how to separate ethanol and butanol
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Ethanol and t-butanol cannot be separated from each other by distillation because of the proximity of their boiling points. Ethanol can be readily separated from t-butanol by using extractive distillation in which the extractive agent is a higher boiling oxygenated organic compound or a mixture of two or more of these. Typical examples of effective agents are: methyl benzoate; benzyl benzoate and benzoic acid; methyl salicylate, hexahydrophthalic anhydride and salicylic acid.
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