Synthesis, Characterization And Catalytic Behavior Of Novel Heteroatomic And Amphiphilic β Zeolite

β zeolite is a high-silica zeolite with large-pore three-dimensional structure, it was in the petrochemical and fine chemical as the acommonly used catalyst support or catalyst because of its acid resistance and anti-coking, showing the catalyst efficiency and good selectivity. Many studies showed that the introduction of price have changed characteristics with transition metal ions in the β zeolite framework, you can make it exhibits more excellent physical and chemical properties and unique catalytic properties. Although many researchers do a lot of research showing such good prospects for industrial applications of zeolite with a single hetero atom P zeolite synthesis and applications, but the actual investment in industrial applications is still limited, because mainly of zeolite catalysts catalytic activity to be further improved, the production cost to be reduced, pH regulation zeolite itself to meet the specific needs and adjust zeolite catalysis hydrophilic or lipophilic catalyst itself theory and technology needs to be further explored. Therefore, we chose the synthesis of new amphiphilic β zeolite and characterization and catalytic properties of studying, laying the foundation for the preparation of new industrial catalysts. The main three areas of work we have to do.Firstly, synthesis, characterization and catalytic behavior of Ti-Co-β zeolite and Ti-Cu-P zeolite; Secondly preparation, characterization and catalytic behavior of Amphiphilic β zeolite; Thirdly, the catalytic behavior of Ti-Co-P zeolite in oxidation of styrene using H2O2as the oxidant has also been investigated, and determined the catalytic activity of amphiphilic CTAB-Ti-Co-β zeolite cyclohexene hydration.(1) Synthesis, characterization and catalytic behavior of Ti-Co-β zeoliteTi-Co-p zeolite was hydrothermally synthesized by silica as silica source, tetraethyl ammonium hydroxide as template, ammonium fluoride as mineralizer, cobalt chloride and ammonium metavanadate as heteroatoms Ti and Co source.The structure and chemical composition of the products were determined by X-ray diffraction, infrared spectroscopy, UV-Vis diffuse reflection spectroscopy, thermogravimetry-differential thermal analysis, and scanning electron microscopy. The factors affecting the synthesis of Ti-Co-P zeolite were investigated. The results indicate that the well-crystallized Ti-Co-β zeolite can be synthesized from the precursor with the SiO2:CoO:TiO2:(TEA)2O:H2O:NH4F molar ratio of60:(0.5～3.0):(0.5～3.0):(16～18):(500～650):(30～40) and the Ti and Co atoms present in the framework of the zeolite. The as-synthesized Ti-Co-β zeolite shows excellent catalytic activity in the oxidation of styrene using H2O2as the oxidant. The styrene conversion was71.3%, the selectivity for benzaldehyde was93.4%.(2) Preparation, characterization and catalytic behavior of amphiphilic β zeoliteAmphiphilic zeolites(CTAB-Ti-Co-β) were prepared by using CTAB to modified parent P zeolite. The samples were characterized and the results indicate that the structure of amphiphilic zeolites were not destroyed, the changes of crystal surface is very small. CTAB-Ti-Co-β showed a better catalytic activity than their parent zeolite in cyclohexene hydration. This study can provide new ideas and techniques for the directed synthesis of more active site of the zeolite catalyst to meet the needs of particular reaction.Amphiphilic zeolite can improve the reaction efficiency of multi-phase reaction, has important scientific significance and practical value.(3) Synthesis and characterization of Ti-Cu-P zeoliteTi-Cu-P zeolite was hydrothermally synthesized in a SiO2-TiO2-CuO-(TEA)2O-H2O-NH4F system.The structure and chemical composition of the zeolite samples were characterized. The factors that affected the synthesis of Ti-Cu-β zeolite were investigated. The results indicate that the well-crystallized Ti-Cu-(3zeolite can be synthesized from the precursor with SiO2:TiO2:CuO:(TEA)2O:H2O:NH4F molar ratio of SiO2:TiO2:CuO:(TEA)2O:H2O:NH4F=60:(0.5-3.0):(0.25～3.0):(16～18):(550～650):(25～35) and the Ti and Cu atoms entered the framework of the zeolite.