Process for low-temperature air fractionation

Details Process for low-temperature air fractionation Process for low-temperature air fractionation

1992-03-25

1993-11-23

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 38, F25J 302

Patent

active

052633284

ABSTRACT:
For the low-temperature fractionation of air, especially for the production of medium purity oxygen, the entire feed air (1) is compressed in a first compressor stage (2) and purified by adsorption (4). A first component stream (101) of the air is introduced into the high-pressure stage (7) of a two-stage rectifying column (6). A second component stream is passed to the low-pressure stage (8), and this stream is separated, after adsorption (4), from the remaining feed air, heated against compressed feed air (3), and engine-expanded (13). The thus-produced work is utilized at least in part for the compression (2) of feed air.

REFERENCES:
patent: 4152130 (1979-05-01), Theobald
patent: 4303428 (1981-12-01), Vandenbussche
patent: 4715873 (1987-12-01), Auvil et al.
patent: 4746343 (1988-05-01), Ishizu et al.
patent: 4883518 (1989-11-01), Skolaude et al.
patent: 5080703 (1992-01-01), Rathbone
patent: 5114449 (1899-05-01), Agrawal et al.

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