Control of thiosulfate in wet desulfurization process solutions

Details Control of thiosulfate in wet desulfurization process solutions Control of thiosulfate in wet desulfurization process solutions

1980-11-28

1983-01-04

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423226, C01B 1704

Patent

active

043672124

ABSTRACT:
A method for controlling the concentration of dissolved thiosulfate byproduct which forms in a wet desulfurization process, by introducing a peroxygen chemical into its recirculating aqueous absorption medium. A peroxygen chemical such as aqueous hydrogen peroxide is introduced into the recirculating aqueous alkaline absorption medium, preferably after its regeneration, in an amount sufficient to maintain the concentration of thiosulfate byproduct below a saturation concentration. The method is applicable to cyclic wet desulfurization processes, used to recover elemental sulfur from H.sub.2 S-containing gas streams, in which the absorption medium contains a regenerable oxidizing agent and is subject to thiosulfate byproduct buildup.

REFERENCES:
patent: 3972989 (1976-08-01), Fenton et al.
patent: 4083945 (1978-04-01), Fenton et al.
Kirk-Othmer; Encyc. of Chem. Tech., vol. 20.

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