Process for purifying gases containing sulphur dioxide

Details Process for purifying gases containing sulphur dioxide Process for purifying gases containing sulphur dioxide

1984-09-06

1985-12-17

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

C01B 1700

Patent

active

045592128

ABSTRACT:
Process for removal of sulphur dioxide from exhaust gases by absorption in an aqueous solution containing ions of adipic acid, and stripping of sulphur dioxide with steam. Solid adipic acid is added to the absorption solution before or during the steam stripping in such an amount that all the acid is dissolved at the stripping temperature, and after the stripping the solution is cooled to substantially below the absorption temperature to precipitate solid adipic acid which is separated off and is added again after the absorption which takes place with a solution which is unsaturated with adipic acid.

REFERENCES:
patent: 1908731 (1933-05-01), Clark
patent: 3798309 (1974-03-01), Knowles et al.
patent: 4133650 (1979-09-01), Germerdonk
patent: 4423018 (1983-12-01), Lester et al.
ERPI publication, "Aqueous Absorbents for Stack Gas Desulfurization by Absorption Stripping, Jul. 1983.

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