PROCESS FOR REMOVING HYDROGEN SULFIDE FROM GASES

摘要

The invention provides an improvement to a known process for removing hydrogen sulfide out of a gas, which uses a non-aqueous scrubbing liquor (24) that contains dissolved sulfur and an amine base. The hydrogen sulfide reacts with the elemental sulfur and the amine base to form amine polysulfides and a scrubbed gas (10). The known process uses air to oxidize the amine polysulfides into sulfur, water and amine base, and collects the sulfur (20). The improvement is the use of sulfur dioxide as the oxidizing agent.