By way of analyzing the process of recovering naphthalene from dephenollized phenol oil, explore three new technologies of recovering naphthalene, choose reasonable and optimal plan and give, theoretical benefit of using the new technologies.

Through the experimental study of dephenolization with ion precipitation process,the influencing factors on the dephenolizing effects,such as phenol concentration,addition of precipitator,pH value and temperature,were investigated,the optimum conditions for dephenolizing process were obtained.