Metal composite molecular sieve catalyst and preparation method and application thereof

By preparing a metal composite molecular sieve catalyst and utilizing a mixture of micron-sized ZSM-5 and nano-sized molecular sieves, the problems of catalyst stability and low yield of light aromatics were solved, thus achieving efficient aromatics production.

CN122076497APending Publication Date: 2026-05-26CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-11-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing catalysts suffer from poor stability and low yield of BTX-type light aromatics during methanol-to-aromatics conversion.

Method used

A metal composite molecular sieve catalyst is prepared by mixing micron-sized ZSM-5 molecular sieves and nano-sized molecular sieves loaded with metal, through solid-phase physical grinding or liquid-phase dispersion, to form a catalyst with synergistic catalytic ability for the methanol-to-light aromatics reaction.

Benefits of technology

It improves catalyst stability and light aromatic yield, extends catalyst lifespan, enhances aromatization efficiency, and reduces the generation of coke species and catalyst pore blockage and deactivation.

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Abstract

The invention discloses a metal composite molecular sieve catalyst and a preparation method and application thereof. The metal composite molecular sieve catalyst provided by the invention comprises the following components in percentage by mass: a) 50-95% of a metal-loaded micron ZSM-5 molecular sieve; b) 5-50% of a nano molecular sieve; wherein the metal is selected from at least one of zinc, gallium, silver, copper, nickel or molybdenum. The catalyst provided by the invention is used in a methanol-to-light aromatic hydrocarbon reaction, and has the advantages of high catalytic activity, high light aromatic hydrocarbon yield, good stability and the like.
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Citation Information

Patent Citations

  • Small-crystal-grain ZSM-5 methanol aromatization catalyst

    CN104549441A

  • Zinc-modified hierarchical pore ZSM-5 nano-zeolite and preparation method thereof

    CN109607563A

  • Process for improving aromatization reaction performance of methanol

    CN114262251A