Method for removing hydrogen sulfide from coke oven gas

Details Method for removing hydrogen sulfide from coke oven gas Method for removing hydrogen sulfide from coke oven gas

1981-04-13

1982-08-03

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423220, 423236, 423238, B01D 5334

Patent

active

043427316

ABSTRACT:
An improved sulfur-ammonia process for removing hydrogen sulfide from coke oven gases. In the improved process, a concentrator formerly used for standby operation is used at all normal times as an ammonia scrubber to improve the efficiency of gas separation during normal operation and is used as a concentrator for its intended standby functions during the alternative operations. In its normal function, the concentrator/scrubber functions as a scrubber to strip ammonia gas from recirculating liquid streams and to permit introduction of an ammonia-rich gas into a hydrogen sulfide scrubber to increase the separation efficiency of that unit. In the standby operation, the same concentrator/scrubber serves as a concentrator to concentrate hydrogen sulfide in a "strong liquor" stream for separate recovery as a "strong liquor."

REFERENCES:
patent: 3789105 (1974-01-01), Tippmer et al.
patent: 3819816 (1974-06-01), Wunderlich et al.
patent: 4009243 (1977-02-01), Weber et al.

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