Catalyst for producing propylene, ethane through catalytic cracking olefin

Abstract

A catalyst for preparing propene or ethene from olefin by catalytic cracking with high high-temp hydrothermal stability and no coking is proportionally prepared from the ZSM-5 molecular sieve whose mole ratio of SiO2 to Al2O3 is 20-800, RE oxide, and phosphorus oxide as modifier.

Description

technical field

[0001] The invention relates to a catalyst for producing propylene and ethylene by catalytic cracking of olefins, in particular to a catalyst for producing propylene and ethylene by catalytic cracking of olefins with carbon four or more. Background technique

[0002] The demand for basic chemical raw materials such as propylene and ethylene continues to grow, while crude oil raw materials are deteriorating day by day, which has brought about increasingly prominent contradictions in the production of propylene and ethylene. On the other hand, mixed carbon four and above olefins and alkanes are by-products of ethylene plants, refinery FCC units, methanol to olefins, and gasoline units, and usually can only be used as low value-added products such as liquefied gas fuels. It is of great significance to use these olefins and alkanes raw materials for further deep processing to produce high value-added products propylene and ethylene,...