Air distillation apparatus comprising regenerator means for prod

Details Air distillation apparatus comprising regenerator means for prod Air distillation apparatus comprising regenerator means for prod

1974-12-06

1977-04-12

Lutter, Frank W.

Refrigeration

Storage of solidified or liquified gas

With sorbing or mixing

62 13, 62 29, 62 42, F25J 304

Patent

active

040172848

ABSTRACT:
A method and apparatus for producing high purity oxygen gas wherein input ambient air is pressurized and then liquefied by passing the air in heat exchange relationship with a bath of liquid oxygen at the bottom of a distillation column having a cryogenic refrigeration source at the top thereof. The liquefied air is separated in the column into the oxygen and nitrogen components thereof, and high purity oxygen gas is collected. The oxygen gas is passed in heat exchange relationship with the input air to precool the input air before it is liquefied, and this is done in a regenerator having two identical portions each provided with separate regions through which air and oxygen flow in heat exchange relationship and having a switching valve means to alternate the flow of air through the portions.

REFERENCES:
patent: 1573752 (1926-02-01), Seligmann
patent: 1602535 (1926-10-01), LeRouge
patent: 2209748 (1940-07-01), Schlitt
patent: 2505774 (1950-05-01), Holm et al.
patent: 2585912 (1952-02-01), Buschow
patent: 2820352 (1958-01-01), Fokker et al.
patent: 2824433 (1958-02-01), Kohler
patent: 2836969 (1958-06-01), Kohler
patent: 3059439 (1962-10-01), First et al.
patent: 3304999 (1967-02-01), Ward
patent: 3517521 (1970-06-01), Emerson

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