METHOD FOR PRODUCTION OF RECTIFIED ALCOHOL Russian patent published in 2011 - IPC C12P7/06 

FIELD: food industry.

SUBSTANCE: method involves epuration of brew in the epurating zone of the brew-epuration column (BEC), digestion of alcohol from the brew in its digestion zone of this column, split of the water-and-alcohol vapour flow in the hollow insert between the epurating and the digestion zones in two parts, the first part used for the epurating zone heating while thermal energy of the other is used for brew reheating. Brew distillate is cleared of methanol, acetic aldehyde and other head impurities by way of bleeding fractions from the BEC condenser, the carbon dioxide separator condenser and the impure cuts alcohol trap which, together with fractions from the rectification column (RC) condensers, the final purification column and the pure cuts alcohol trap, are delivered onto the supply plate of the column for concentration of methanol and head impurities. Head impurities concentrate is bled from this column condenser while still liquor is returned into the brew. Brew distillate epuation is performed with delivery of hydraulic selection water onto the epuration column (EC) upper plate having a distillation, a digestion and a concentration parts. The brew distillate flow is reduced while fusel alcohol fraction from RC is delivered onto the distillate column (DC) supply plate for better digestion and concentration of head and intermediate impurities in EC, fraction from the condenser whereof directed, together with vapour condensate from the fusel condenser, into the decantator for delamination into two liquid phases. The lower water stratum of liquid from the decantator and hydraulic selection water are delivered onto the DC upper plate while vapour condensate from the DC condenser is joined with the upper stratum of liquid from the decantator and discharged from the brew rectification system as the head and intermediate impurities fraction. From the liquid phase of the DC digestion part lower plates one bleeds the fraction of ethanol cleared of impurities which is directed onto the EC distillation part upper plate.

EFFECT: production of rectified alcohol of improved quality at reduced cost.

1 dwg, 2 ex, 1 tbl