Process for low-temperature air fractionation

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

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/04 (2006.01)

Patent

CA 2063928

For the low-temperature fractionation of air, espe- cially 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 compo- nent 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 com- pressed feed air (3), and engine-expanded (13). The thus-produced work is utilized at least in part for the compression (2) of feed air.

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