Process to remove hydrogen-sulfide from gas by reflux recycle from sour water stripper
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United States of America Patent
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Nov 23, 2010
Grant Date -
Jun 11, 2009
app pub date -
Dec 10, 2008
filing date -
Dec 10, 2007
priority date (Note) -
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Abstract
A process for reducing hydrogen sulfide from a gas comprising contacting the gas with an aqueous scrubbing liquid recycled from a sour water stripper. The aqueous scrubbing liquid comprises ammonia. The contacting of the gas with the aqueous scrubbing liquid thereby produces a semi-sweet gas with reduced concentration of hydrogen sulfide and a rich liquid solution.
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