Process for sulfur removal suitable for treating high-pressure gas streams

Abstract From the Canadian patent

H2S-containing gases, particularly such gases at elevated pressure are , treated to remove H2S by reaction in a liquid medium with SO2 the SO2 being , present in stoichiometric excess with respect to the H2S. The SO2 is produced by combustion of sulfur, preferably sulfur produced in the reaction between H2S and SO2, preferably with oxygen. The process produces a treated gas that is substantially free of both H2S and SO2. An acid-gas absorber/stripper system or other system typically found in such processes to raise or concentrate the H2S level in the gas to be treated is not needed in , operations according to the invention.