Refrigeration – Processes – Circulating external gas
Patent
1990-03-06
1991-09-17
Bennett, Henry A.
Refrigeration
Processes
Circulating external gas
62 22, 62 27, 62 38, 62 39, F25J 304, F25J 302
Patent
active
050491733
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 commercial purity oxygen products. In particular, the improvement comprises removing or producing an oxygen-containing but heavy contaminant-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., contaminant concentration <10 vppm).
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Agrawal Rakesh
Cormier, Sr. Thomas E.
Prentice Alan L.
Woodward Donald W.
Air Products and Chemicals Inc.
Bennett Henry A.
Jones II Willard
Kilner Christopher B.
Marsh William F.
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