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US 6,023,945 AGranted
Annular column for cryogenic rectification
AssigneePraxair Technology, Inc.
InventorsKenneth Kai Wong, John Frederic Billingham, Dante Patrick Bonaquist, Bayram Arman, Raymond Francis Drnevich, Minish Mahendra Shah, Todd Alan Skare
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Abstract
An annular column, particularly useful for cryogenic rectification, comprising coaxially oriented, radially spaced cylindrical column walls defining a first column region, and a second column region between the walls, wherein different fluid mixtures are rectified in each of the first column and second column regions.
Claims1
Apparatus for carrying out cryogenic rectification of feed air comprising:
- (A) an annular column comprising a cylindrical main column wall defining a lower pressure region, and an annular column wall radially spaced from the main column wall demarcating a higher pressure region between the main column wall and the annular column wall;
- (B) means for passing feed air into the higher pressure region, and means for passing fluid from the higher pressure region into the lower pressure region;
- and
- (C) means for recovering at least one of product nitrogen and product oxygen from the lower pressure region.
1 more element
Dependencies are inferred from the claim text.