Sulfolane + auxiliary solvent extraction distillation technology has been adopted in the revamping . Compared with the traditional liquid liquid extraction the technology is characterized by short process flow low energy consumption and less investment .

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An extractive distillation process using a composite solvent sulfolane and co-solvent COS for recovering pure benzene from reformate was developed . The process was applied in a 150kt / a unit at Dalian Petrochemical Company .

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It is hopeful that this work will arouse the attention of the people working in sulfolane extraction process so as to take measures to curb this problem .

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Chemical cleaning for the aromatic plants sulfolane extraction process unit

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