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US 6,041,621 AGranted
Single circuit cryogenic liquefaction of industrial gas
AssigneePraxair Technology, Inc.
InventorsWalter Joseph Olszewski, Bayram Arman, Joseph Alfred Weber, Arun Acharya
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Abstract
A method for more efficiently liquefying industrial gas wherein refrigeration for the liquefaction is generated using a defined multicomponent refrigerant fluid and provided by a single flow circuit over a wide temperature range from ambient to cryogenic temperature.
Claims11
A method for liquefying an industrial gas comprising:
- (A) compressing a multicomponent refrigerant fluid comprising at least one component from the group consisting of fluorocarbons, hydrofluorocarbons and fluoroethers and at least one component from the group consisting of fluorocarbons, hydrofluorocarbons, fluoroethers and atmospheric gases;
- (B) cooling the compressed multicomponent refrigerant fluid to at least partially condense the multicomponent refrigerant fluid;
- (C) expanding the cooled compressed multicomponent refrigerant fluid to generate refrigeration;
- (D) warming the expanded multicomponent refrigerant fluid by indirect heat exchange with the compressed multicomponent refrigerant fluid to effect said cooling of the compressed multicomponent refrigerant fluid;
- and
- (E) bringing the expanded multicomponent refrigerant fluid into heat exchange relation with industrial gas and warming the expanded multicomponent refrigerant fluid by indirect heat exchange with said industrial gas to liquefy the industrial gas.
3 more elements
Dependencies are inferred from the claim text.