Electrosynthesis of hydroxylammonium salts and hydroxylamine...

C - Chemistry – Metallurgy – 25 – B

Patent

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C25B 11/06 (2006.01) B01D 61/44 (2006.01) B01D 61/52 (2006.01) B01J 37/34 (2006.01) B32B 17/10 (2006.01) C25B 1/00 (2006.01) C25B 3/00 (2006.01) C25B 3/10 (2006.01)

Patent

CA 2301035

In one embodiment, the present invention relates to a method of making a catalytic film comprising: applying an electric current to an electrochemical cell comprising an anode, a cathode and a solution comprising a film forming compound and a nitrate ion source thereby forming the catalytic film. In another embodiment, the present invention relates to a method of preparing a hydroxylammonium salt, involving the steps of: providing an electrochemical cell containing an anode, a cathode, and a divider positioned between the anode and the cathode, to define a catholyte compartment between the cathode and the divider and an anolyte compartment between the anode and the divider; charging the catholyte compartment with a first solution comprising a nitrogen containing compound and a mediator and the anolyte compartment with a second solution comprising an ionic compound; passing a current through the electrochemical cell to produce a hydroxylammonium salt in the catholyte compartment; and recovering the hydroxylammonium salt from the catholyte compartment.

Selon un mode de réalisation, la présente invention concerne un procédé de fabrication d'un film catalytique. Ce procédé consiste à appliquer un courant électrique à une cellule électrochimique comportant une anode, une cathode et une solution renfermant un composé permettant la formation d'un film ainsi qu'une source d'ions nitrate; ceci permet de former le film catalytique. Selon un autre mode de réalisation, la présente invention se rapporte à un procédé de préparation d'un sel d'hydroxylammonium. Ce second procédé consiste à prendre une cellule électrochimique comportant une anode, une cathode et un séparateur positionné entre l'anode et la cathode en vue de délimiter un compartiment catholyte entre la cathode et le séparateur et un compartiment anolyte entre l'anode et le séparateur; à charger le compartiment catholyte d'une première solution contenant un médiateur et un composant renfermant de l'azote; à charger le compartiment anolyte d'une seconde solution renfermant un composé ionique; à faire passer un courant dans cette cellule électrochimique en vue de produire un sel d'hydroxylammonium dans le compartiment catholyte; et à récupérer ce sel d'hydroxylammonium dans le compartiment catholyte.

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