Abstract: Extraction of p-aminophenol by D2EHPA, Alamine336 and their mixture were studied under various initial pH ranging 3—10.Both extractants extracted neutral form of p-aminophenol. When the pH value was between pK_a1and pK_a2,a maximum distribution ratio appeared. This pH dependence can be explained by varying the molar fraction of neutral PAP with pH value. The mixed solvent of D2EHPA and Alamine336 had a higher distribution ratio than either Alamine336 or D2EHPA alone, i.e.,the extraction of p-aminophenol with the mixed solvent showed the synergistic effect,and the molar concentration ratio of D2EHPA to Alamine336 at 1∶1.5 was the synergistic point.