Method of producing gaseous oxygen and a cryogenic plant in whic

Details Method of producing gaseous oxygen and a cryogenic plant in whic Method of producing gaseous oxygen and a cryogenic plant in whic

1981-07-15

1983-02-08

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 18, 62 41, 62 38, F25J 304

Patent

active

043727646

ABSTRACT:
In a pumped liquid oxygen plant the liquid oxygen is vaporized and warmed against part of the feed air which is compressed in compressor (15) and divided into a first sub-stream (20) at 56.4 bars A and a second sub-stream (16) at 42 bars A. The first sub-stream (20) is cooled against the evaporating oxygen in the heat exchanger (17). It is then expanded at valve (21) and the largely (on a molar basis) liquid product is fed to the high pressure column (10) through pipe (22). The second sub-stream is cooled in heat exchanger (17) and is then expanded in generator loaded expander (18). The cold gas in then used to cool the first sub-stream in heat exchanger (17) and is recycled to the compressor (15).

REFERENCES:
patent: 2873583 (1959-02-01), Potts et al.
patent: 3216206 (1965-11-01), Kessler
patent: 3426543 (1969-02-01), Becker
patent: 3967464 (1976-07-01), Cormier et al.

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