Process for the desulfurization of sulfur dioxide-containing...

Details Process for the desulfurization of sulfur dioxide-containing... Process for the desulfurization of sulfur dioxide-containing...

B - Operations, Transporting

01

D

B01D 53/14 (2006.01) B01D 53/50 (2006.01) C01B 17/04 (2006.01) C01B 17/05 (2006.01) C01B 17/16 (2006.01)

Patent

CA 2122955

PROCESS FOR THE DESULFURIZATION OF SULFUR DIOXIDE-CONTAINING GASES ABSTRACT The process of invention provides a simplified conversion of sulfur dioxide gas into hydrogen sulfide gas. First, sulfur dioxide gas is absorbed into an aqueous sulfide solution to form sulfite and bisulfide ions. Second, additional sulfur dioxide gas is absorbed into the aqueous solution to form hydrogen sulfide. Third, another portion of the sulfur dioxide is absorbed and reacts in the aqueous solution to form bisulfite. Most advantageously, the bisulfite is decomposed into sulfur dioxide and sulfite. The sulfite is then reduced to sulfide and returned for use in the absorption process. The hydrogen sulfide may then be reacted with SO2 via the Claus reaction to form elemental sulfur.

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