Air separating method using external cold source

Details Air separating method using external cold source Air separating method using external cold source

1992-10-13

1993-06-22

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 37, 62 41, 62 502, F25J 302

Patent

active

052207986

ABSTRACT:
The invention concerns the separation of air with an external cold source. An internal cold source is provided to supply cold heat to a compressed inert gas by expansion of a part of a liquefied inert gas when the cold from the external cold source proves to be insufficient. This part of the liquefied inert gas is combined with recycling and compressed gases. The desired production of liquid oxygen and nitrogen is thus assured in spite of variations in the external cold source.

REFERENCES:
patent: 3535210 (1970-10-01), Linde et al.
patent: 3857251 (1974-12-01), Alleaume
patent: 3886758 (1975-06-01), Perrotin
patent: 4054433 (1977-10-01), Buffiere et al.
patent: 4192662 (1980-03-01), Ogata et al.
Yamanouchi et al.: Chemican Engineering Progress Jul. 1979 "Using LNG Cold for Air Separation".

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