Method for preparing TS-1 molecular sieve

Abstract

The TS-1 molecular sieve preparing process features that surfactant is added into the mother liquid for synthesizing the molecular sieve, so that most of the silicon source and titanium source after hydrolysis agglomerate into solid grains. After the solid grains are filtered out and crystallized, the filtrate containing small amount of residual silicon source and titanium source is used as the alkali source for hydrolyzing the newly added silicon source and titanium source for synthesizing the next batch of molecular sieve. The process has greatly reduced environmental pollution, lowered preparation cost and raised synthesizing efficiency and benefit.

Description

technical field

[0001] The invention relates to a preparation method of a titanium-silicon molecular sieve, and more specifically relates to a preparation method of a titanium-silicon molecular sieve (TS-1) with an MFI structure. Background technique

[0002] Titanium-silicon molecular sieve is a new type of heteroatom molecular sieve developed in the early 1980s. 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 selective oxidation performance and high catalytic activity for many organic oxidation reactions, such as epoxidation of olefins, hydroxylation of aromatic hydrocarbons, oximation of cyclohexanone, and oxidation of alcohols. -ox) type molecular sieve catalysts have good application prospects.

[0003] TS-1 molecular sieve is a new type of titanium-silicon molecular sieve with excellent catalytic selective oxidation performance formed by introducing transit...

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