Regenerative method for quantitative removal of sulfur dioxide f

Details Regenerative method for quantitative removal of sulfur dioxide f Regenerative method for quantitative removal of sulfur dioxide f

1977-02-22

1978-07-11

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423166, C01B 1700

Patent

active

041002601

ABSTRACT:
Sulfur dioxide is removed from stack gases by absorption in an aqueous medium, the preferred embodiment containing a chemical oxidant which generates hydrogen peroxide on a demand that equals the rate sulfur dioxide is absorbed into the medium whereby the absorbed sulfur dioxide is converted to sulfate form. The converted sulfur dioxide is removed in the form of an alkaline earth metal sulfate precipitate and spent oxidant is regenerated for reuse. In the other illustrated embodiments, the aqueous medium is maintained acidic from the start-up of the system. Barium peroxide is the preferred oxidant and acts both as oxidant and precipitant. Alternately, the oxidant and precipitant may be separate compounds.

REFERENCES:
patent: 1034646 (1912-08-01), Rabenalt
patent: 1519932 (1924-12-01), Reich
patent: 3873672 (1972-03-01), Nishiba et al.
The Condensed Chemical Dictionary, 6th ed. 1962 pp. 204, 608, 272-273.
Hackh's Chemical Dictionary, 4th ed. 1969 pp. 353, 156.

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