Method for desulfurizing exhaust gas

Details Method for desulfurizing exhaust gas Method for desulfurizing exhaust gas

1995-10-03

1997-10-14

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

42324308, B01D 5350

Patent

active

056769156

ABSTRACT:
A method for desulfurization of an exhaust gas by a solution containing a Mg-based desulfurizing agent, followed by an oxidation step, a double decomposition step, a separation step of separating a slurry of a mixture of Mg(OH).sub.2 and gypsum dihydrate obtained in the double decomposition step, a step of returning a Mg(OH).sub.2 slurry separated in the separation step to the desulfurization step, a step of treating a gypsum dihydrate slurry in the oxidation step to convert accompanying Mg(OH).sub.2 into MgSO.sub.4, a sedimentation separation step of separating gypsum dihydrate, and a step of returning a supernatant liquid in the sedimentation separation step to the double decomposition step to treat the supernatant liquid

REFERENCES:
Practical Antipollution Technology Handbook Published by Chemical Industry Company, Ltd. (1 Jun. 1975) (In Japanese Language, No Author Mentioned), pp. 14-17.
"Gas Purification" by Kohl et al., 4th Ed., Gulf Publishing Co. Houston TX (1985), pp. 334-340 (No Month).

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