Sulfur dioxide removal process

Details Sulfur dioxide removal process Sulfur dioxide removal process

1985-11-18

1987-01-06

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423575, C01B 1700, C01B 1702

Patent

active

046345825

ABSTRACT:
A process for removing sulfur dioxide from a gas stream by absorption in a buffered, aqueous thiosulfate and polythionate solution followed by regeneration of the enriched solution with hydrogen sulfide to form sulfur wherein excess hydrogen sulfide recovered from the regeneration step is introduced to the absorption step to reduce bisulfite concentration in the enriched solution.

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Vasan, "The Citrex Process for SO.sub.2 Removal", Chemical Engineering Progress, vol. 71, No. 5, May 1975, pp. 61-65.
Korosy, Gewanter, Chalmers, Vansan, "Chemistry of SO.sub.2 Absorption and Conversion to Sulfur by the Citrate Process", 167th American Chemical Society National Meeting, Los Angeles, Calif. Apr. 5, 1974.

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