Abstract: The liquid membrane extraction method is studied for treating the phenolic wastewa-ter produced in refinery. Some factors influencing the extraction efficiency are studied ex-perimentally, including the emulsifying agent concentration, sodium hydroxide concentra-tion, the ratio of oil volume to water volume, the ratio of emulsion fluid, PH value of wastewater, mixed strength and extraction time. The treatment of phenolic wastewater by
liquid membrane extraction methid can decrease the amount of phenol significantly and so it has bright applied prospect.

Key words: Extraction, Phenolic wastewater, Pollution control, Wastewater utilliza-tion