Cryogenic systems for producing low purity oxygen

Details Cryogenic systems for producing low purity oxygen Cryogenic systems for producing low purity oxygen

F - Mech Eng,Light,Heat,Weapons

25

J

162/127

F25J 3/04 (2006.01) C01B 13/02 (2006.01)

Patent

CA 1093455

D-10882 CRYOGENIC SYSTEM FOR PRODUCING LOW-PURITY OXYGEN ABSTRACT Low purity oxygen is produced by fractional dis- tillation of liquefied air in a double distillation column ant an auxiliary distillation column. Feed air is supplied at two different pressures. The disclosed methods of handling intermediate oxygen-enriched liquid produced by the two columns and removing nitrogen-rich gas from the auxiliary distillation column permit the system to operate with lower energy requirements ant smaller column diameter than conventional systems.

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