Removal of hydrogen sulfide from gases

Details Removal of hydrogen sulfide from gases Removal of hydrogen sulfide from gases

1975-04-07

1977-03-29

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C01B 1704

Patent

active

040149838

ABSTRACT:
Hydrogen sulfide is removed from a gas stream by reaction with sulfur dioxide to form sulfur in the presence of an aqueous chelated iron solution as a catalyst or oxidation-reduction reagent. The reaction of hydrogen sulfide with sulfur dioxide is carried out in a first contacting zone, and the chelated iron solution is contacted with sulfur dioxide in a second contacting zone and then recycled to the first contacting zone. As applied to the treatment of a Claus process tail gas, the first contacting zone is interposed before the tail gas incinerator, and the second contacting zone is used to remove sulfur dioxide from the incinerator effluent gas.

REFERENCES:
patent: 2881047 (1969-04-01), Townsend

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