Regenerative drying method for titanium silicalite molecular sieve catalyst

Abstract

The invention relates to a regenerative drying method for a titanium silicalite molecular sieve catalyst. When the titanium silicalite molecular sieve catalyst is regenerated, titanium silicalite molecular sieve catalyst solution is added into a vacuum rake dryer, and vapor is used as a heating medium for indirectly heating to obtain the dried titanium silicalite molecular sieve catalyst. In the regenerative drying method, the evaporation intensity is high, materials are uniformly dried, oxidization and overheating are avoided, and products with the moisture content lower than 5% can be obtained and can be packaged without crushing operation. As the water vapor is used as the heating medium, the materials are sufficiently mixed and sufficiently exchange heat in a cylinder when stirred, energy consumption is reduced, and the materials are conveniently recycled.

Description

technical field [0001] The invention relates to a method for regenerating and drying a titanium-silicon molecular sieve catalyst. Background technique [0002] Titanium silicate (TS) has been a research hotspot in the field of molecular sieve catalysts in recent years due to its good catalytic performance. A large number of literatures have been reported on the synthesis and application of the molecular sieve. TS-1 with MFI structure, TS-2 with MEL structure, and TS-48 with larger pore structure have been synthesized so far. This type of molecular sieve has excellent catalytic activity and directional oxidation performance for many organic oxidation reactions, such as epoxidation of olefins, hydroxylation of aromatic hydrocarbons, oxidation of cyclohexanone, and oxidation of alcohols. They have good catalytic properties as redox molecular sieve catalysts. application prospects. When the catalyst is regenerated, the titanium-silicon molecular sieve catalyst has to go throu...

AI Technical Summary

Problems solved by technology

When the catalyst is regenerated, the titanium-silicon molecular sieve catalyst has to go through multiple washing and drying processes. Different drying methods result in different degrees of difficulty in the drying process, especially affecting the recovery rate of the catalyst during the drying process, resulting in titanium-silicon Molecular sieve catalyst yield decreases and cost increases