METHOD OF PRODUCING RECTIFIED ETHYL ALCOHOL Russian patent published in 1997 - IPC

FIELD: ethyl alcohol production. SUBSTANCE: invention relates to a method of producing rectified ethyl alcohol by way of digesting alcohol from brew in brew or brew-epuration column accompanied with transferring alcohol with associated impurities into brew distillate together with vapors from the column and liquid fractions from condenser of carbon dioxide separator and alcohol trap; purifying brew distillate from top and intermediate impurities, including fusel oil components, in epuration column using hydroselection; rectifying epurate in alcohol column to remove fusel oil fractions, fusel alcohol, and non-pasteurized alcohol; rectifying fusel oil fractions and fusel alcohol from alcohol column in fusel column to take off fusel oil from accumulator section. Essence of invention consists in that ethyl alcohol is additionally purified in a special column, which is supplied and heated with vapors from brew or to take away from its condenser methanol-ether-aldehyde fraction and from alcohol trap, condenser of carbon dioxide separator, and condenser of epuration column, which receives hot water onto its upper plate. The latter fractions are additionally fed into fusel column, and methanol-ether-aldehyde fraction is taken off from its condenser, while propyl alcohols' fraction is withdrawn from 28-36th plate zone. This fraction together with those from condensers of special and alcohol columns are fed into fractionation column whose digestion zone middle part receives hot water. From condenser of this column, top fraction concentrate is withdrawn, from liquid phase of plate located over hot water inlet, propyl alcohols' concentrate, and from still of column, water-ethanol liquid, which is directed into initial brew. EFFECT: improved process flowsheet. 1 dwg, 1 tbl