Help: Ethanol purification
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How to purify 97% ethanol to 99%? Thank you, how to perform simulations using proii?
Create a distillation tower, enter your known conditions, and the ethanol concentration you want to obtain can be simulated – give it a try
Azeotropic distillation is required. There is a document on Baidu Wenku that you can use for reference. http://wenku.baidu.com/view/1a3fd928915f804d2b16c1fb.html
Ethanol and water form an azeotrope; at a concentration of around 95%, an azeotrope with a boiling point lower than that of ethanol and water is formed, and it is impossible to further purify it using conventional distillation. There are generally two methods for special distillation: azeotropic distillation and extractive distillation. The classic azeotropic distillation process involves adding benzene to obtain pure ethanol from the bottom of the tower ； Extractive distillation involves the addition of ethylene glycol or glycerol. I have previously done simulations for these two options; I’ll look for them again and share them once I find them.
Ethanol and water form an azeotrope; at a concentration of around 95%, an azeotrope with a boiling point lower than that of ethanol and water is formed, and it is impossible to further purify it using conventional distillation. There are generally two methods for special distillation: azeotropic distillation and extractive distillation. The classic azeotropic distillation process involves adding benzene to obtain pure ethanol from the bottom of the tower ； Extractive distillation involves the addition of ethylene glycol or glycerol. I’ve done simulations for these two options before; I’ll go back and check what the friend upstairs said, as it seems better. . To obtain high-purity ethanol, chemical methods are used, with the addition of calcium oxide to achieve 99.5% purity
1. Dehydrate directly using molecular sieves； 2. Use ethylene glycol for extraction distillation ； 3. Azeotropic distillation is carried out by adding an azeotrope such as benzene, toluene, cyclohexane, etc.
It would be great to have safety precautions and control points for various process parameters