C - Chemistry – Metallurgy – 10 – K
Patent
C - Chemistry, Metallurgy
10
K
23/344, 48/46
C10K 3/00 (2006.01) B01D 53/34 (2006.01) B01D 53/52 (2006.01)
Patent
CA 1153892
-14- ASBTRACT OF THE DISCLOSURE Sour industrial gases containing carbon diox- ide and hydrogen sulfide are treated with aqueous amine absorbents to remove the CO2 and H2S. The absorbent con- taining or loaded with H2S and CO2 is regenerated and the off gas containing concentrated amounts of H2S and CO2 is treated in a second amine absorber to produce an absorbent loaded with H2S. This amine is then regenerated to pro- vide an off gas containing a high ratio of H2S to CO2 which can be used as the feed gas to a sulfur recovery unit. The process is automatically controlled so that the concentration of H2S in the second amine absorber is concentrated and controlled at a desired point so that the off gas has the required H2S/CO2 ratio. 28,065-F -14-
381806
Martin Charles W.
Pearce Roscoe L.
Smart & Biggar
The Dow Chemical Company
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