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Continuous process for scrubbing out hydrogen sulfide and ammonia from coke oven gas. [9 claims]

Patent ·
OSTI ID:7295195
; ;
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. 9 claims, 2 figures.
Assignee:
Firma Carl Still
Patent Number(s):
US 4009243
OSTI ID:
7295195
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
AMMONIA
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GAS
DESULFURIZATION
DISPERSIONS
DISTILLATION
FLUIDS
GASES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PURIFICATION
REMOVAL
SCRUBBING
SEPARATION PROCESSES
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS