Process and device for production of nitrogen

Details Process and device for production of nitrogen Process and device for production of nitrogen

1987-04-01

1991-08-06

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 38, 62 43, F25J 302

Patent

active

050374621

ABSTRACT:
In a process for production of nitrogen by low-temperature rectification of air, the air is compressed and divided into two partial streams of which the first partial stream is cooled and fed to a rectification zone, while the second partial stream is further compressed, cooled, expanded and then also fed to the rectification zone. The first partial stream, before it is fed to the rectification zone, is brought into heat exchange relation with the bottom liquid of the rectification zone. A nitrogen product stream is removed from an upper section of the rectification zone.

REFERENCES:
patent: 3280574 (1966-10-01), Becker
patent: 3620032 (1971-11-01), Simonet
patent: 3886758 (1975-06-01), Perrotin et al.
patent: 4222756 (1980-09-01), Thorogood
patent: 4401188 (1983-08-01), Patel et al.
patent: 4530708 (1985-07-01), Nakazoto et al.
patent: 4566887 (1986-01-01), Openshaw
patent: 4594085 (1986-06-01), Cheung

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