How to remove propionitrile?
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Our newly synthesized chemicals contain propionitrile. I wonder if the expert has a way to remove it. The physical and chemical properties of propionitrile are: http://www.chemyq.com/xz/xz11/106174idxbq.htm http://www.hudong.com/wiki/%E4%B8%99%E8%85%88
First of all, I want to tell this friend that when asking this question, it is best to explain the situation in more detail.: That is, what the product is, what properties it has, and the approximate content of acetonitrile in it, so that you can get the most suitable crime. Let me briefly talk about possible removal methods: 1. Make full use of the fact that acetonitrile can be dissolved in water. If the product is insoluble in water, the product can be washed with water to remove a small amount of acetonitrile. ； 2. Use extraction to remove acetonitrile. If the product is also soluble in water but insoluble or slightly soluble in ethanol, ether, dimethylformamide, etc., you can use the property of acetonitrile to be miscible with ethanol, ether, dimethylformamide, etc. to extract the acetonitrile in the product. ； 3. The product is separated from acetonitrile by distillation, which is based on the difference in boiling points between the product and acetonitrile. ； 4. The chemical properties of acetonitrile are used to separate it from the finished product. For example, acetonitrile will undergo hydrolysis reactions under acidic and alkaline conditions. Of course, chemical separation methods require understanding of the chemical properties of the product.
Sorry! I am talking about how to remove propionitrile. The percentage of propionitrile in acetonitrile is 0.02%. The boiling point of propionitrile is 97.2℃ and the boiling point of acetonitrile is 81.4℃:handshake