Treatment of aqueous aminophenol with kerosene-Span 80-NaOH emulsion liquid membrane

The treatment of aqueous o-,m-,p-aminophenol with kerosene-Span80-NaOH aqueous emulsion liquid membrane was studied systematically.The removal rate of aminophenol was more than 75% at following conditions: the volume ratio of petroleum to Span80 are 95% and 5%,respectively,the mass concentration of inner water phase NaOH is 2.5%,the volume ratio of oil to inner phase is 1∶1,the volume ratio of emulsion to water is 1∶5,the emulsion-solution mixing speed is 200 r /min,and the extraction time is 20 min.