Purification of carbon dioxide
AssigneeUop LLC
InventorsJames R. Lansbarkis, Jon S. Gingrich
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Abstract
Industrial grade carbon dioxide may contain unacceptable amounts of sulfur-containing materials, oxygen, and organic materials particularly detrimental to food-related uses of CO.sub.2. These can be effectively removed by a bed of silver-exchanged faujasite and an MFI-type molecular sieve. This permits an on-site, on-demand method of purifying CO.sub.2 ranging from laboratory to tank car seals.
Claims5
A method of purifying gaseous carbon dioxide comprising passing a stream of carbon dioxide through at least one bed of silver-exchanged faujasite and a MFI-type molecular sieve with a Si:Al ratio greater than about 10, where said faujasite and said sieve are in a proportion from about 1:3 to about 3:1, and recovering purified carbon dioxide having no more than 15 ppb COS, 1 ppm oxygen, and 10 ppt organic materials.
Dependencies are inferred from the claim text.