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Electrosynthesis of Potassium Permanganate in a Cation Exchange Membrane Cell / K. Subramanian ; K. G. Gomathi ; K. Asokan in Industrial & engineering chemistry research, Vol. 47 n°22 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°22 (Novembre 2008) . - p. 8526–8532 Titre : Electrosynthesis of Potassium Permanganate in a Cation Exchange Membrane Cell Type de document : texte imprimé Auteurs : K. Subramanian, Auteur ; K. G. Gomathi, Auteur ; K. Asokan, Auteur Année de publication : 2008 Article en page(s) : p. 8526–8532 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Potassium  Permanganate  Electrosynthesis Résumé : Potassium permanganate is produced by the electro-oxidation of alkaline potassium manganate in a divided electrolytic cell. A filter press type flow electrolyzer has been designed, fabricated, and operated with perfluoro sulfonic acid based cation exchange membrane Nafion 417, precious metal/precious metal oxide coated titanium anode, and stainless steel cathode. Optimum process parameters are evaluated and reported. Performance characteristics of coated titanium anodes are compared with conventional nickel anodes, to fix the most suitable one for the job on hand. Anode materials have been electrochemically characterized by potentiodynamic studies in alkaline potassium manganate solution. Transport properties of the membrane Nafion 417 for K+ ions and water molecules are studied using a small membrane cell operating on batch mode. It has been estimated that each K+ ion transported across the membrane carries with it 1.5 to 1.7 water molecules. The anolyte contains K2MnO4 and KOH. Studies reveal that the relative current efficiency value for electro-oxidation of manganate and the competing anodic oxygen evolution may have a direct bearing on the source of K+ ion transported across the cation exchange membrane. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800240m [article] Electrosynthesis of Potassium Permanganate in a Cation Exchange Membrane Cell [texte imprimé] / K. Subramanian, Auteur ; K. G. Gomathi, Auteur ; K. Asokan, Auteur . - 2008 . - p. 8526–8532. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°22 (Novembre 2008) . - p. 8526–8532 Mots-clés : Potassium  Permanganate  Electrosynthesis Résumé : Potassium permanganate is produced by the electro-oxidation of alkaline potassium manganate in a divided electrolytic cell. A filter press type flow electrolyzer has been designed, fabricated, and operated with perfluoro sulfonic acid based cation exchange membrane Nafion 417, precious metal/precious metal oxide coated titanium anode, and stainless steel cathode. Optimum process parameters are evaluated and reported. Performance characteristics of coated titanium anodes are compared with conventional nickel anodes, to fix the most suitable one for the job on hand. Anode materials have been electrochemically characterized by potentiodynamic studies in alkaline potassium manganate solution. Transport properties of the membrane Nafion 417 for K+ ions and water molecules are studied using a small membrane cell operating on batch mode. It has been estimated that each K+ ion transported across the membrane carries with it 1.5 to 1.7 water molecules. The anolyte contains K2MnO4 and KOH. Studies reveal that the relative current efficiency value for electro-oxidation of manganate and the competing anodic oxygen evolution may have a direct bearing on the source of K+ ion transported across the cation exchange membrane. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800240m