Method of purification of a redox mediator before...

Details Method of purification of a redox mediator before... Method of purification of a redox mediator before...

C - Chemistry, Metallurgy

22

B

C22B 3/22 (2006.01) C07C 45/28 (2006.01) C07C 46/04 (2006.01) C22B 3/44 (2006.01) C25B 3/02 (2006.01) C25B 15/08 (2006.01)

Patent

CA 2438331

A method for purifying a Redox mediator used in a chemical process of oxidation of organic compounds. The desired purification is obtained by recovering the mediator in the form of a solution and heating this solution to evaporate the volatile impurities contained in it and to oxidize the non volatile impurities into compounds which precipitate and are extracted by filtration. The purification takes place before the mediator is regenerated in the electrolysis cell. This prevents the impurities contained in the mediator solution to negatively affect the operation of this cell.

La présente invention concerne un procédé permettant la purification d'un médiateur Redox utilisé dans un processus chimique d'oxydation de composés organiques. La purification désirée est réalisée grâce à la récupération du médiateur sous la forme d'une solution, et au chauffage de cette solution pour faire s'évaporer les impuretés volatiles qu'elle contient, et pour provoquer l'oxydation des impuretés non volatiles pour former des composés qui précipitent et sont extraits par filtrage. La purification est suivie de la régénération du médiateur dans une cellule électrolytique. Cela permet d'éviter aux impuretés contenues dans la solution de médiateur d'avoir des effets nocifs sur le fonctionnement de ladite cellule.

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