Continuous process for scrubbing out hydrogen sulfide and ammoni

Details Continuous process for scrubbing out hydrogen sulfide and ammoni Continuous process for scrubbing out hydrogen sulfide and ammoni

1973-10-25

1977-02-22

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

B01D 5334

Patent

active

040092437

ABSTRACT:
A continuous process is provided for scrubbing hydrogen sulfide and ammonia from coke oven gases by selectively scrubbing the hydrogen sulfide using aqueous ammonia, then distilling the hydrogen sulfide again from the wash liquor combining the ammonia directly with acids or certain acid salts, e.g., sulfuric acid or ammonium bisulfate, liberating the combined ammonia therefrom by decomposition, and then recycling the released ammonia to the hydrogen sulfide scrubber, thereby increasing the ratio of ammonia to hydrogen sulfide therein. A preferred absorbent for ammonia is monoammonium phosphate.

REFERENCES:
patent: 2106734 (1938-02-01), Gollmar
patent: 2884304 (1959-04-01), Grosskinsky et al.
patent: 2899277 (1959-08-01), Holowaty
patent: 3097065 (1963-07-01), Gollmar

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