In the alkylation reaction, how to deal with the low octane number of the alkylated oil
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In sulfate alkylation, what determines the octane number? What impact does the concentration of sulfuric acid have on the reaction? How to deal with the small amount of isobutylene present in the n-butane coming from the top of the n-butane distillation column? I hope some expert can help solve this; I would be extremely grateful!!
Is there any expert online? ? ? Solve this:':'(:'(:'(:'(:'(:'(:'(:'(:'(:'(
The octane number of alkylated oils is primarily controlled by the following factors: 1. An alkene-to-alkane ratio of over 8 generally yields better results. 2. Control the reaction temperature at 8-12 degrees. 3. Ensure the acid concentration is not lower than 90%. 4. The acid-to-hydrocarbon ratio should be kept above 1.1:1. The presence of isobutylene in the overhead vapor of the n-butane removal tower is mainly due to poor control of the reaction process, resulting in incomplete reactions. It is necessary to control the appropriate processing load.
Regarding the reaction mechanism, @Chen Wentao’s article provides a detailed explanation. For the last issue, when isobutylene is present, there is one problem: the reaction does not proceed to completion, either due to an insufficient alkene-to-olefin ratio or an insufficient acid-to-hydrocarbon ratio