FIELD: chemistry.
SUBSTANCE: invention relates to chemical engineering, particularly to obtaining dehydrated ethanol from synthetic alcohol. The method of dehydrating ethanol via extractive rectification with ethylene glycol in one composite column, in which the composite column has a side fastening section consisting of 3 t.t, and the main column has 21 t.t, the reflux ratio in the main column and the side section is equal to (0.33-0.38) and (0.11-0.15), respectively, with extraction of ethanol in the distillate of the main column, and ethylene glycol in the still bottom, which is returned for reflux to the third plate of the main column, and water in the distillate of the side section.
EFFECT: invention enables to obtain ethanol and water of higher quality and reduce power consumption by 20,1% compared to the prototype scheme with the same ratio of the starting mixture to ethylene glycol.
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