Solid Acid Catalysts In Organic Synthesis, Catalytic Application Of Research

Acid catalysis is an important part of catalysis fields, especially the solid superacid,which are developed in resent years, and aroused great interest because of its excellent characteristics and friendly behavior to environmental. Solid superacid has many advantages as high acidic strength, high catalysis efficiency, no pollution to environment, easily dissociated, no corrosion to equipments, reusable and renewable, which attract close attention of many researchers, and has capacious insductrial prospect. But owing to its many defects as inhomogeneous catalysis, high catalytic efficiency, low selectivity, the application of organo-inorganic composite material and organo-polymer composite material in catalysis fields was explored, which can reach homogeneous catalysis effect, and easily dissociated. In this paper application of SO42-/MxOy solid superacid catalysts in organic synthesis was studied.The first part of this paper was literature review, which introduced the research progress of SO42-/MxOy solid superacid catalyst, organo-inorganic composite material and organo-polymer composite materials. The classification and application profile of solid acid catalyst was introduced in the overview about solid acid catalyst, especially the preparation methods, characterization methods and applications in organic synthesis reaction of solid superacid catalyst. In the overview about organo-inorganic composite material and organo-polymer composite material, the classification and two preparation methods as inoculation method and condensation method of composite material was introduced, especially the research and applications of sulfonic acid functionalized polymer materials and cellulose materials.The second part of this paper was experiment and discussion of the results. Pyridine, 3-methyl-pyridine, alkylpyridine compounds, pyrrolidine, and N-phenyl-pyrrolidine was synthesized by SO42-/MxOy solid superacid catalyst which prepared by the research room, and the preparation methods and characterization methods of p-toluenesulfonic acid-cellulose composite functional material was exploratory studied, as well as the results are discussed.In the research of SO42-/MxOy solid superacid catalytic synthesized alkylpyridine compounds in fixed bed, the reaction temperature, the speed of charge-in and the proportion of raw materials had influenced over the products and their yield, and their yield achieved the highest, which was 60.16% by optimizing condition of reaction.In the research of SO42-/MxOy solid superacid catalytic synthesized pyridine and 3-methyl-pyridine in fixed bed, the reaction temperature, the speed of charge-in and the proportion of raw materials had influenced over the products and their yield, and their yield achieved the highest, which was 62.4% by optimizing condition of reaction.In the research of SO42-/MxOy solid superacid catalytic synthesized pyrrolidine in fixed bed, the reaction temperature, the speed of charge-in and the proportion of raw materials had influenced over the yield, and its yield achieved the highest, which was 79.5% by optimizing condition of reaction.In the research of SO42-/MxOy solid superacid catalytic synthesized N-phenyl-pyrrolidine in fixed bed, the reaction temperature, the speed of charge-in and the proportion of raw materials had influenced over the yield, and its yield achieved the highest, which was 86.3% by optimizing condition of reaction.The synthesized of p-toluenesulfonic acid-cellulose composite functional material which combined with preparation methods of organo-polymer composite material, and its characterizations as BET, IR and TEM proved that this synthesis method was feasible. And this p-toluenesulfonic acid-cellulose composite functional material has a little catalytic activity, but catalysis effect was not perfect by catalyzing dehydration reaction of cyclohexanol. I believed that the reason was due to a small amount of p-toluenesulfonic acid loading. Therefore, the synthesis conditions of p-toluenesulfonic acid-cellulose composite functional material need to be optimized.