A catalyst for the production of ethylene and propylene, its preparation method, and its application.
By preparing a catalyst containing a spinel structure and combining co-precipitation and impregnation methods, the problems of poor catalyst stability and low ethylene and propylene yield were solved, and a petroleum hydrocarbon catalytic cracking process with high stability and high ethylene and propylene yield was realized.
CN117861662BActive Publication Date: 2026-06-30CHINA PETROLEUM & CHEMICAL CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2022-10-09
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
In existing petroleum hydrocarbon catalytic cracking processes to produce ethylene and propylene, there are problems such as poor catalyst stability, high methane yield, and low ethylene and propylene yields.
Method used
A catalyst composed of AxByDzO4 compound with spinel structure, rare earth element oxides, ZSM-5 zeolite and clay is prepared by co-precipitation and impregnation methods. Alkali metal or alkaline earth metal elements are introduced to inhibit deep cracking and improve catalyst stability and ethylene propylene yield.
Benefits of technology
This achieved high catalyst stability and low methane yield, significantly improving the yields of ethylene and propylene and enhancing economic benefits.
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Figure CN117861662B_ABST
Abstract
This invention discloses a catalyst for the production of ethylene and propylene, its preparation method, and its applications. The catalyst comprises the following components: I) 1%–10% of chemical formula A x B y D z A compound of O4; in the chemical formula, the oxidation states of elements A, B, and D are m, n, and p, respectively, satisfying x·m + y·n + z·p = 8, where m, n, and p are integers not greater than 3; the A x B y D z O4 has a spinel structure; II) 0.5%–10% is selected from at least one oxide of rare earth elements, P, Mo, and W; III) 20.0%–55.0% is selected from at least one zeolite of ZSM-5 and ZSM-11; IV) 10%–30% is a binder; V) 25.0%–60.0% is clay. This catalyst is used in the catalytic cracking of petroleum hydrocarbons to produce ethylene and propylene, and features good catalyst stability, low methane yield, and high ethylene and propylene yields.
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