Patent ID: 7189381

Claim:
A method of scrubbing lower mass sulfides with a sulfide scrubbing medium capable of regeneration, comprising the steps of: providing at least three vessels containing sulfide scrubbing medium, and connective piping allowing gas to be directed sequentially through the at least three vessels in any selected sequential order; flowing the gas together with an oxidizing agent in a combined gas stream sequentially through the at least three vessels; changing the sequential order of the combined gas stream through the at least three vessels, as required, in order that: a first of the at least three vessels is maintained in a scrubbing mode, scrubbing to breakthrough sulphur from the gas that passes through it; a second of the at least three vessels is maintained in a conditioning mode, sulfide scrubbing medium in the vessel removing any residue of sulphur from the gas while being conditioned by such limited exposure to sulphur; and a third of the at least three vessels is maintained in a regeneration mode, saturated sulfide scrubbing medium in the vessel removing excess oxygen from the gas while being regenerated by such exposure to oxygen.