Method of treating vapors containing ammonia and hydrogen sulfide
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United States of America Patent
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Sep 30, 1997
Grant Date -
N/A
app pub date -
Dec 5, 1995
filing date -
Jan 16, 1995
priority date (Note) -
Expired
status (Latency Note)
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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.
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