Gas scrubbing methods

Details Gas scrubbing methods Gas scrubbing methods

1982-04-26

1983-10-11

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423243, 252180, C01B 1700

Patent

active

044091923

ABSTRACT:
The present invention is directed to a method of removing sulfur dioxide from flue gases derived from furnaces burning high sulfur content fuels. The method comprises spraying flue gases with an aqueous medium containing (i) a material either dissolved or slurried therein, which material reacts with the sulfur dioxide in the flue gas to produce calcium sulfate and calcium sulfite, and (ii) a composition comprising a substantially linear water-soluble sulfonated polystyrene, and an organo-phosphonic acid derivative having the structural formula (X).sub.2 N--R--N(X).sub.2 where R is a lower alkyl of from 1 to 7 carbon atoms, X is hydrogen or the group -- CH.sub.2 PO.sub.3 M.sub.2, where M is a water-soluble cation, the compound being further characterized in that at least one but preferably all X's are --CH.sub.2 PO.sub.3 M.sub.2. In certain instances it is desirable to use in conjunction with the invention a water-soluble lignosulfonate.

REFERENCES:
patent: 3630937 (1971-12-01), Baum et al.
patent: 3801699 (1974-04-01), Arnold
patent: 3880620 (1975-04-01), Lange et al.
patent: 4342733 (1982-08-01), Skelhammer et al.

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