Preparation technology of titanium silicon molecular sieve catalyst

Abstract

The preparation process of Ti-Si molecular sieve catalyst includes the following steps: reacting titanium source in alcohol solution and silicon source template agent solution for 3-15 hr and adding water in 3-8 times the silicon source into the reaction product to obtain colloid solution; reacting the colloid solution through heating in non-steady state program control condition to crystallize; filtering, washing, drying and roasting to obtain white solid catalyst powder. The non-steady state program control condition increases the size of the molecular sieve, and this reduces the filtering resistance greatly, eliminates the loss of catalyst, lowers the production cost and reduces the crushing of catalyst during use.

Description

technical field [0001] The invention relates to a preparation method of a titanium-silicon molecular sieve catalyst. Background technique [0002] Titanium-silicon molecular sieve catalysts play a very important role in the selective oxidation of organic compounds, such as the epoxidation of propylene with hydrogen peroxide under the action of titanium-silicon molecular sieve catalysts to prepare propylene oxide, such as cyclohexanone under the action of titanium-silicon molecular sieve catalysts Use hydrogen peroxide to carry out ammoxidation to prepare cyclohexanone oxime, such as phenol under the action of titanium silicon molecular sieve, prepare catechol and hydroquinone with hydrogen peroxide oxidation, the most typical titanium silicon molecular sieve catalyst is document 1( Taramasso M, et al.Preparation of porous crystalline synthetic material comprised of silicon and titanium oxides [P]. US: 4410501, 1983) and literature 2 (Reddy J.S., et al. Titanium Silicalite-2:...

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Problems solved by technology

[0006] Patent 4,701,428 reported that n-ethyl silicate was used as a binding agent, and the particle size of the catalyst was increased by spray dryi...

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