The catalysis of O/W microemulsions of cetyltrimethylammonium bromide(CTAB),butyl alcohol, benzene and water to the hydrolysis of 2,4-dinitrochlorobenzene(DNCB) was stud-ied. Hydrolysis of DNCB in microemulsions under mormal normal temperature and normal pressure wasrealized. The results showed that the rate constants of hydrolysis of DNCB decreased with theincrease of benzene content and the ratio of cosurfactant to CTAB. As cosurfactant, t-butylalcoholis better than n-butyl alcohol for the reaction.
