Separation of n-propanol from allyl alcohol by extractive distillation

摘要

N-propanol and allyl alcohol cannot be separated from each other by distillation because of the proximity of their boiling points. N-propanol can be readily separated from allyl alcohol by using extractive distillation in which the extractive agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of two or more of these compound. Examples of effective agents are: dimethylsulfoxide; acetamide and ethylene glycol phenylether; adiponitrile; N,N-dimethylacetamide; dimethylformamide; and sulfolane.