Polycrystalline cluster ZSM-5 molecular sieve as well as preparation method and application thereof
By using a polycrystalline cluster ZSM-5 molecular sieve, which has a specific pore size distribution, the problem of low efficiency of existing catalysts in the ring-opening decomposition reaction of cycloalkanes is solved, and higher propylene selectivity is achieved.
CN119706866AActive Publication Date: 2025-03-28CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information
- Application Number
- CN202311256550.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-27
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2043-09-27
AI Technical Summary
Technical Problem
The existing catalysts are inefficient in the ring-opening decomposition reaction of cycloalkanes, resulting in low selectivity of propylene.
Method used
A polycrystalline cluster ZSM-5 molecular sieve is used, which has at least two most pore diameters in the range of 1 to 100 nm, preferably in the range of 5 to 50 nm, and a variety of diffusion paths are provided through this structure to improve reaction efficiency.
Benefits of technology
The ring-opening decomposition reaction efficiency and propylene selectivity of macromolecular cycloalkanes during catalytic cracking are significantly improved.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a polycrystalline cluster ZSM-5 molecular sieve as well as a preparation method and application thereof. The polycrystalline cluster ZSM-5 molecular sieve has at least two typical most probable pore diameters in a range of 5 to 50 nm. In the preparation process of the molecular sieve, two alkali sources (M1 and M2) are adopted, and the molar ratio M1 / M2 of the two alkali sources meets the following relational expression: 0.1 < = n (M1) / n (M2) < = 10.0. The polycrystal cluster ZSM-5 molecular sieve has higher propylene selectivity on ring opening cracking of macromolecular cycloalkanes.
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