Study On The Catalytic Direct Amination Of Toluene To Toluidine

The direct functionalization of toluene, which involves the activation of C-H bond, preserves a challenging topic in chemistry and attracts much attention recently. Toluidines are important chemical in industry, and are commonly prepared by multi-step process. In present work, tow ways are designed for the direct animation of toluene with hydrogen peroxide and ammonia or hydroxylamine hydrochloride. It is found that toluidines could be obtained over the catalysts designed and prepared in present work. By adjusting the composition and preparation methods of the catalysts, enhanced selectivity to toluidines could be obtained.The activities for the amination of toluene to toluidines with ammonia were investigated over nickel-based catalysts supported. The catalytic performance, the reduction behariour of catalysts depend mainly on the dispersion and fine chemical state of surface species. Zirconium species in the catalysts are beneficial to the selectivity and yield of toluene.The activities for the amination of toluene to toluidines in different reaction media over vanadium-based catalyst supported on different carrier were also investigated. The effects of reaction temperature, reaction time, with or without air on the yield of toluidines were studied. We found the best carrier and the best reactive condition. We separated the last product and analyzed it to improve that it is our objective product. Moreover, The activity for a series of V-base catalyst was investigated and the best catalyst was studied by means of XRD. We found this isa multiphase reaction. The catalysts could be separated and reused. The catalyst shows high activities for the amination of touldies reaction.