ZSM-5, ZSM-35, Silicalite-1 or MCM-41 molecular sieve, preparation method thereof, catalyst and isobutane normal construction method
By grafting metals in situ into the inner layer of layered silicate materials within molecular sieves, the problem of metal loss was solved, enabling efficient use and extended lifespan of the catalyst, thereby improving catalytic performance and energy utilization efficiency.
CN121202145APending Publication Date: 2025-12-26CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information
- Application Number
- CN202410841414.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-12-26
AI Technical Summary
Technical Problem
In existing technologies, metals are easily lost in molecular sieve catalysts, leading to a decline in catalytic performance, slow mass and heat transfer rates, and high energy consumption.
Method used
Molecular sieves are prepared using layered silicate materials, and metals are grafted in situ into the interior of the layered materials. Taking advantage of the rapid diffusion and mass and heat transfer characteristics of the layered structure, the catalyst is recycled by adding alkaline solution online until it is deactivated.
Benefits of technology
It extends the catalyst's lifespan, maintains its catalytic performance, and improves reaction efficiency and energy utilization efficiency.
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Smart Images
Figure CN121202145A_ABST
Abstract
The invention relates to a ZSM-5, ZSM-35, Silicalite-1 or MCM-41 molecular sieve, a preparation method thereof, a catalyst and an isobutane normalizing method, and belongs to the technical field of catalyst preparation. The preparation method of the molecular sieve comprises the following steps: mixing raw materials containing a silicon source, water, an organic template agent, a metal M complex and an alkali solution to obtain a mixture; carrying out hydrothermal crystallization on the mixture, and carrying out solid-liquid separation on a crystallized product to obtain a solid phase; and roasting the solid phase to obtain the molecular sieve. The silicon source is selected from a layered silicate material. The material can solve the problem that metal is extremely easy to lose in the reaction process, meanwhile, due to the fact that the material is a layered material which is extremely high in diffusion, mass transfer and heat transfer speed, if the metal in the inner layer is lost in the reaction process, the catalytic performance of the catalyst can be reduced, and it is found through online chromatographic analysis that the catalytic performance of the catalyst is lost.
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