Preparation method and use of catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural

Abstract

The invention discloses a preparation method of a catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural. The preparation method comprises the following steps: firstly, performing in situ synthesis of a hierarchical pore Y-type molecular sieve carrier by using a one-step hydrothermal crystallization process, and then preparing a molecular sieve loaded type catalyst by using a dipping process. The invention further discloses a method for preparing cyclopentanone through hydrogenation of water phase furfural in the presence of the catalyst. The method disclosed by the invention is simple in steps; and operation conditions are easily controlled. The synthesized hierarchical pore Y-type molecular sieve is relatively high in crystallization degree, contains micropores and mesopores, and also is large in specific surface area. The catalyst prepared by using the molecular sieve has a developed hierarchical pore structure to ensure that a reactant is quickly diffused and transferred; carbon deposition is not easily formed on the surface of the catalyst, and meanwhile, the side effects are reduced. Compared with a catalyst prepared by using a conventional molecular sieve, the catalyst has the advantages of remarkably increasing the reaction rate, increasing the yield of a target product, and being or in catalysis effect, and better in industrial prospect.

Description

technical field [0001] The invention relates to the technical field of molecular sieve-supported catalysts, in particular to a preparation method and application of a catalyst for hydrogenating furfural in aqueous phase to prepare cyclopentanone. Background technique [0002] Cyclopentanone is an important fine chemical intermediate, and it is a raw material for the preparation of new spices such as methyl dihydrojasmonate and brandyne, and the anxiolytic drug buspirone. Because of its good solubility to various resins, it is widely used as a solvent in the electronics industry. There are many synthetic methods of cyclopentanone. The traditional synthesis of cyclopentanone is the cyclization of adipic acid under the action of a catalyst to synthesize cyclopentanone. The method uses acids to react, which has a corrosive effect on equipment, and cyclopentanone is easy to polymerize in the reaction process. In recent years, with C 5 The research on the production of cyclopen...

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Problems solved by technology

However, acid dealumination or alkali desiliconization are post-treatment methods, which have many disadvantages: the process is not easy to control, and it is easy to cause the collapse of the molecular sieve stock price, and the demetallization speed is affected by the sodium content of zeolite, roasting temperature and water vapor partial pressure Impact

In this method, the preparation process of carbon airgel is cumbersome and the preparation cost is high, and the synthesis time is much higher than that of conventional molecular sieves. The carrier is not easy to remove and requires long-term roasting in an oxygen atmosphere.

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