Sn-Beta molecular sieve, method of preparation and application thereof, and method of oxidation reaction of cyclic ketones

The method of dealumination and tin supplementation addresses the limitations of existing Sn-Beta molecular sieves, producing a high Sn content Sn-Beta molecular sieve with enhanced Lewis acid content, achieving superior catalytic performance in cyclic ketone oxidation reactions.

KR1020260113286APending Publication Date: 2026-07-21CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Applications
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-12-25
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing Sn-Beta molecular sieves face challenges such as low tin content, large particle size, and low Lewis acid content, which affect their catalytic performance in reactions like the Baeyer-Villiger oxidation of cyclohexanone.

Method used

A method involving dealumination and tin supplementation of HY molecular sieves to produce Sn-Al-FAU, followed by crystal structure conversion and further dealumination and tin supplementation, results in a Sn-Beta molecular sieve with a high framework Sn content and uniform Sn species distribution, enhancing Lewis acid content.

Benefits of technology

The resulting Sn-Beta molecular sieve exhibits excellent catalytic activity and selectivity in cyclic ketone oxidation reactions, with improved performance and reduced environmental impact due to the absence of fluoride ions.

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Abstract

Sn-Beta molecular sieve, a method for manufacturing the same, and an application thereof, and a method for the oxidation reaction of cyclic ketones, wherein the silicon-tin molar ratio of the molecular sieve is 8 to 15, and the pyridine infrared L-acid content of the molecular sieve at a desorption temperature of 200°C is 600 to 900 μmol / g. The Sn-Beta molecular sieve has a high Sn content and a high L-acid content, and exhibits excellent catalytic performance for the Baeyer-Villiger oxidation reaction of cyclic ketones.
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