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
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Patent Information

Application Number
CN202211229918.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-09
Publication Date
2026-06-30
Estimated Expiration
2042-10-09

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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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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Citation Information

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