Effluent gas desulfurization with conversion to gypsum of large

Details Effluent gas desulfurization with conversion to gypsum of large Effluent gas desulfurization with conversion to gypsum of large

1985-06-20

1986-05-06

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423555, 436119, 436122, C01B 1700, C01F 1146, G01N 3300

Patent

active

045871124

ABSTRACT:
Sulfur dioxide-containing effluent gases are desulfurized by contact with a slurry consisting essentially of water, a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide and calcium carbonate, and an oxidizing agent selected from the group consisting of oxygen and hydrogen peroxide. In order to convert the sulfur dioxide to calcium sulfate of maximum particle size, the slurry is analyzed for content of said oxidizing agent, which is preferably maintained at a level to provide the oxidizing equivalent of an oxygen partial pressure of about 1-50 torr therein.

REFERENCES:
patent: Re31236 (1983-05-01), Saitoh et al.
patent: 3733393 (1973-05-01), Couillaud et al.
patent: 4424197 (1984-01-01), Powell et al.
patent: 4503020 (1985-03-01), Weissert
patent: 4533531 (1985-08-01), Shinoda et al.

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