US Patent 7862645 Removal of gaseous contaminants from argon
Patent 7862645 was granted and assigned to AIR PRODUCTS AND CHEMICALS, INC. on January, 2011 by the United States Patent and Trademark Office.
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Method for argon recovery that comprises (a) providing a feed gas mixture comprising argon and nitrogen; (b) contacting at least a portion of the feed gas mixture with a nitrogen-selective adsorbent in a cyclic pressure swing adsorption process and adsorbing at least a portion of the nitrogen on the adsorbent in a first pressure range above 100 psia to provide a purified argon product and an adsorbent comprising adsorbed nitrogen; and (c) desorbing the adsorbed nitrogen in one or more regeneration steps effected in a second pressure range between atmospheric pressure and a super-atmospheric pressure below any pressure in the first pressure range, inclusive; wherein the cyclic pressure swing adsorption process is effected at an average operating temperature of at least about 0° C.
US Patent 07862645 Removal of gaseous contaminants from argon US Patent 7862645 Removal of gaseous contaminants from argon
US Patent 07862645 Removal of gaseous contaminants from argon
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