Refrigeration – Processes – Circulating external gas
Patent
1986-08-20
1987-11-03
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 32, 62 43, F25J 302
Patent
active
047041471
ABSTRACT:
In a process for the production of an oxygen-enriched air product, feed air is fed to the main heat exchangers at two pressures. The high pressure feed air from the main exchanger is partially condensed to vaporize the oxygen-enriched air product. This partially condensed feed air is separated with the vapor phase being warmed and expanded to supply refrigeration and subsequently being fed to the low pressure fractionation section, and the liquid phase being used to reflux both the high pressure and low pressure fractionation sections of a double distillation column. The low pressure feed air from the main heat exchangers is fed to the high pressure fractionation section. The high pressure fractionation section condenser is used to provide reboiler duty to the low pressure fractionation section.
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Air Products and Chemicals Inc.
Capossela Ronald C.
Innis E. Eugene
Jones II Willard
Simmons James C.
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