A high hydrothermal stability ssz-13 molecular sieve, its preparation method and application

By using fluorinated silicon slag as a silicon source, and employing hydrothermal activation and crystallization processes, high hydrothermal stability SSZ-13 molecular sieves were synthesized. This improved the hydrothermal stability of the molecular sieves and the service life of the catalyst, solved the problem of skeleton dealuminization of SSZ-13 molecular sieves under high-temperature steam environment, and achieved effective utilization of resources.

CN122102159APending Publication Date: 2026-05-29CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-11-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The existing SSZ-13 molecular sieve has insufficient hydrothermal stability, especially in high-temperature steam environments where it is prone to skeleton dealuminization and collapse, affecting the service life of the catalyst.

Method used

Using fluorinated silicon slag as the silicon source, a high hydrothermal stability SSZ-13 molecular sieve was synthesized through hydrothermal activation and crystallization processes to increase the proportion of isolated aluminum. The isolated aluminum content was determined by cobalt exchange method. The preparation method is simple and suitable for industrial production.

Benefits of technology

The hydrothermal stability of SSZ-13 molecular sieve was improved, the service life of the catalyst was extended, and the resource utilization of fluorinated silicon slag was realized, reducing environmental pollution.

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Abstract

The application provides a kind of high hydrothermal stability SSZ-13 molecular sieve and its preparation method and application.The molar ratio (SiO2 / Al2O3) of SiO2 and Al2O3 of the SSZ-13 molecular sieve is 25-100, isolated aluminum accounts for ≥90%, isolated aluminum accounts for higher, has better hydrothermal stability than conventional SSZ-13 molecular sieve.The preparation method provided by the application uses fluorine-containing silicon slag as silicon source, synthesizes SSZ-13 molecular sieve by the process route of activation first and then crystallization, can realize the resource utilization of fluorine-containing silicon slag, can also improve the hydrothermal stability of the prepared SSZ-13 molecular sieve, and the process is simple, suitable for industrial production.
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