Pietzsch-Adolph process

The first hydrogen peroxide plant to go on-stream based on the electrochemical process was in 1908 at the Osterreichische Chemische Werke in Weissenstein. The Weissenstein process was adapted in 1910 to afford the Miincher process developed by Pietzsch and Adolph at the Elecktrochemische Werke, Munich. In 1924, Reidel and Lowenstein used ammonium sulfate under the conditions of electrolysis instead of sulfuric acid, and the resulting ammonium peroxodisulfate (Reidel-Lowenstein process) or potassium peroxo-disulfate (Pietzsch-Adolph process) was hydrolysed to hydrogen peroxide. As a result of this process, production of hydrogen peroxide as 100% m/m rose to approximately 35 000 metric tonnes per annum.5... 

Additional preparative methods For the preparation of HgOg of spectroscopic purity, the process reported by Feher [9] for DgOg can be referred to. This process is based on the work of Pietzsch and Adolph [lO] and involves the reaction of persulfate with steam. 

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