Production and market situation of cyclopentene at home and abroad
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Dear Haihao friends: I would like to learn about the production and market situation of cyclopentene both domestically and internationally. Especially with the high price of cyclopentene, why have domestic manufacturers stopped production this year? Thank you to the knowledgeable friends who answered my questions; you can send me a private message. Thanks!
If cyclopentadiene is hydrogenated to produce cyclopentene, the cost would be very high. To separate cyclopentene using separation techniques, many preprocessing facilities would be needed in the initial stage. However, I think it is mainly policy pressures that result in low production rates among chemical companies
Is it just due to environmental pressures?
I’m not exactly sure either; I only know that several facilities used for producing cyclopentene and cyclopentane were repurposed a few years ago
Thank you! It seems I need to find someone who knows the situation and ask them again.
Is the hydrogenation method or the direct separation method via C5 cracking the main approaches used domestically at present?
The pyrolysis product of C5 is cyclopentadiene, not cyclopentene.
I know what you mean – that the content of cyclopentene is low while that of cyclopentadiene is high. But what I’m discussing here is the issue of cyclopentene as a single olefin; in China, there are methods for its direct separation, though the yield is not high. Do you have any knowledge of the industry situation for cyclopentene?
I study the separation of pyrolyzed C5; I’m only familiar with cyclopentadiene, and I’ve really never dealt with cyclopentene
Cyclopentene makes up about 2% of the C5 fraction in pyrolysis gas, so its separation is not very significant
Then I have a question you might know the answer to: cyclopentadiene accounts for about 15 wt% in C5 cracking, while dicyclopentadiene accounts for about 40 wt% in C9 cracking. How can the potential total amount of cyclopentadiene be calculated? If C5 and C9 are simply added together, is there a risk of double counting?