Process removing sulfur dioxide from gases

Details Process removing sulfur dioxide from gases Process removing sulfur dioxide from gases

1974-07-31

1976-08-03

Vertiz, Oscar R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423166, C01B 1700

Patent

active

039729800

ABSTRACT:
A sulfur dioxide containing gas stream is passed through a gas scrubber through which is circulated a scrubbing medium, preferably slurried, containing a reactant which reacts with the sulfur dioxide to produce sulfites and/or sulfates, a portion of which precipitate. At least a portion of the precipitated sulfites and/or sulfates are removed from the scrubbing medium which is rejuvenated with fresh reactant to maintain substantially steady state conditions in the scrubber. To minimize scaling in the scrubbing system, seed crystals of the sulfites and/or sulfates are introduced into the scrubbing medium, the seed crystals being in number and size so as to control the level of supersaturation of the scrubbing medium with respect to the sulfites and/or sulfates.

REFERENCES:
patent: 2090142 (1937-08-01), Nonhebel et al.
patent: 2090143 (1937-08-01), Nonhebel et al.
patent: 3708266 (1973-01-01), Gustavsson

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