How is the 10% cut point of the octane range for the octane product produced by the DuPont process in its isooctane unit controlled and adjusted?

For the isooctane plant products produced by the DuPont process, if the 10% distillation cut point remains above 75, this may be related to various factors such as the raw materials, reaction temperature, and catalyst activity. The following measures can be tried for adjustment: 1. Raw material quality: Improve the processing of raw materials to reduce the content of impurities such as sulfur and nitrogen, or choose raw materials of better quality. 2. Reaction temperature: Reducing the reaction temperature appropriately can lower the boiling range. 3. Steam blending ratio: Increasing the steam blending ratio can widen the boiling range and lower the boiling point. 4. Catalyst: Select a catalyst with better activity to improve the isomerization efficiency. 5. Increase the reflux ratio: Increasing the reflux ratio at the top of the distillation column can reduce the boiling range by 10%. 6. Feed load: Reducing the feed load also helps to lower the boiling range. Each device may have different process and operating parameters, and the specific details need to be determined through relevant tests and optimized operations. The optimal operating parameters can only be determined by making fine adjustments based on the actual operation of the equipment, in conjunction with the analysis and test results. .

Is the C5 content high at the top of the n-butane stripping tower? It is possible to try reducing the temperature at the bottom of the tower in order to increase the content of C4 compounds in the octane product. The purity and density of octane may decrease slightly, but the initial boiling point and the first fraction collected should decrease to some extent

It can be reduced, but 10% control isn’t possible