Method of removing sulfur dioxide from flue gases

Details Method of removing sulfur dioxide from flue gases Method of removing sulfur dioxide from flue gases

1975-01-31

1978-01-24

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423522, 423558, 71 30, C01B 1700, C01B 1772

Patent

active

040704416

ABSTRACT:
The sulfur dioxide containing flue gases are passed through a gas scrubber containing an aqueous solution of a metal salt which can be reduced by sulfur dioxide from a high valence state to a lower valence state. This oxidizes the sulfur dioxide to either sulfur trioxide or sulfuric acid which dissolves in the solution. The sulfur compound containing solution is removed from the first gas scrubber and placed in a regeneration gas scrubber through which air is passed. The oxygen in the air oxidizes the reduced metal salt and thereby regenerates the solution to its original composition. The regenerated solution is then recycled to the first gas scrubber where further removal of sulfur dioxide from the flue gas occurs.

REFERENCES:
patent: 3565575 (1971-02-01), Warshaw
patent: 3836630 (1974-09-01), Noguchi et al.
patent: 3848058 (1974-11-01), Poncet et al.

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