PROCESS FOR DEHYDRATING AN AQUEOUS ALCOHOL MIXTURE COMPRISING AT LEAST METHANOL AND ETHANOL

摘要

P Process for dehydrating an aqueous mixture of alcohols containing methanol and ethanol and optionally higher alcohols. / P P The mixture of alcohols is fractionated C1. At least part of the ethanol with the higher alcohols is drawn off at the bottom 2 and extracted C2 with a hydrocarbon 8. The water is discharged 7. The extract 12 is fractionated C3 and C4. Dehydrated methanol and dehydrated ethanol 21 are collected which can be mixed. The heat necessary for heating the column C3 results from the condensation of the top vapors of the column C1 in the exchanger R. / P P Application to the manufacture of a fuel mixture for automobiles. / P