Production of ultra-high purity oxygen from cryogenic air...

Details Production of ultra-high purity oxygen from cryogenic air... Production of ultra-high purity oxygen from cryogenic air...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/04 (2006.01)

Patent

CA 2183931

The present invention relates to an improvement to cryogenic air separation processes which produce an ultra-high purity oxygen product and nitrogen and/or commercial purity oxygen products. In particular, the improvement of the presentinvention is characterized by removing a portion of liquid descending the distillation column system from the distillation section proximate to the location for withdrawing the oxygen-containing side-draw stream.

La présente invention porte sur une amélioration des procédés cryogéniques de fractionnement de l'air, produisant de l'oxygène ultra-pur et de l'azote et (ou) de l'oxygène de pureté commerciale. L'amélioration de la présente invention se caractérise notamment par le fait qu'une partie du liquide descendant la colonne de distillation est retirée de la section de distillation au voisinage du point de prélèvement du flux latéral renfermant l'oxygène.

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