Hierarchical-pore titanium silicon molecular sieve catalyst synthesized with assistance of aerosol and preparation method of hierarchical-pore titanium silicon molecular sieve catalyst

Abstract

The invention discloses a hierarchical-pore titanium silicon molecular sieve catalyst synthesized with the assistance of an aerosol and a preparation method of titanium silicon molecular sieve catalyst, and the titanium silicon molecular sieve catalyst is applied to the catalytic oxidation reaction of cyclohexene. The silicon molecular sieve catalyst is a hierarchical-pore titanium silicon molecular sieve synthesized through an aerosol method, is spherical, contains TS-1 nanometer crystals with MFI micropore structures, and is covered with a porous titanium silicon material. The catalyst can adopt hydrogen peroxide as an oxidant to perform catalytic oxidation on the cyclohexene to synthesize cyclohexene oxide, cyclohexanediol, cyclohexenone and cyclohexanol. The titanium silicon molecular sieve catalyst has the advantages that the preparation process is simple and continuous, the synthesis period is short, the atom utilization ratio is high, the titanium distribution is uniform, and the reaction can be magnified according to a certain ratio. The titanium silicon molecular sieve catalyst provided by the invention has the characteristics of mild reaction conditions, high activity and selectivity, small using amount, and easy recycling.

Description

technical field [0001] The invention belongs to the technical field of aerosol-assisted synthesis and application of molecular sieve materials, and relates to a method for aerosol-assisted synthesis of a titanium-silicon multi-stage molecular sieve catalyst and its application in catalytic oxidation of cyclohexene. Background technique [0002] TS-1 microporous molecular sieve showed good catalytic activity in olefin epoxidation, but its micropore size limited its application in macromolecular reactions. A lot of work at home and abroad is devoted to the synthesis of multi-level pore composite titanium-silicon molecular sieve materials, and it is hoped that such materials can show good catalytic performance in the oxidation of macromolecular olefins. The research on hierarchical molecular sieve materials at home and abroad is mainly focused on the traditional hydrothermal synthesis method. There are few reports on aerosol-assisted synthesis of hierarchical porous molecular s...

AI Technical Summary

Problems solved by technology

However, the aerosol-assisted synthesis of titanium-silicon hierarchical porous molecular sieves containing TS-1 nanocrystals has not been reported so far.

Images