Abstract: Liquified hydrocarbon gases containing at least carbonyl sulfide as an impurity are purified by intimately mixing the liquified hydrocarbon gas with an aqueous absorbent for hydrogen sulfide in a hydrolysis zone maintained at a temperature and a pressure sufficient to maintain the liquified hydrocarbon gas in the liquid state and hydrolyze the carbonyl sulfide to hydrogen sulfide and carbon dioxide. The liquified hydrocarbon gas containing at least a portion of the formed carbonyl sulfide and carbon dioxide is separated from the liquid absorbent and passed to an absorption zone where it is contacted with a liquid hydrogen sulfide absorbent where at least the formed hydrogen sulfide is separated from the liquified petroleum gas. A stage of absorption of at least hydrogen sulfide may proceed mixing of the liquified hydrocarbon gas with the absorbent in the hydrolysis reaction zone.

Abstract: A process for reducing the sulfur content of coke oven gas containing hydrogen sulfide, organo-sulfur compounds, and at least one inorganic carbon-sulfur compound, comprises treating the gas stream to remove most of the hydrogen sulfide and then catalytically hydrogenating and/or hydrolyzing the organo-sulfur and carbon-sulfur compounds at an elevated temperature and a partial hydrogen pressure of at least 10 psia, followed by extraction of the remaining and formed hydrogen sulfide.