Method of washing hydrogen sulfide from coke oven gas by the amm

Details Method of washing hydrogen sulfide from coke oven gas by the amm Method of washing hydrogen sulfide from coke oven gas by the amm

1984-01-12

1985-05-21

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423238, B01D 5334

Patent

active

045185727

ABSTRACT:
An improved coke oven gas washing process for removing hydrogen sulfide is proposed wherein the coke oven gas is treated in a hydrogen sulfide scrubber by counterflow with an aqueous ammonia wash water. A stream of aqueous weak ammonia liquor is cooled and sprayed through nozzles in the mid-region of the hydrogen sulfide scrubber. A quantity of aqueous ammonia liquor, corresponding to the quantity which is sprayed through the said nozzles, is withdrawn from the hydrogen sulfide scrubber at a level below the nozzles and is introduced into the top of the said hydrogen sulfide scrubber. Ammonia vapor released at the nozzles has a higher partial pressure than the ammonia partial pressure of the coke oven gas in the region of the nozzle. The aqueous ammonia liquor from the deacidifier is the source of the cooled aqueous ammonia liquor which is introduced through the nozzles. A portion of the aqueous ammonia liquor from the deacidifier is introduced directly into the top of the hydrogen sulfide scrubber as a portion of the required aqueous ammonia wash water.

REFERENCES:
patent: 2878099 (1959-03-01), Breuing et al.
patent: 2884304 (1959-04-01), Grosskinsky et al.
patent: 3789105 (1974-01-01), Tippmer et al.
patent: 4009243 (1977-02-01), Weber et al.

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