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US 4,285,918 AGranted
Regenerative CO.sub.2 absorbent
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorPaul R. Gustafson
Life of this patent
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Abstract
Acid gases, such as CO.sub.2, can be extracted from a gaseous feed stream by contacting the exhausted inlet gas with an aqueous solution of 3-amino-1,2 propanediol, separating the regenerated feed stream from the aqueous amine solution and the acid gases dissolved therein, and further separating these dissolved acid constituents from the diol solution; finally, repeating the above cycle indefinitely.
Claims1
A process for the extraction of CO.sub.2 from the breathing air of a submarine comprising:
- creating an effective amount of an aqueous solution of 3-amino-1,2-propanediol;
- contacting the exhausted breathing air with the aqueous solution in order to extract CO.sub.2 from the air;
- separating the regenerated air from the aqueous solution and the CO.sub.2 gases dissolved therein;
- separating the dissolved CO.sub.2 gas constituents from the aqueous solution, thereby producing a regenerated aqueous solution;
- reusing the regenerated aqueous solution for the removal of additional CO.sub.2 by continually repeating the above cycle.
2 more elements
Dependencies are inferred from the claim text.