Cryogenic system for producing low-purity oxygen

Details Cryogenic system for producing low-purity oxygen Cryogenic system for producing low-purity oxygen

1978-08-23

1980-09-23

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

60 3955, 62 38, F25J 304

Patent

active

042240450

ABSTRACT:
Low-purity oxygen is produced by fractional distillation of liquefied air. A gas turbine, powered in part by waste nitrogen from the distillation, supplies energy to compress the feed air. Compressing the waste nitrogen prior to turbine expansion provides an increase in energy efficiency.

REFERENCES:
patent: 2520862 (1950-08-01), Swearingen
patent: 3605422 (1971-09-01), Pryor et al.
patent: 3693347 (1971-05-01), Kydd et al.
patent: 3731495 (1973-05-01), Coveney
patent: 3982878 (1975-10-01), Yamane et al.

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