Method for purifying a cryogenic fluid by filtration and...

C - Chemistry – Metallurgy – 01 – B

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C01B 23/00 (2006.01) B01D 15/00 (2006.01) B01D 53/04 (2006.01) C01B 3/50 (2006.01) F17C 7/00 (2006.01) F17C 9/00 (2006.01) F17C 13/00 (2006.01) F25J 3/08 (2006.01)

Patent

CA 2275962

The invention concerns a method for purifying a cryogenic fluid selected from the group formed by helium, hydrogen, deuterium, argon, neon, xenon or krypton in liquid state, diphase, gaseous or supercritical, having a boiling point Pe, in one at least of its impurities having a boiling point Pe', with Pe' > Pe, comprising at least: a step of filtering at least one impurity in solid state using a mechanical filter; and a step of adsorption of at least one impurity in liquid or gaseous state; and in which at least part of the cryogenic fluid at least partially purified is recuperated, said fluid containing not more than 1 ppb of impurities. The invention also concerns a device for implementing the method.

Procédé de purification d'un fluide cryogénique choisi dans le groupe formé par l'hélium, l'hydrogène, le deutérium, l'argon, le néon, le xénon ou le krypton à l'état liquide, diphasique, gazeux ou supercritique, ayant un point d'ébullition Pe, en l'une au moins de ses impuretés ayant un point d'ébullition Pe', avec Pe' > Pe, comprenant au moins: une étape de filtration d'au moins une impureté à l'état solide au moyen d'un filtre mécanique; et une étape d'adsorption d'au moins une impureté à l'état liquide ou gazeux; et dans lequel on récupère au moins une partie du fluide cryogénique au moins partiellement épuré, ledit fluide contenant au plus environ 1 ppb d'impuretés. Dispositif de mise en oeuvre du procédé.

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