Method and extraction of sulfur compounds IMPROVED device of a cutting hydrocarbonnee by liquid-liquid extraction with a sodium hydroxide solution

A method of extraction of sulfur compounds from a hydrocarbon fraction (gasoline, LPG ...) by liquid-liquid extraction with a sodium hydroxide solution using a pre-processing unit of the feed to be treated consisting of N imitation marble placed pretreatment capacity parallel, each operating capacity discontinuously respecting a law of programming the renewal of the sodium hydroxide solution.