l.