A kind of titanium-containing silicon molecular sieve catalyst and its preparation method and application

Abstract

The invention belongs to the field of titanium silicon molecular sieve, and more specifically provides a preparation method of a titanium silicon-containing molecular sieve catalyst. The preparation method comprises following steps: 1, a discharge agent is contacted with an organic compound so as to obtain a contact product, wherein the organic compound is one or a mixture of a plurality of ingredients selected from sulphone, ketone, and acidamide, and the discharge agent is a discharge agent of a reaction device taking titanium molecular sieve as a catalyst active component; 2, in the presence of a water-containing solvent, the contact product and an alkali source are mixed and are subjected to hydro-thermal reaction. The catalyst is obtained via the preparation method. The invention alsoprovides applications of the titanium silicon-containing molecular sieve catalyst in oxidation reaction. The relative crystallinity and the micropore specific area of the titanium silicon molecular sieve in the discharge agent are recovered, and the organic compound can be recycled via simple separation, so that environment pollution caused by the preparation process is reduced. High temperatureis not needed in recycling, energy consumption is reduced effectively, and the titanium silicon-containing molecular sieve catalyst is especially suitable for industrial applications.

Description

Technical field [0001] The invention relates to a titanium-containing silicon molecular sieve catalyst, and a preparation method and application thereof. Background technique [0002] Titanium silicate molecular sieve is a new type of heteroatom molecular sieve developed in the early 1980s. So far, there have been synthesized TS-1 with MFI structure, TS-2 with MEL structure, and TS-48 with larger pore structure. This type of molecular sieve has excellent selective oxidation performance and high catalytic activity for many organic oxidation reactions, such as olefin epoxidation, aromatic hydroxylation, cyclohexanone oximation, alcohol oxidation and other reactions. They are used as redox molecular sieves. The catalyst has good application prospects. [0003] Among them, TS-1 molecular sieve is a new type of titanium silicate molecular sieve with excellent catalytic and selective oxidation performance formed by introducing transition metal element titanium into the molecular sieve ...

AI Technical Summary

Problems solved by technology

However, usually after a period of operation, the catalytic performance of titanium-silicon molecular sieves will deteriorate and deactivation will occur.

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