The water removal issue in the preparation of dichloropropanol using the glycerol method
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I’m seeking help from experts regarding the water removal issue in the preparation of dichloropropanol using the glycerol method. Those who are familiar with this issue or have used this method, please share your insights! Thank you!
When producing dichloropropanol using the glycerol method, a large amount of process water is generated as a by-product of the reaction; at a reaction temperature of 120°C, this water vaporizes. As a result, the water content in the crude dichloropropanol product is around 5%. The difficulty in removing water lies in the water vaporized along with HCL. There are 2 methods for treating this water: one is to carry out a pre-reaction between the water and glycerin, which consumes HCL ； Second, the water is treated by hydrolysis to extract HCL for use in the glycerol reaction