Preparation of 1,3-dichloro-2-propanol by the glycerol method
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Dear experts, the company currently has a setup for producing 1,3-dichloro-2-propanol using the glycerol method. The mass fraction of 1,3-dichloro-2-propanol in the product is 95%, while the mass fraction of its isomer, 2,3-dichloro-1-propanol, is 4%; there is also 1% made up of other impurities. How can 1,3-dichloro-2-propanol be separated from 2,3-dichloro-1-propanol? I earnestly ask the experts for their guidance.
1. From an engineering perspective, it is more economical to use an upper distillation column. 2. Extraction is used, but it’s difficult to choose an appropriate extractant.
Does anyone know the industrial process for producing 1,3-dichloro-2-propanol?
{:3_49:} With such a high boiling point and only a small temperature difference, vacuum distillation isn’t very effective; direct distillation will lead to coking. You might try keeping the pressure within a certain range. Here, we simply use direct distillation for epichlorohydrin production. . .