Triglyoxyl reaction, removal of residual phosgene.
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Oxadiazoles are synthesized using phosgene; how can the residual phosgene in the system be completely removed? I carried out the reaction under reflux for a long time, yet there was still a small amount of residual phosgene left in the system. How can it be completely eliminated? If such a small amount of phosgene is present in the workshop, it can be extremely dangerous. I hope experts can suggest some solutions – thank you!
Thank you, can I post the same thread there as well?
The exhaust gas from the phosgene reaction needs to be absorbed by an alkaline solution； If the reaction mixture permits, 1. Wash with alkaline water ； Or 2, eliminate by introducing ammonia gas.
Thank you. Well, it seems that many companies use phosgene trioxide. During the production process, how is the phosgene remaining in the reaction solution dealt with? The exhaust gas can be absorbed using an alkaline solution. When triphosgene is used, there is more or less a small amount of residual phosgene in the reaction mixture.