Purification of noble gases using online regeneration of...

C - Chemistry – Metallurgy – 01 – B

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C01B 23/00 (2006.01) B01D 53/46 (2006.01) B01D 53/86 (2006.01)

Patent

CA 2641155

Processes for the recovery and purification of noble gas stream contaminated with small amounts of hydrogen and/or other getter combustibles. One process involves dividing the noble gas stream gas into a first and second noble gas streams. The first noble gas stream is sent to a second metal getter containing a bed comprised of a metal getter in an oxidized state wherein the hydrogen is combusted. Oxygen is added to the second noble gas stream and the stream is passed through a catalytic unit wherein the hydrogen is combusted and then through a first metal getter bed operating in parallel with a second bed wherein the metal getter is converted to its oxide form. When breakthrough is detected in either bed, the flows of the first and second noble gas streams are rerouted to the other beds, respectively.

Procédé pour la récupération et la purification d'un circuit de gaz rares contaminé par de petites quantités d'hydrogène et/ou d'autres getters combustibles. Un procédé comprend la division du circuit de gaz rares en deux circuits. Le premier circuit de gaz rares est dirigé vers un deuxième getter métallique contenant un lit de getter métallique à l'état oxydé sur lequel l'hydrogène est brûlé. De l'oxygène est ajouté au deuxième circuit de gaz rares et ce circuit passe dans une unité catalytique dans laquelle l'hydrogène est brûlé, puis sur un premier lit de getter métallique fonctionnant en parallèle avec un second getter métallique sur lequel le métal est converti en son oxyde. Quand une saturation est détectée dans l'un des lits, les flux du premeir et du second circuits de gaz rares sont redirigés vers d'autres lits.

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