Process for the production of alkali metal- and ammonium peroxodisulfate

US6503386B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Thomas Lehmann · Langenselbold, DE
• Patrik Stenner · Hanau, DE

Key dates

• Filing date: Apr 4, 2001
• Grant date: Jan 7, 2003
• Expiry date: Apr 4, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B1/29
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of a peroxodisulfate, such as ammonium-, sodium- and potassium peroxodisulfate by anodic oxidation of an electrolyte containing a sulfate and/or hydrogen sulfate. The disadvantages of the conventional platinum anodes used for this hitherto can be avoided by using as the anode a diamond film mounted on a conductive carrier and made conductive by doping with a tri- or pentavalent element and by not adding a promoter to the anolyte.