Gas scrubbing methods

Details Gas scrubbing methods Gas scrubbing methods

B - Operations, Transporting

01

D

23/350

B01D 53/14 (2006.01) B01D 53/50 (2006.01) C02F 5/14 (2006.01)

Patent

CA 1182983

Abstract of the Disclosure 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)2N - R - N(X)2 where R is a lower alkyl of from 1 to 7 carbon atoms, X is hydrogen or the group - CH2PO3M2, where M is a water-soluble cation, the compound being further characterized in that at least one but preferably all X's are - CH2PO3M2. In certain instances it is desirable to use in conjunction with the invention a water-soluble lignosulfonate.

424390

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