n-butane isomerization
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A n-butane isomerization unit is installed after the alkylation unit; what is the economic feasibility of this?
There are not many positive-alane isomerization units available in China that are used in conjunction with alkylation processes. Xinxin in Beihai, Guangxi, and Jinyuhai in Ningxia are equipped with such isomerization units; it is said that these units were designed by Shanghai Xinyou Energy Technology Co., Ltd.
There isn’t much n-butane left in the alkylation unit, so it’s unnecessary if it is only used to support the alkylation unit.
May I ask how many tons of n-butane can be remaining each year from a 200,000-ton alkylation unit (the raw material for this alkylation unit is C4 after etherification)?
A rough estimate would be 4,000 tons per year; you can calculate it using the composition information of the butane derivatives after etherification. Typical n-butane isomerization plants are built with a capacity of over 300,000 tons.
From our 200,000 tons of alkylation process, we obtain 30,000 tons of n-butane; we are planning to purchase some more and then set up a facility for the isomerization of 50,000 tons of n-butane (without any recycling). The raw material used is also the carbon-4 derivative of ether. Why is the output of n-butane so much lower than what you would expect?
Yes, it’s a difference of 10 times. What’s going on here? It’s possible that the butane content in our raw materials varies. I have also doubted the role of nordane in the reaction, but I have never found a theoretical basis for it. Such as this post http://bbs.hcbbs.com/thread-1764689-1-1.html
The 50,000-ton butane isomerization project is not large-scale; it’s unclear whether its approval will be granted
100,000 tons can be applied for at the time of project approval
100,000 tons can be applied for at the time of project approval
Could you please provide the operation data codes for the two n-butane isomers on Xinyou?