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I would think (although I don't know for sure) that you could remove water pretty effectively from glycerol by distillation just because their boiling points are quite different (water is 100 °C and glycerol is 290 °C). However, to get it absolutely free of water, you may find that a drying agent or molecular sieves are more effective (but those would only be used after the glycerol is mostly anhydrous already).

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17y ago
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6mo ago

No, glycerol cannot be dehydrated by distillation as it forms an azeotrope with water at certain compositions. Other methods, such as treatment with desiccants or molecular sieves, are usually employed to remove water from glycerol.

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Q: Can you dehydrate glycerol by distillation?
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Glycerol is formed through the hydrolysis of fats and oils, releasing glycerol and fatty acids. This process typically involves treating fats with water or an alkaline solution to break down the ester bonds between the glycerol and fatty acids. Glycerol is then separated from the fatty acids through a process called distillation or extraction.


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