A fluorine-free hydrothermal preparation method for Sn-Beta zeolite

Sn-Beta zeolite was prepared by a fluorine-free hydrothermal synthesis method, which solved the problems of equipment corrosion and environmental pollution caused by the use of fluoride ions. It achieved the synthesis of Sn-Beta zeolite with high Sn content and high catalytic activity, and is suitable for biomass conversion reactions.

CN118164497BActive Publication Date: 2026-07-17ZHENGZHOU UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Filing Date
2022-12-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The use of fluoride ions in existing Sn-Beta zeolite synthesis methods leads to equipment corrosion, environmental pollution, and poor catalytic performance. Furthermore, fluoride-free synthesis processes are cumbersome or have many defects, making it difficult to achieve efficient industrialization.

Method used

Sn-Beta zeolite was prepared by a hydrothermal synthesis method under fluorine-free conditions, through a mixture of silicon source, tin source, organic template agent and alkali metal source, and through aging, gel formation and crystallization processes, avoiding the use of fluoride ions.

Benefits of technology

This method enables the synthesis of Sn-Beta zeolite with high Sn content, short crystallization time, and environmental friendliness, while improving catalytic activity and avoiding equipment corrosion and environmental pollution.

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Patent Text Reader

Abstract

This application discloses a fluorine-free hydrothermal preparation method for Sn-Beta zeolite, belonging to the field of chemical synthesis technology and its applications. The method for preparing Sn-Beta zeolite includes the following steps: S1, mixing materials containing a silicon source, a tin source, an organic template agent R, and water to obtain an initial mixture I; S2, aging the initial mixture I to obtain a mixture II; S3, mixing materials containing the mixture II, an alkali metal source, and an organic additive to obtain a gel III; S4, placing the gel III in a sealed container and crystallizing to obtain Sn-Beta zeolite; the silicon source is pure silicon Beta zeolite. This method for preparing Sn-Beta zeolite can be carried out under fluorine-free conditions, is environmentally friendly, and has high safety; it can synthesize Sn-Beta products with a Sn content of up to 4 wt%.
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