Mesoporous ZSM-5 molecular sieve with short pore depth and application thereof in preparation of pyridine base

Abstract

The invention discloses a mesoporous ZSM-5 molecular sieve with short pore depth. The molecular sieve is prepared by the following steps: S1, preparing a buffer solution; S2, preparing a NaZSM-5 molecular sieve; S3, preparing a mesoporous HZSM-5 molecular sieve with a short pore depth; and S4, preparing the mesoporous ZSM-5 molecular sieve with a short pore depth. The invention also discloses an application of the mesoporous ZSM-5 molecular sieve with a short pore depth. The application comprises the following steps: S1, activating a catalyst; and S2, preparing pyridine base. According to the method for preparing the pyridine base by catalyzing the alcohol-ammonia reaction through the mesoporous ZSM-5 molecular sieve with a short hole depth prepared by treating the nano ZSM-5 molecular sieve with the buffer solution, the metal-supported mesoporous ZSM-5 molecular sieve catalyst with a short hole depth can be obtained, and the conversion rate of the alcohol-ammonia reaction and the yield of the pyridine base product are improved.

Description

Technical field: [0001] The invention relates to a molecular sieve and its application, in particular to a short-pore-deep mesoporous ZSM-5 molecular sieve and its application in catalyzing the reaction of alcohol and ammonia to prepare pyridine base. Background technique: [0002] Pyridine base mainly includes pyridine and picoline. It is the main raw material for the preparation of pharmaceutical intermediates, pesticide intermediates and fine chemicals, and is also an important intermediate for the synthesis of pyridine-like spices and new pesticides. The supply is in short supply. [0003] At present, pyridine base is mainly produced by aldehyde-ammonia synthesis method, but there are disadvantages such as acetaldehyde is not easy to transport, dependence on petroleum raw materials, etc. In particular, there are problems such as short reaction catalyst life, serious product polymerization and high equipment investment. The preparation of pyridine base by the alcohol ammo...

AI Technical Summary

Problems solved by technology

However, in the research of Qin Hongwen and Liu Juanjuan, due to the deep mesopores of the catalyst, it is easy to deposit carbon and lead to short life, so the yield is not high

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