Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Reexamination Certificate
2008-09-09
2008-09-09
Doerrier, William C (Department: 3744)
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
C062S903000
Reexamination Certificate
active
11154630
ABSTRACT:
A cryogenic air separation system wherein nitrogen vapor from a higher pressure column and oxygen liquid from a lower pressure column each pass down through a once-through main condenser in heat exchange relation and some but not all of the oxygen liquid is vaporized such that the oxygen liquid and vapor exit the condenser in a liquid to vapor mass flowrate ratio within the range of from 0.05 to 0.5 whereby the need for a recirculation pump to ensure avoidance of oxygen boiling to dryness is eliminated.
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Chakravarthy Vijayaraghavan Srinivasan
Jibb Richard John
Lockett Michael James
Royal John Henri
Doerrier William C
Praxair Technology Inc.
Rosenblum David M.
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