Method of treating vapors containing ammonia and hydrogen sulfid

Details Method of treating vapors containing ammonia and hydrogen sulfid Method of treating vapors containing ammonia and hydrogen sulfid

1995-12-05

1997-09-30

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423237, 423564, B01D 5358

Patent

active

056723261

ABSTRACT:
Ammonia and 5 to 40 volume percent hydrogen sulfide containing vapors which arise in the vaporization of process water from hydrogenation or a crude oil fraction or in gas treatment in a coking plant, can be subjected in a cracking catalyst reactor to breakdown of the ammonia to nitrogen and hydrogen. The resulting process gas is cooled to 250.degree. to 350.degree. C. and is fed to a hydrogenation reactor where any sulfur is hydrogenated to the hydrogen sulfide. The process gas can then be subjected to further treatment without the danger of sulfur blockage of the process lines. For example, the hydrogen sulfide can be removed by a selective absorption process.

REFERENCES:
patent: 3822337 (1974-07-01), Wunderlich et al.
patent: 4041130 (1977-08-01), Mackles
patent: 4143122 (1979-03-01), Laufhutte et al.
patent: 4181706 (1980-01-01), Choulat et al.
patent: 4273749 (1981-06-01), Kimura et al.
patent: 4302434 (1981-11-01), Hellmer et al.

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