Process for removing hydrogen sulfide and ammonia from gaseous streams
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United States of America Patent
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Mar 11, 1980
Issued Date -
N/A
app pub date -
Mar 13, 1978
filing date -
Sep 3, 1976
priority date (Note) -
Expired
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Abstract
A process is described for the simultaneous removal of H.sub.2 S and ammonia from gaseous streams containing other acid and basic gases. The process comprises closed loop scrubbing of the gaseous stream with a copper sulfate-ammonium sulfate solution to yield a copper sulfide precipitate, concurrent neutralization of the acidity generated in the scrubbing step by addition or scrubbing of ammonia and other basic gases, separating the precipitate, hydrothermally leaching the precipitate with oxygen or air under controlled temperature and pressure to reoxidize the sulfide to copper sulfate, recycling the copper sulfate to the scrubber, and rejecting sulfur from the system in the form of (NH.sub.4).sub.2 SO.sub.4.
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