A process for the electrolytic separation of oxygen from its...

C - Chemistry – Metallurgy – 25 – B

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C25B 1/02 (2006.01) B01D 53/32 (2006.01) C01B 13/02 (2006.01) C25B 9/00 (2006.01)

Patent

CA 2191625

he process comprises the following steps: a) bringing into contact an oxygen containing gas with a gas diffusion cathode which does not contain a hydrogen peroxyde decomposition catalyst, b) providing a potential difference between the cathode and an anode, so that the oxygen is converted to peroxyde at the cathode, the peroxyde is diffused through an aqueous electrolyte up to the anode, and the peroxyde is converted to pure oxygen at the anode, the process is a new method capable of separating the oxygen through a bi-electronic process. The equipment comprises a single compartment electrolytic cell (1) with at least one cathode (8) and one anode (9), an inlet (12) through the cathode for the introduction of a gas mixture which contains oxygen and an outlet (5) for pure oxygen produced in the cell.

Le procédé comprend les étapes suivantes: a) mise en contact d'un gaz contenant de l'oxygène avec une cathode de diffusion de gaz, laquelle ne contient pas de catalyseur de décomposition de péroxyde d'hydrogène; b) créer une différence de potentiel entre la cathode et l'anode, de sorte que l'oxygène est converti en péroxyde au niveau de la cathode, le péroxyde se diffuse à travers l'électrolyte aqueux jusqu'à l'anode, et le péroxyde est converti en oxygène pur au niveau de l'anode. Cette nouvelle méthode permet de séparer l'oxygène par application d'un processus biélectronique. L'appareil comprend une cellule électrolytique à un seul compartiment (1) présentant au moins une cathode (8) et une anode (9), une entrée (12) à travers la cathode pour l'introduction d'un mélange gazeux qui contient de l'oxygène, et une sortie (5) de l'oxygène pur produit dans la cellule.

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