NO emergency terminator
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I would like to ask what is the basis for using NO as an emergency terminator in PVC production, and can NO be used together with α-styrene? Thank you!
Reply to 1# Qiheye: 1. NO is chosen because it provides effective termination effects and does not require regular replacement; it is not used nowadays due to its high toxicity. 2. It has lower toxicity compared to nonylphenol, and requires regular replacement. Most no longer use NO; instead, nonylphenol is used.
NO pauses the reaction, which will resume after some time.
Reply to 3# Resin Pride: Hey, the person above – could you tell me what this means? Pause the reaction and then it will react again after a while? ? ? ? ? ?
We use NO as an emergency terminator and nonylphenol as a polymerization inhibitor
NO is used as an emergency terminator; emergencies generally refer to situations such as sudden power outages or water interruptions. NO, when added to the bubbles as a gaseous terminator, can act as a stirrer. Under normal circumstances, it should not be used as a terminator, and it is also difficult to handle if it enters the recycling system.
Still use α-styrene, and press it in with high-pressure nitrogen； It’s relatively safer; the NO feature was likely introduced along with the technology, but many manufacturers have now made changes, with most retaining the Jinhua Technology features.
In other words, upon the addition of NO, the reaction stops, and the temperature and pressure in the polymerization reactor cease to rise. However, after 1 to 2 hours, it can be seen that the reaction resumed inside the polymerization reactor, and heat removal from the reactor started again.
Indeed, NO serves as an emergency terminator in cases of power and water outages! ! !
After NO is added, the reaction stops. What is the mechanism behind this? If the subsequent reactions continue, how does it start again? How does the quality of the product obtained after the reaction is completed following the addition of NO compare to the quality of the product obtained after a normal reaction is completed? ? There are differences! ?
Not bad! I’ve learned a bit! However, I would appreciate it if professionals could provide further clarification regarding Haiyou’s issue