Alkylation ratio
Thread Content
What impact does a lower alkene-to-alkane ratio in the feed for our alkylation reaction have on acid consumption? Thank you all.
My understanding is that the impact is minimal; acid consumption is mainly caused by the magazine, and it depends on the degree of refinement of the raw materials. Moreover, the amount of recycled isobutane can be adjusted to control the alkene-to-olefin ratio, without increasing acid consumption further
How low? If it’s slightly low, there’s no impact ； If it is too low, the liquid level in the deisobutane reflux tank will be affected; if adjustments are not made in a timely manner, the product quality will experience fluctuations
When the alkene-to-olefin ratio is low, the reaction temperature increases accordingly, which indirectly leads to an increase in side reactions and thus an increased acid consumption in the equipment
The main impact should be on the octane rating
8----15:1 A lower alkene-to-olefin ratio of 7.5 (when maintained at this level for an extended period) accelerates the auto-polymerization of olefins in the reactor, leading to side reactions and a higher dry point of the oil; on the other hand, a too-high alkene-to-olefin ratio increases the load on tower 4.
Factors affecting acid consumption: water, methanol, dimethyl ether, ethylene, butadiene, and n-butane, which do not participate in the reaction, all result in high acid consumption