Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1974-02-11
1976-04-13
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423236, 423238, C01B 1716, C01C 300
Patent
active
039504921
ABSTRACT:
Coke oven gases are washed with an aqueous metallic salt solution of sulfuric acid or sulfurous acid to absorb ammonia, hydrogen sulfide and hydrogen cyanide. The washing solution is then oxidized to recover elementary sulfur. A portion of the oxidized washing fluid is returned for continued washing of gas and a portion of the washing fluid is diverted to a separater where solid compounds which include metal hydroxide and metal cyanide compounds are removed leaving ammonium sulfate solution. The ammonium sulfate solution is heated with combustion air and in a heating agent to produce combustion products including nitrogen, hydrogen and an acid anhydride. The solid compounds from separater are conducted as a aqueous suspension to a reaction vessel wherein, at elevated temperature and pressure, hydrolysis products are formed including free ammonia, metal hydroxide and formate salts. The metal hydroxide is reacted with the acid anhydride in a condensation tower to form reaction products including an aqueous solution of the metal salt which is then conducted together with the formate salt products for further washing of the gas. The ammonia product from the hydrolysis process is returned for washing by the aqueous metallic salt solution and subsequent removal by combustion process.
REFERENCES:
patent: 1609872 (1926-12-01), Garner et al.
patent: 3021189 (1962-02-01), Mancke et al.
patent: 3833714 (1974-09-01), Renault et al.
Jacobson, Encyclopedia of Chemical Reactions, Reinhold Publishing Corp., 1951, Vol. IV, p. 69.
Dr. C. Otto & Comp. G.m.b.H.
Langel Wayne A.
Thomas Earl C.
LandOfFree
Process for removal of ammonia, hydrogen sulfide and hydrogen cy does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for removal of ammonia, hydrogen sulfide and hydrogen cy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for removal of ammonia, hydrogen sulfide and hydrogen cy will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-752821