Process for purifying a sulfur dioxide containing gas

Details Process for purifying a sulfur dioxide containing gas Process for purifying a sulfur dioxide containing gas

1976-03-29

1977-09-13

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423242, C01B 1704

Patent

active

040482936

ABSTRACT:
This process for purifying a sulfur dioxide containing gas, for example stack gas, comprises the steps of washing the gas with aqueous ammonia or ammonium sulfite, vaporizing sulfur dioxide and ammonia therefrom, reacting vaporized sulfur dioxide with hydrogen sulfide and recycling an ammonia containing stream. To avoid the drawbacks resulting from the presence of hydrogen sulfide in the recycle stream, a further oxidation step is provided to convert hydrogen sulfide to sulfur dioxide.

REFERENCES:
patent: 2083894 (1937-06-01), Connolly
patent: 3839549 (1974-10-01), Deschamps et al.
patent: 3875295 (1975-04-01), Barthel et al.
patent: 3882222 (1975-05-01), Deschamps et al.
patent: 3883638 (1975-05-01), Renault et al.
patent: 3895101 (1975-07-01), Tsuruta
patent: 3896215 (1975-07-01), Bratzler et al.

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