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 them in fusel column to take off fusel oil from accumulator section. Essence of invention consists in that ethyl alcohol is additionally purified via taking away fusel-ether- aldehyde-methanol fractions from condenser of carbon dioxide separator, condenser and alcohol trap of brew or brew-epuration column; epuration of brew distillate successively in methanol column to take off methanol-ether-aldehyde fraction from its condenser and epuration column to take off steam from steam space over feed plate to heat methanol column, which receives hot water onto its upper plate. From condenser of this column, fusel-ether-aldehyde-methanol fraction is withdrawn, which, together with fractions from condenser of carbon dioxide separator, condenser and alcohol trap of brew or brew-epuration column are used to additionally feed brew column, from whose condenser methanol-ether-aldehyde fraction is taken off, and from 28-36th plate zone propyl alcohols' fraction is withdrawn. This fraction together with those from condensers of methanol and alcohol columns are fed into fractionation column whose digestion zone middle part receives hot water. From liquid phase of plate located over hot water inlet of fractionation column, propyl alcohols' concentrate is withdrawn, and from still of column, water-ethanol liquid, which is directed into initial brew. EFFECT: improved process flowsheet. 1 dwg, 1 tbl