Sulfur recovery from H.sub.2 S and SO.sub.2 -containing gases
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorsLarry A. Haas, Sanaa E. Khalafalla
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Abstract
Sulfur is recovered from gases containing H.sub.2 S and SO.sub.2 by absorption of the H.sub.2 S and SO.sub.2 in a glycol absorbent, and reaction of the H.sub.2 S and SO.sub.2 in solution in the absorbent in the presence of a solid catalyst.
Claims1
A process for recovery of sulfur comprising the steps of (1) loading of an absorbent selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, and propylene glycol with a mixture of hydrogen sulfide and sulfur dioxide by absorbing hydrogen sulfide, sulfur dioxide, or mixtures thereof from waste gases that additionally contain carbon dioxide, oxygen or nitrogen and (2) reacting the hydrogen sulfide and sulfur dioxide, in solution in the absorbent, in contact with a solid catalyst, the active ingredient of which is alumina.
Dependencies are inferred from the claim text.