Preparation and Studies on Catalytic Properties of Transition Metal Catalysts
|Course||Physical and chemical|
|Keywords||Cu-Ce/ZSM-5 TPR Catalytic Oxidation Schiff base Oxygen carrier Phase transfer catalyst Cumene|
With the catalyst for the rapid development of the production process , the heterogeneous catalysis homogeneous and homogeneous catalysis heterogenized trend is increasingly evident . This paper attempts to construct a green catalytic system combines the advantages of both , in order to achieve the synergy of homogeneous and heterogeneous catalysts , learn from each other , environmentally friendly purpose . Preparation the series Cu-Ce/ZSM-5 catalyst , TPR, XRD , and IR . The effects of the cerium content , different zeolites , different cerium source catalyst reduction performance . Synthesis of a series of transition metal Schiff base 1:1 and 2:1 complexes , their structures were characterized by molar conductance , magnetic susceptibility , DTA , SEM, UV , IR and other conclusive evidence . The results show that the preparation method is different from the structure of the complexes are very large; water involved ligand complexes ; complexes have an intramolecular hydrogen bond is formed , these are affecting the biological activity of the complexes . Studied in a homogeneous system , the synthesis of Schiff base Co (Ⅱ) complexes simulate oxygen carriers investigated the catalytic cumene oxidation reaction of this catalytic system under mild conditions with air as the oxygen source . To give the best working conditions of the catalyst through the reaction temperature, catalyst concentration , stirring rate , and add to the influence of additives , reaction time, different catalysts , and other factors of the oxidation reaction . In water / organic two-phase catalyst system , the introduction of a phase transfer catalyst TBAB cumene oxidation reaction with water-soluble Schiff base Co (Ⅱ) complexes as catalysts . The effects of this catalytic system with air as the source of oxygen under mild conditions catalytic cumene oxidation reaction . The results show that , ω (CHP) of up to 26% , in line with the requirements of industrial production . And this catalytic system combines the advantages of homogeneous catalysis and heterogeneous catalysis , mild reaction conditions , fast reaction , the catalyst is easily separated from the product , easy recovery , etc. , and thus has a value of industrial applications .