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US 6,269,658 B1Granted
Cryogenic rectification system with pulse tube refrigeration
AssigneePraxair Technology, Inc.
InventorsJohn Henri Royal, Arun Acharya, Christian Friedrich Gottzmann, Dante Patrick Bonaquist, Bayram Arman, Joseph Alfred Weber
Life of this patent
Estimating the term…
Abstract
A cryogenic rectification system wherein some or all of the refrigeration necessary to drive the rectification is generated by providing a pulse to a gas and then passing the compressed gas to a pulse tube wherein the gas expands in a wave generating refrigeration at one end of the pulse tube for transfer into the rectification system.
Claims13
A method for carrying out cryogenic rectification comprising:
- (A) passing feed into a cryogenic rectification plant comprising at least one column;
- (B) applying a compressive force to a pulse tube system gas to compress the pulse tube system gas, passing the compressed pulse tube system gas to a pulse tube, and expanding the pulse tube system gas within the pulse tube to generate refrigeration;
- (C) passing refrigeration generated by the pulse tube system gas into the cryogenic rectification plant;
- and
- (D) separating the feed by cryogenic rectification within the cryogenic rectification plant using refrigeration generated by the pulse tube system gas.
2 more elements
Apparatus for carrying out cryogenic rectification comprising:
- (A) a cryogenic rectification plant comprising at least one column and means for passing feed into the cryogenic rectification plant;
- (B) a pulse tube refrigeration system comprising a precooling means, a pulse tube, means for passing pulse tube system gas from the precooling means to the pulse tube, and means for applying a compressive force to the pulse tube system gas;
- (C) means for passing refrigeration from the pulse tube refrigeration system into the cryogenic rectification plant;
- and
- (D) means for recovering product from the cryogenic rectification plant.
2 more elements
Dependencies are inferred from the claim text.