Process for desulfurization of sulfur dioxide-containing gas...

Details Process for desulfurization of sulfur dioxide-containing gas... Process for desulfurization of sulfur dioxide-containing gas...

B - Operations, Transporting

01

D

23/349

B01D 53/14 (2006.01) B01D 53/50 (2006.01)

Patent

CA 1309840

Abstract A process for desulfurizing sulfur dioxide-containing gases wherein the sulfur-containing gases are contacted with an aqueous solution of magnesium hydroxide in a wet scrubber, wherein magnesium sulfite and magnesium bisulfite are formed, a portion of spent scrubbing medium is subjected to oxidation to convert the magnesium sulfite and the magnesium bisulfite therein to magnesium sulfate, the oxidized product is contacted with a magnesium-containing lime slurry to obtain magnesium hydroxide and calcium sulfate, calcium sulfate is separated from the resulting product and the magnesium hydroxide is recycled to the scrubber.

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