Beta / zsm-5 intergrowth zeolite molecular sieve, hydrocracking catalyst, preparation method and application thereof

By preparing a catalyst combining Beta/ZSM-5 symbiotic zeolite molecular sieve and metal active components, the problem of low yield of light aromatics in existing Beta zeolite molecular sieve-based catalysts was solved, achieving high-yield conversion of light aromatics and benzene, thus meeting the demand for high-value-added chemical products.

CN119660764BActive Publication Date: 2026-05-29CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2023-09-20
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing Beta zeolite molecular sieve-based catalysts have low yields of light aromatics, especially benzene, which makes it difficult to meet the demand for high value-added chemical products.

Method used

Beta/ZSM-5 symbiotic zeolite molecular sieves were prepared by one-step hydrothermal synthesis and combined with metal active components and binders to form a catalyst. The pore structure and acid distribution were optimized to improve the yield of light aromatic hydrocarbons.

Benefits of technology

It improved the yield of light aromatics and benzene in hydrotreated catalytic diesel, achieving efficient conversion into light aromatics and ethylene cracking feedstock, and improved the light aromatics selectivity of conventional Beta zeolite molecular sieve-based catalysts.

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Abstract

The application discloses a Beta / ZSM-5 symbiotic zeolite molecular sieve, a hydrocracking catalyst and a preparation method and application thereof. The Beta / ZSM-5 symbiotic zeolite molecular sieve has the topological structures of BEA and MFI, wherein the particle size of the particle with the topological structure of BEA is 50-500 nm, and the particle size of the particle with the topological structure of MFI is 3-6 mu m; preferably, the molar ratio of the silicon-aluminum oxide molecular substance of the Beta / ZSM-5 symbiotic zeolite molecular sieve is 25-300, preferably 50-200. The hydrocracking catalyst is applied to a catalytic diesel hydrocracking reaction, and the yield of light aromatic hydrocarbons and benzene in the reaction product can be effectively improved.
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Citation Information

Patent Citations

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