Method and system for producing low-carbon olefin
By adopting rapid separation and countercurrent contact technology in the catalytic cracking process, the problems of mutual influence of catalysts and low conversion efficiency in the existing processes are solved, and low carbon olefins are efficiently produced, reducing energy consumption and impurity yield.
Patent Information
- Application Number
- CN202311282453.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-28
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2043-09-28
AI Technical Summary
In the existing CPP and DCC-Plus processes, there are problems such as the two catalysts interacting with each other, low conversion efficiency, long process and high energy consumption.
Secondary cracking is avoided by performing a catalytic cracking reaction in the first riser and rapidly separating the reaction oil and gas from the catalyst to be produced using the first separator. At the same time, in the light hydrocarbon reaction bed of the second riser, the light hydrocarbons are subjected to catalytic conversion reaction with the second catalyst by using countercurrent contact technology to improve the yield of the olefin.
This improves the yield of olefins, reduces impurity yield, simplifies the process, reduces energy consumption, and avoids the negative impact of coking catalysts on the conversion reaction.