Preparation, Characterization And Catalytic Properties Of Mesoporous Iron Hydroxyphosphate And Its Supported Noble Metals

Styrene oxide, sulfoxides and a, ?-unsaturated alcohols are widely used in medicine,perfume intermediates, and the synthesis of other organic compounds and polymers intermediates. In recent years, these can not satisfy the market demand. Now, selective oxidation of styrene and sulfoxide, and selective hydrogenation of a, ?-unsaturated alcohols has become a major research focus. There are some problems in the industrial methods, such as heavy pollution, high cost and so on. That is why a high efficient,economical and echo-environmental method is imperative.Mesoporous iron hydroxyphosphates are synthesized by reverse microemulsion-solvothermal methods and used to prepare a metal-based catalyst, this method can effectively control the morphology of particles. This system has good dispersibility and no impurity, and is a promising method for preparation of micro (nano) particles.In this paper, catalytic oxidation of styrene, sulfides, and catalytic hydrogenation of cinnamaldehyde were investigated. Catalysts were prepared by impregnation method,deposition-precipitation method and alcohol reduction method. In the end, optimal catalysts and experimental conditions were determined. The morphology and physicochemical properties of catalysts were characterized by XRD, TEM, SEM, BET,FT-IR and XPS. The main contents and results are summarized as following:(1) Study on the synthesis of styrene oxide and sulfoxide. In the oxidation system:Au/FHP-a (deposition-precipitation method) as catalyst, acetonitrile as solvent and TBHP (H2O2) as oxidizer. The effects of the supports, catalyst preparation methods,amount of catalyst, loading of gold, reaction solvent and reusability on the oxidation reaction were investigated, and the optimum reaction parameters were determined.(2) Study on the synthesis of cinnamyl alcohol. In the catalyst system: Au/FHP-c as catalyst, hydrogen as reducing agent, isopropanol as solvent, cinnamaldehyde as substrate and autoclave as reactor. The effects of the reaction conditions on the hydrogenation reaction were investigated, and the optimum reaction parameters were determined.