The alkylation feedstock has a high content of isobutylene
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What is the impact of using tetra-carbon compounds prior to etherification (with 15% isobutylene content) in direct alkylation on acid consumption and the dry point of the alkylated oil?
Traditional processes result in high acid consumption and high operational costs
The effect of isobutylene alkylation is roughly the same as that of n-butylene, with only a slightly lower octane number. It should not cause a high dry point.
Some mixed butane or pure isobutane needs to be added.
It can be used; it’s suitable for the low-temperature sulfuric acid process employed by your Lubei Chemicals. However, the reaction temperature needs to be low – the DuPont version requires a too high reaction temperature and is not suitable for this material, unless the reaction temperature is strictly controlled. The acid consumption has little impact. As for the issue of the dry point, it refers to the temperature at which the oil evaporates completely; therefore, as long as there is alkylated diesel with these large molecular chains present, it’s fine. His efficiency is high, so a regular distillation tower is sufficient for cutting at atmospheric pressure
Your response to this question is incorrect; problems arise whenever the isobutylene content exceeds 5 percent. This applies even to the Lumas process. When I was helping solve problems for Jilin Songyuan Petrochemical around the New Year in 2017, they faced exactly this issue. If one really wants to use this ingredient, it is only possible to do so at a high alkene-to-olefin ratio and at low temperatures; only in this way can the occurrence of side reactions be minimized as much as possible
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The yield will be higher; isobutylene alkylation tends to produce components with more than 8 carbon atoms
The dry point of 15% isobutylene can rise to around 230; the impact of acid consumption is relatively small