Process for the removal of sulfur oxide from waste gas

Details Process for the removal of sulfur oxide from waste gas Process for the removal of sulfur oxide from waste gas

1976-12-23

1978-10-24

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423166, C01B 1700

Patent

active

RE0298131

ABSTRACT:
A process, in which sulfur dioxide gas contained in waste gas is removed therefrom and collected as gypsum. In said process, the waste gas is subjected to a flow of detergent solution of basic aluminium sulfate so that the sulfur dioxide is absorbed into the solution. This solution, now containing the sulfur dioxide, is thereafter subjected to oxidation, resulting in a decrease in the basicity thereof. The solution is then neutralized by calcium carbonate or calcium hydroxide, whereby gypsum is precipitated in the solution and collected therefrom and whereby the crude content of the solution is recovered so that it may be used again as a detergent for the waste gas.

REFERENCES:
patent: 2311202 (1943-02-01), Barwasser et al.
patent: 2926999 (1960-03-01), Tarbutton et al.
patent: 3556722 (1971-01-01), Owaki

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