Process for the desulfurization of sulfur dioxide-containing gas

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

1994-05-10

2000-02-29

Griffin, Steven P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

G01R 1720

Patent

active

060305924

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 SO.sub.2 via the Claus reaction to form elemental sulfur.

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Muller et al. --"Potentiometric Investigation of the Formation of Thiosufate from Alkali Sulfide and Sulfurous acid" Angwandte Chemie, 47 Jahrg. 1934, Nr. 9 (No Month).

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