Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1975-08-11
1978-03-14
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423229, B01D 5334
Patent
active
040791173
ABSTRACT:
A continuous process for acid gas removal such as the removal of carbon dioxide, from a feed mixture of process gas and acid gas which comprises introducing the gaseous feed mixture to an absorption zone at an absorption zone inlet temperature in the range of about 35.degree. C. to 150.degree. C., treating the gaseous feed mixture in the absorption zone with an aqueous solution of alkanolamine under specified conditions, the absorption zone inlet temperature for the solution being in the range of about 30.degree. C. to about 75.degree. C., passing the aqueous solution of alkanolamine having acid gas absorbed therein to a stripping zone at an inlet temperature essentially the same as the absorption zone outlet temperature for said solution, removing solution from the bottom of the stripping zone at a bottoms outlet temperature in the range of about 100.degree. C. to about 150.degree. C., and wherein the conditions in the absorption zone are selected so as to provide an absorption zone outlet temperature for the aqueous alkanolamine solution having acid gas absorbed therein in a range the lowest point of which is no lower than 22.degree. C. less than the bottom outlet temperature of the stripping zone and the highest point of which is about 150.degree. C.
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Terminello Dominic J.
Thomas Earl C.
Union Carbide Corporation
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