Refrigeration – Processes – Circulating external gas
Patent
1988-10-06
1989-09-19
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 42, 62 44, F25J 300
Patent
active
048677736
ABSTRACT:
A process is set forth for recovery of nitrogen from a feed gas stream, containing nitrogen and oxygen, using a cryogenic separation wherein a recycle stream having an oxygen content above that of the feed gas stream is recycled separately and independent of the feed gas stream to the cryogenic separation zone without any intervening process step that would decrease the oxygen content of the recycle stream.
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Celar et al., "Flexible Process of Pressure Nitrogen and Low Pressure Oxygen Production", Proceedings of XVIIth International Congress of Refrigeration, Vienna, 1987.
Hopkins Jeffrey A.
Roden Thomas M.
Thorogood Robert M.
Air Products and Chemicals Inc.
Capossela Ronald C.
Chase Geoffrey L.
Marsh William F.
Simmons James C.
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