Process and installation for producing nitrogen under pressure

Details Process and installation for producing nitrogen under pressure Process and installation for producing nitrogen under pressure

1986-03-06

1988-01-05

Yuen, Henry C.

Refrigeration

Processes

Circulating external gas

62 39, 62 41, F25J 302

Patent

active

047174102

ABSTRACT:
The rich liquid received at the base of the main column (3) at high pressure is expanded in two stages. After the first expansion to medium pressure, it is distilled so as to produce an addition of pure nitrogen. The second expansion achieves the reflux in the medium pressure column (4). Liquid nitrogen is pumped from this column to the high pressure column (3) and all the nitrogen can be produced at high pressure.

REFERENCES:
patent: 3267684 (1966-08-01), Jakob
patent: 3416323 (1968-12-01), Heinik
patent: 3760596 (1973-09-01), Basin et al.
patent: 4420317 (1983-12-01), Stewart
patent: 4453957 (1984-06-01), Pahade et al.
patent: 4464188 (1984-08-01), Agrawal et al.
patent: 4556404 (1985-12-01), Shenoy et al.

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