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Solid acid catalyst in organic synthesis and catalytic application of

Author: GuShanShan
Tutor: GaoGenZhi
School: Qufu Normal University
Course: Organic Chemistry
Keywords: Catalyst SO42-/MxOy solid superacid Pyridine 5 - Methypyridyl Methylpyridine Pyrrolidine N-phenyl- pyrrolidine Toluenesulfonic acid - cellulose composite functional materials
CLC: O643.36
Type: Master's thesis
Year: 2010
Downloads: 298
Quote: 2
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Abstract


Acid-catalyzed reactions are catalyzed an important part of the field, especially in recent years the rise of the solid acid catalyst, it demonstrated excellent characteristics and environmental friendly behavior aroused great interest. Wherein the solid superacid its high acid strength, high catalytic efficiency, no pollution, easy separation, does not corrode equipment and can be reused and recycled, etc., increasingly concerned by the majority of scientists have broad industrial applications prospects. However, due to the presence of solid superacid heterogeneous catalysis, catalytic temperature is high, selective defects and poor, people began to explore organic - inorganic composite materials, and organic - polymer composites in catalysis applications, it can achieve the organic acids homogeneous catalytic effect, but also to achieve effective separation of products. This paper SO42-/MxOy solid superacid catalysts in organic synthesis were studied; and organic - Polymer catalytic materials were explored. The first part of the literature review, introduces solid acid catalyst and organic - inorganic composite materials, organic - polymer composites research. In the solid acid catalysts review, describes the classification of solid acid catalyst and application overview, focusing on the solid superacid catalyst preparation, characterization and application in organic synthesis status quo. Organic - inorganic compound and organic - polymer composites review, describes the classification of composite materials as well as two common preparation method: grafting method and condensation. Highlights sulfonic acid functionalized materials and cellulose polymer materials research and application. The second part of this article is to discuss some experiments and results with the research room prepared SO42-/MxOy solid superacid catalyst synthesis of pyridine, picoline, pyrrolidine and N-phenyl-pyrrolidine reaction, as well as exploratory studied tosylate - cellulose composite functional materials preparation and characterization methods, and the results are discussed. SO42-/MxOy solid superacid fixed bed catalytic synthesis of methyl pyridine compounds of the study, effects of reaction temperature, feed rate and the ratio of raw materials for the product composition and yield were studied to optimize the reaction conditions, so that the product total yield of 60.16%. SO42-/MxOy solid superacid fixed bed catalytic synthesis of pyridine and 3 - methylpyridine study, effects of reaction temperature, feed rate and the ratio of raw materials for the product composition and yield were studied to optimize the reaction conditions, the product of the total yield of 62.4%. SO42-/MxOy solid superacid fixed bed catalytic synthesis of pyrrolidine study, effects of reaction temperature, feed rate and the ratio of raw materials for the product yield were studied to optimize the reaction conditions, the overall yield of the product reached 79.5 %. SO42-/MxOy solid superacid fixed bed catalytic synthesis of N-phenyl-pyrrolidine study, effects of reaction temperature, feed rate and the ratio of raw materials for the product yield were studied to optimize the reaction conditions, the product of the total yield of 86.3%. Combined organic - Preparation of polymer material, design route Synthesis of p-toluenesulfonic acid - cellulose composite functional material, and the new material of the BET, IR, TEM were characterized, that the feasibility of the synthetic route, and will be applied to the catalytic dehydration reaction of cyclohexanol to test their catalytic properties, in this experiment acid - functional cellulose composite materials exhibit a certain catalytic activity, but the catalyst efficiency is not satisfactory. The reason, I believe that is because of the small amount of p-toluenesulfonic acid caused by the load, so the acid - cellulose composite functional materials synthesis conditions to be optimized.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic > Catalyst
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