Acetonitrile dehydration
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The acetonitrile feed solution contains 4% water and 96% acetonitrile, with the required concentration of the final product to be over 99.9%. Simply put, is it to distill away all the azeotropes, and what remains is the acetonitrile product? Distill up to 25% of the total liquid according to an azeotropic composition of 84:16?
A distillation column for light fraction removal can be used; acetonitrile with a high water content is obtained at the top, while the water content at the bottom of the column is low. Molecular sieve membranes can also be used.
This post was last edited by flymxcao on 2021-6-15 at 13:57. If yield is not a concern, this method can be used; in case it’s applied successfully, the yield will still be around 75%, and moreover, consideration must be given to what to do with the 85% acetonitrile solution. It is recommended to separate the two towers for a yield of over 99%