Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1997-09-09
1998-11-24
Capossela, Ronald
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62654, F25J 300
Patent
active
058392963
ABSTRACT:
An improved efficiency system for producing low purity oxygen by rectification of air employs a high pressure column and a low pressure column and includes the steps of: turboexpanding a flow of nitrogen-rich gas from the high pressure column to provide a cooled nitrogen-rich gas flow; condensing the cooled nitrogen-rich gas flow to a nitrogen-rich liquid against a flow of a vaporizing oxygen-rich liquid flow taken from the low pressure column; passing the nitrogen-rich liquid as a reflux flow to the low pressure column; returning the vaporizing oxygen liquid to the low pressure column; and employing energy derived from the turboexpanding step to compress feed air.
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Bonaquist Dante Patrick
Sattan Susan Marie
Capossela Ronald
Ktorides Stanley
Praxair Technology Inc.
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