In-situ crystallization high zeolite waste plastic catalytic cracking microsphere catalyst and preparation method and application thereof
By catalyzing the microsphere catalyst of high zeolite waste plastic in situ crystallization, the problem of low yield of low carbon olefins in existing catalysts is solved, especially the yield of propylene, and efficient catalytic cracking is achieved to produce chemicals such as ethylene, propylene and butene, which improves the activity and stability of the catalyst.
CN119702056APending Publication Date: 2025-03-28SHANDONG UNIV OF TECH
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Patent Information
- Application Number
- CN202411599166.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
In the process of producing low-carbon olefins, the yield of low-carbon olefins, especially propylene, needs to be further improved.
Method used
In situ crystallized high zeolite waste plastic catalytic cracking microsphere catalyst is used. This catalyst can efficiently catalytically crack the waste plastic into one-step and produce chemicals such as ethylene, propylene and butene through nano-zolized ZSM-5 zeolite content, good wear resistance and strong hydrothermal stability.
Benefits of technology
Maximize the yield of low-carbon olefins, especially propylene, which significantly improves the yield. At the same time, the liquid products are rich in aromatic hydrocarbons, which improves the reactivity and service life of the catalyst.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses an in-situ crystallization high zeolite waste plastic catalytic cracking microsphere catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. Carrying out spray drying on mixed slurry consisting of clay, an external silicon source, the pre-crystallization liquid and water to obtain microspheres; the preparation method comprises the following steps: preparing microspheres, roasting the microspheres, mixing the roasted microspheres with an alkali-containing aqueous solution and a template agent to obtain a mixture, carrying out hydrothermal crystallization, filtration and separation on the mixture, adding a phosphorus compound and a metal compound into a product obtained after hydrothermal crystallization, uniformly mixing, and carrying out drying and roasting treatment to obtain the in-situ crystallization high-zeolite waste plastic catalytic cracking microsphere catalyst. The in-situ crystallization nanocrystallization ZSM-5 catalyst is high in zeolite content and developed in mesopores, and the molecular sieve and the matrix are tightly combined through similar chemical bonds, so that the activity stability of the catalyst is enhanced; the catalyst is used for catalytic cracking reaction of waste plastics, is high in reaction activity and long in service life, greatly improves the yields of ethylene, propylene and butylene, and is rich in aromatic hydrocarbons in liquid products.
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