Preparation And Studies On Catalytic Properties Of Transition Metal Catalysts

With the rapid progress of catalysts preparation technology, the trends of the homogenization of heterogenous catalysis and the heterogenization of homogeneous catalysis have been obvious more and more. The writer tried to find a kind of green catalysis system ,which possesses the advantages both of them, to meet the demands of commercial application.A serious of catalysts Cu-Ce/ZSM-5 have been prepared and characterized by TPR, XRD and IR. The results show that the cerium content, the cerium source and the radio of silica to aluminum oxide of zeolite have influenced the reduction properties of catalysts.A serious of transition-metal complexes of Schiff base have been synthesized. The structures were characterized by DTA, SEM, UV, IR, molar conductances and magnetic moments. The results demonstrate that synthesis methods effect much on the structure of complexes; water is coordinated to metal; there the intramolecular hydrogen bond is formed, which have importance to the bioactivity. The catalytic properties of Schiff base cobalt(II) complexes in the oxidation of cumene in homogenous system have been studied and obtained the best reaction conditions.The phase transfer catalyst TBAB has been used in the water/organic biphase system. The oxidation of cumene catalyzed by the catalyst system with air as oxidant at amibient pressure and relatively lower temperature has been studied. The results show that (CHP) is 26%, which meets the demand of industrial application. The new system is characterized by wilder reaction, faster reactionspeed and the easy process of the separation of catalysts and feasibility of their reuse, which takes on the potential application in industry.