Research On Preparation Of Nano-Ni Catalysts In W/O Microemulsions And Application In Hydrogenation Of Nitrobenzene

Nano-nickel was widely used as a new, high activity and high selectivity hydrogenation catalyst in chemical industry. In this article, nano-nickel particles were prepared in W/O microemulsion. The catalytic activities of Nano-Ni and Raney-Ni were compared in the reaction of nitrobenzene hydrogenation.The phase behaviors and structural parameters of microemulsion systems were studied in detail. By comparison, surfactant SDS was superior to TritonX 100 and CTAB in stable area of microemulsion system and the influence of temperature. By studying the structural parameters of SDS / C₅H₁₁OH / Xylene / H₂O microemulsion system such as n, â–³G_c→i^oand R_w, the relationships between the three parameters and water content were discussed.Nano-Ni was prepared in the microemulsion system of SDS / C₅H₁₁OH / Xylene / H₂O in which the mass ratio of SDS and C₅H₁₁OH was 2:4 . The optimal process parameters were selected. The Nano-Ni particles were purified by washing and calcining, and their average...