Refrigeration – Processes – Circulating external gas
Patent
1990-02-02
1991-01-08
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 24, 423219, F25J 306
Patent
active
049831941
ABSTRACT:
A process for making high purity argon is disclosed in which crude argon containing less than about 0.8 mol % oxygen is recovered from air in a cryogenic distillation system, the crude argon is purified by removing oxygen in a getter system, and other impurities are removed by cryogenic distillation to yield a high purity argon product. The crude argon purification system is heat integrated with the main cryogenic air separation system. High purity argon can be produced at argon recoveries greater than 90% by utilizing structured packing in at least a portion of the argon sidearm column.
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A. S. Barabash, et al, Catalyst and Adsorption Chemical Treatment for Removing Oxygen from Inert Gases, Hydrogen and Methane pp. 1-6.
Agrawal Rakesh
Feldman Steven L.
Hopkins Jeffrey A.
McGuinness Roger M.
Air Products and Chemicals Inc.
Capossela Ronald C.
Fernbacher John M.
Marsh William F.
Simmons James C.
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