Nitración ácida (HNO3–H2SO4) del triclorobenceno como pretratamiento para su gestión

Abstract

In this investigation the nitration of trichlorobenzene was evaluated using “mixed acid”, with the purpose of observing the effects of four different combinations in the reaction yield. The combinations used were: HNO3[67%]/H2SO4[97%], HNO3[67%]/H2SO4[97%]+SO3[20%], HNO3[90%]/H2SO4[97%], HNO3[90%]/H2SO4[97%]+SO3[20%], the experiments were made in room temperature and using times of reactions of one, two and three hours for each mixture. From the results obtained in GC-MS it was observed that HNO3[90%]/H2SO4[97%] and HNO3[90%]/H2SO4[97%]+SO3[20%] both at one hour of reaction, achieved the mononitration of all the reagent, having the second one the main advantage that the handling of the H2SO4[97%] is less risky than the H2SO4[97%]+SO3[20%]. On the other hand, the nitration with HNO3[90%]/H2SO4[97%]+SO3[20%] at three hours of reaction generates a greater production of dinitrated trichlorobenzene.