Problems with isoprene polymerization?
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High-purity isoprene polymerizes very easily and is highly sensitive to temperature. Gelation occurs very easily during the distillation process; the reboiler, the filter at the inlet of the kettle liquid pump, and the pipelines often get clogged. Although we added some polymerization inhibitors, the clogging remains severe. I would be very grateful if that person could offer some good suggestions! Communicate more. This post was last edited by www.z.a.h on 2007-6-20 at 13:02.]
Hehe! I am also working on isoprene rubber polymerization! I hope experts can offer more suggestions!
Our company has also established a R&D team for liquid isoprene rubber. After reviewing some materials, we found that it is quite difficult to make progress in this area; we hope that those with experience in this field can offer us their guidance.
I prepare isoprene using chemical methods
I don’t have the same problem as the original poster during the distillation process; the reboiler in my isoprene product tower has hardly been cleaned in a year. Could it be that there’s an issue with the operating temperature or the antipollution agents used?
Could you roughly explain the methods for producing isoprene through chemical processes?
There must be an issue with the operating temperature or the inhibitor added.
1. Dual reboilers are used in the design； 2. The temperature at the bottom of the tower should be maintained at around 60°C ； 3. Increase the amount of the polymerization inhibitor!
This post was last edited by wangym on 2011-4-18 at 23:29. The experts above all have quite extensive experience; I recently encountered a design scenario involving isoprene with 100 ppm of water content, as well as about 0.5% self-polymer. I intend to use dehydration towers and distillation columns to refine the isoprene so that its water content is below 20 ppm and its purity is at least 99.5%； I would like to ask: 1. Are all self-polymerizing polymers polyisoprene, or are there others such as dicyclopentadiene? 2. During separation, water, self-polymer, and TBC are first removed from the bottom of the previous dehydration tower; then is the product from the top of that tower fed into a dewaxing tower to remove other components that are heavier than isoprene? I’ve never seen isoprene separation done before; the separation temperature isn’t very high, right? Is vacuum reduction also required for this process? ； 3. If TBC is separated off in the dehydration tower, wouldn’t the refined isoprene be more prone to self-polymerization? How is this problem usually addressed? Can the refined isoprene be directly used in the subsequent reaction to produce the product? Could everyone please analyze this and suggest the best separation process? Thank you