To provide a method for oxidatively desulfurizing a liquid containing an organic sulfur compound, suitable as a post treating process of a hydrogenating desulfurization column.
This method for oxidatively desulfurizing a liquid containing an organic sulfur compound comprises adding an oxidizing agent into the liquid containing the organic sulfur compound and oxidizing the mixture by using a catalyst for oxidizing the organic sulfur compound to a sulfoxide compound and/or a sulfone compound, and then separating for removing the produced sulfoxide and sulfone compounds. As the oxidizing agent, at least one kind of the oxidizing agent selected from the group consisting of an organic peroxide, an organic hypochloric acid compound and an organic hypobromic acid compound, is added in an amount of more than necessary stoichiometric amount for oxidizing sulfur atoms in the organic sulfur compound, and the oxidation reaction is performed by using at least one kind of a solid catalyst at a temperature of a room temperature to a decomposition temperature of the added oxidizing agent or lower. The produced sulfoxide and sulfone are separated by means of an adsorption, a filtration or the like.
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