Process for reducing corrosive impurities in sulfolane used for extracting aromatic hydrocarbons

摘要

A process is disclosed for reducing the level of corrosive impurities in sulfolane solution originating from a process for the extraction of aromatic hydrocarbons from petroleum and having a pH of at least 8.5, comprises combining a sulfolane-soluble polyprotic acidic substance with said sulfolane to form a solid phase containing at least a portion of said corrosive impurities, and separating the sulfolane from the solid phase.