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

162/120

F25J 3/00 (2006.01) F25J 3/04 (2006.01)

Patent

CA 2037255

ABSTRACT The present invention relates to an improvement for the production of ultra-high purity oxygen from cryogenic air separation processes which produce nitrogen and/or commmerical purity oxygen products. In particular, the improvement comprises removing or producing an oxygen-containing but heavy comtaminants-lean (free) stream from one of the distillation columns of a single or multiple column cryogenic air separation facility and further stripping the removed or produced oxygen-containing stream in a fractionator to produce ultra-high purity oxygen (i.e. contaiminants concentration <10 vppm).

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