How does catalytic cracking increase propylene yield?
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Is propylene a high-value-added product? How can propylene production be increased by optimizing the operating conditions of catalytic cracking reactions, absorption and stabilization units, as well as gas fractionation units?
Add propylene additive to the reaction regenerator
The catalytic cracking process has given rise to some new processes, including those that produce more olefins. During the catalytic cracking process, due to the action of acidic catalysts, the yield of propylene in the gaseous products is significantly higher than that of other olefins, which is determined by the mechanism of catalytic cracking. The original poster can consult the Beijing Research Institute of Petrochemical Technology regarding the characteristics of the following processes: DCC, MGG, MIO, ARGG, MGD, etc. These new processes are all technologies for producing large amounts of low-carbon olefins.
Without changing the existing process, adding propylene additives remains the most economical option!
http://bbs.hcbbs.com/thread-838459-1-1.html, refer to the paper
How to make adjustments? How to increase it? For example, by adjusting the reaction temperature and the vapor pressure of gasoline, etc
Adding additives is the fastest method, and it does not affect other operations. If it is not added, then the oil-to-agent ratio can only be increased to enhance the reaction depth; however, the levels of dry gas and coke will also rise. It depends on the overall production plan for gasoline and diesel.
As was said upstairs, that’s exactly right; using acrylic additives is the simplest approach. It’s very cost-effective.
Changing the catalyst is key. We used a Ya Bao catalyst for a while, and the yield of liquid hydrocarbons was 20% with an acrylene yield of 8%. After using domestic catalysts, the LPG yield was 16% and the acrylene yield was 5-6%. Well, what a difference!
1. Carbon 4 reprocessing； 2. Re-refining of light gasoline (obtained from the flashing of stabilized gasoline); 3. Addition of a multi-functional revenue-increasing agent (for increased propylene production)
How is C4 reprocessed? Where does it enter?