Refrigeration – Processes – Circulating external gas
Patent
1990-03-20
1991-12-31
Bennet, Henry A.
Refrigeration
Processes
Circulating external gas
62 18, 62 24, 62 36, 62 42, 62 44, F25J 302, F25J 304
Patent
active
050768239
ABSTRACT:
This invention relates to an improved process for the cryogenic separation of air and particularly with respect the separation of air in oxygen enriched zones within a distillation column. The improvement resides in utilizing aluminum packing in structured or random form in the oxygen enriched zones wherein the oxygen concentration ranges from about 80 to 96% by volume and optionally a sheet copper packing of structured or random form in the oxygen enriched zones, wherein the oxygen concentration is greater than 97% by volume. The aluminum packing may also be used in an argon column where argon is separated from oxygen by distillation.
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patent: 4623454 (1986-11-01), Tauscher et al.
patent: 4813988 (1989-03-01), Bennett et al.
patent: 4836836 (1989-06-01), Bennett et al.
patent: 4838913 (1989-06-01), Victor et al.
patent: 4842625 (1989-06-01), Allam et al.
patent: 4871382 (1989-10-01), Thorogood
patent: 4921641 (1990-05-01), Lavin
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ASTM Designation G94-88, "Standard Guide for Evaluating Metals for Oxygen", pp. 12-20.
Dunbobbin Brian R.
Hansel James G.
Werley Barry L.
Air Products and Chemicals Inc.
Bennet Henry A.
Brewer Russell L.
Kilner Christopher B.
Marsh William F.
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