METHOD OF RECTIFIED ALCOHOL PRODUCTION Russian patent published in 2008 - IPC C12P7/06 

FIELD: food industry.

SUBSTANCE: invention relates to distilling industry. Method implies manufacturing of rectified alcohol by epuration of wash in the epuration zone of the wash epuration column, boiling alcohol out of wash in the boiling out zone of the column, separating the vapour flow in the hollow insertion between epuration and boiling out zones into two fractions one of which is used for heating the epuration zone and the other is used for heating the epuration column, purifying the wash distillate from attendant impurities using hydroselection, rectifying epurate and withdrawing fractions of fused oil, fused alcohol and unpasteurised alcohol. Rectification processes are carried out under increased pressure in boiling out, wash epuration and epuration columns and under reduced pressure in alcohol and methanol columns. Boiling out and epuration columns are heated by live steam. Water-alcohol vapour from the upper plate of the boiling out column is supplied to the boiler of the wash epuration column; secondary vapour from the boiler is used for heating the wash epuration column and the condensate produced is delivered to the still part of the alcohol column. Epurated water-alcohol vapour from the hollow insertion of the wash epuration column is supplied to the vapour zone of upper plate in the epuration column withdrawing part and is additionally used for heating of boiling out and concentrating parts of the column. Vapour from the upper plate of the wash epuration column is supplied to the first boiler of the alcohol column, heat resulting from condensation of this vapour is used for heating alcohol column and uncondensed part of the vapour is supplied to the condenser of the wash epuration column. The epuration column is fed by the liquid from the above condenser together with fractions from the condenser of the carbon dioxide separator, alcohol catcher of the dirty distillate cuts and vapour condensate from the tube space of the first alcohol column boiler. Ethyl alcohol is additionally purified from intermediate impurities by removing fused oil fraction from vapour phase of the middle zone plates in the epuration column withdrawing part and intermediate impurities fraction from liquid phase of the plates in the boiling out part below epurate withdrawing point as well as from organic acids and other tail impurities by withdrawing luther from the epuration column still. The epurate is fortified by ethyl alcohol, removed from the liquid phase of the upper plates in the lower part of the epuration column boiling out zone and is supplied to the alcohol column still, the still liquid is heated with the heat of luther from the boiling out column still and is supplied to the upper plate. Concentrating part of the epuration column is divided into upper and lower zones by a baffle fitted with a receiver for draining liquid. Vapour from the vapour space of the upper plate of the lower zone is withdrawn through the side nozzle and is fed to the tube space of the methanol column boiler where heat resulting from partial condensation of the vapour is used for heating the methanol column. The produced condensate is supplied to the upper plate in the lower zone of the epuration column concentrating part. Uncondensed vapour is supplied to the vapour space over the baffle and is used for heating the upper zone of the column concentrating part, the upper plate in it is fed with fused alcohol fraction from the alcohol column, intermediate impurities fraction from the epuration column boiling out part and hydroselected water. In the above upper zone head and intermediate impurities are concentrated with increased specific discharge of hydroselected water, vapour from the vapour line of the epuration column is supplied to the second boiler of the alcohol column, the alcohol column is heated with the secondary vapour from the boiler. The vapour condensate from the second boiler tube space is supplied to the upper plate of the epuration column. Uncondensed vapour enriched with impurities is supplied to the condenser of the epuration column where head and intermediate impurities fraction is removed and withdrawn out of the wash rectifying system. The invention ensures manufacturing of rectified alcohol of improved quality along with reducing costs for its manufacturing.

EFFECT: manufacturing of rectified alcohol of improved quality along with reducing costs for its manufacturing.

1 dwg, 2 tbl, 2 ex