Removal of sulfur and nitrogen containing pollutants from discha

Details Removal of sulfur and nitrogen containing pollutants from discha Removal of sulfur and nitrogen containing pollutants from discha

1985-02-08

1986-05-06

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423239, B01J 800, C01B 1700, C01B 2100

Patent

active

045871132

ABSTRACT:
Oxides of sulfur and of nitrogen are removed from waste gases by reaction with an unsupported copper oxide powder to form copper sulfate. The resulting copper sulfate is dissolved in water to effect separation from insoluble mineral ash and dried to form solid copper sulfate pentahydrate. This solid sulfate is thermally decomposed to finely divided copper oxide powder with high specific surface area. The copper oxide powder is recycled into contact with the waste gases requiring cleanup. A reducing gas can be introduced to convert the oxide of nitrogen pollutants to nitrogen.

REFERENCES:
patent: 3630943 (1971-12-01), Myers et al.
patent: 4170627 (1979-10-01), Ginger
patent: 4192855 (1980-05-01), Ginger
patent: 4246081 (1981-01-01), Winnick
patent: 4442078 (1984-04-01), Jalan et al.
patent: 4455286 (1984-06-01), Young et al.
Quarterly Report, U.S. Department of Energy, 1984.
Lowell et al., "Selection of Metal Oxides for Removing SO.sub.2 from Flue Gas, Ind. Eng. Chem.-Process Design Development, vol. 10, No. 3, 1971.

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