Cryogenic air separation process for the production of nitrogen

Details Cryogenic air separation process for the production of nitrogen Cryogenic air separation process for the production of nitrogen

F - Mech Eng,Light,Heat,Weapons

25

J

162/120

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

Patent

CA 2037512

ABSTRACT The present invention is a cryogenic process for the production of nitrogen by distilling air in a double column distillation system comprising a high pressure column and a low pressure column. The critical step of the invention is the condensation of two nitrogen streams at different pressures in two reboiler/condensers located in the stripping section of the low pressure column to provide column reboil. The lower pressure of the two nitrogen streams is condensed in the upper of the two reboiler/condensers; the higher pressure nitrogen stream in the lower of the two reboiler/condensers.

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