Process to remove hydrogen-sulfide from gas by reflux recycle from sour water stripper

摘要

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.