On the processes and equipment materials for epichlorohydrin
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Dear seniors, I would like to ask whether the main method for producing epichlorohydrin in China at present is the high-temperature chlorination of propylene, as this process causes significant corrosion to the equipment. What materials are generally used for reactors? I would appreciate it if experienced engineers could help me understand this.
This post was last edited by Wang Genrong on 2015-6-5 at 16:20. The main method for producing epichlorohydrin in China is the glycerol method; epichlorohydrin produced by this method has high purity, low costs, and requires minimal investment in equipment. The main equipment for this process includes: graphite chlorination tower, graphite heat exchanger, graphite dehydration tower, graphite distillation tower, etc.
Moderator, thank you very much for your reply. I have also looked into the relevant literature; if the main method used in China at present is the glycerin method, can the glycerin raw material meet the needs of large-scale production? Could you list a few companies that produce using the glycerin method? The large companies in China that produce epichlorohydrin are, I think, no secret.
The epichlorohydrin produced by the glycerol method indeed has good quality, and can reach premium grade in bulk. Do you want to know the details? I can introduce you to relevant experts; I am good friends with them. As for the supply of glycerin, you needn’t worry; it is mainly imported, offering not only good quality but also low prices, with guaranteed delivery times.
I learned from the Internet that Shandong Haili is the largest producer of epichlorohydrin in Asia. Do you know anything about them? They probably don’t use the glycerol method for production. It’s probably not appropriate to disclose the contact information of relevant experts in public; could you send me a private message instead?
You can send me a text message to provide information such as the company name, contact number, and contact person. Sending an email works too. My phone number and email are both in the profile picture.
Do you know the cost of the glycerin method? What is the total production capacity of the glycerin industry? What is the operating rate of domestic manufacturers of pure glycerin? I work in the high-temperature chlorination method, and I don’t see any advantages to the glycerin method at all!
Currently, there are two main methods in use, but the propylene method still accounts for the majority of applications. The glycerin method is also well-developed, with very stable performance metrics, as it has been in use on an industrial scale for almost 10 years now. Want to learn more about the traditional French processes for acrylic production, as well as those introduced from abroad ； All processes using the glycerol method have been implemented throughout the entire scope, from pilot scale to pilot plant scale and finally to industrial production // Please contact us/
Is the propylene method the same as the propylene oxidation method? Is it the same process as that used to produce epichlorohydrin from hydrogen peroxide?
Propylene method: Propylene-chloropropylene-【cyclization: lime milk】-ECH; Hydrogen peroxide method: Propylene-chloropropylene-【cyclization: hydrogen peroxide d】-ECH