A catalytic cracking catalyst and a method for preparing the same
By modifying kaolin-based transcrystalline molecular sieves and controlling the crystallization process, a multi-level porous catalyst was prepared, which solved the problem of high coke production in in-situ crystallized Y-type molecular sieve catalysts and achieved high heavy oil conversion activity and low coke selectivity.
CN115812006BActive Publication Date: 2026-04-17CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information
- Application Number
- CN202180044957.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-11-25
- Filing Date
- 2021-06-23
- Publication Date
- 2026-04-17
- Estimated Expiration
- 2041-06-23
AI Technical Summary
Technical Problem
Existing in-situ crystallized Y-type molecular sieve catalysts have a high coke yield during heavy oil conversion, which is difficult to reduce effectively.
Method used
Modified molecular sieves based on kaolin crystallization were used as catalyst components. By controlling the silicon-aluminum ratio and sodium content during the crystallization process and combining rare earth modification, a catalyst with a hierarchical porous structure was prepared to reduce coke selectivity.
Benefits of technology
While maintaining a high heavy oil conversion rate, it significantly reduced coke selectivity and improved catalyst activity and resistance to heavy metal contamination.
✦ Generated by Eureka AI based on patent content.
Abstract
The present application belongs to the field of catalyst preparation, and relates to a catalytic cracking catalyst and a preparation method thereof. The catalytic cracking catalyst comprises 10-70 wt% of a cracking active component, 10-60 wt% of a binder and 10-70 wt% of clay, wherein the cracking active component comprises 5-100 wt% of a first Y-type molecular sieve and 0-95 wt% of a second molecular sieve; the first Y-type molecular sieve is a modified kaolin-based metacrystalline molecular sieve, and the sodium oxide content thereof is less than 2 wt%. The preparation method of the catalyst comprises the steps of beating, spray drying, washing, filtering and drying the cracking active component comprising the modified kaolin-based metacrystalline molecular sieve, the binder and the clay. The catalyst is used for heavy oil catalytic cracking reaction, and has good coke selectivity and high heavy oil conversion rate.
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