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

FIELD: food industry.

SUBSTANCE: invention relates to food industry and, particularly, to food rectified alcohol production. According to this method, wash rectification processes are conducted in alcohol or methanol columns under low pressure and in extraction, distillation and epuration columns under high pressure. Extraction and epuration columns are heated by live steam. Water-alcohol steam from upper plate of extraction column is supplied to boiler of distillation column. Secondary steam from boiler is used for heating distillation column. Condensate is supplied to distillation part of alcohol column. Water-alcohol steam from the upper plate of distillation column is supplied to boiler of alcohol column. Secondary steam of boiler is used for heating alcohol column. Steam, which is failed to condense in inter-tubular boiler space, is supplied to distillation column condenser. Liquid from condenser together with water-alcohol condensate from inter-tubular boiler space of alcohol column and fractions from carbon dioxide separator condenser and impure distillate alcohol traps are supplied to epuration column. Distilled liquid of alcohol column is heated by Luther's heat from extraction column still and supplied to upper plate of extraction column. Ethyl alcohol is additionally cleaned in epuration column from intermediate admixtures by separating fusel-oil fraction from steam phase being in middle zone plates of strippant part and intermediate admixtures fraction from liquid phase being in extraction part plates under the point of epurate sampling. Ethyl alcohol is also cleaned from organic acids and other last admixtures by Luther's sampling from epuration column still. Epurate is proved by ethyl alcohol and discharged from liquid phase being in upper plates of lower extraction part in epuration column. Epurate is then supplied to alcohol column still. Concentration part of epuration column is separated by partition provided with a cup for liquid discharge. Partition splits concentration part into top and bottom parts. Besides, steam is taken out from evaporation void of upper plate being in bottom part to inter-tubular space of methanol column boiler through side manifold. Methanol column is heated by partly condensed steam. Generated condensate is supplied to upper plate of bottom concentration part in epuration column. Non-condensed steam is supplied to evaporation void under partition and used for heating top concentration part of the column. Upper plate of epuration column accepts fusel alcohol from alcohol column, intermediate admixtures fraction from extraction part of epuration column and hydro-selected water. Concentration of basic and intermediate admixtures is executed at high specific flow rate of hydro selected water. Admixtures-rich steam from vapour line of epuration column is supplied to related fractioning column where admixtures are additionally concentrated. Then, steam is taken from epuration column condenser in the form of basic and intermediate admixtures and discharged from wash rectification system.

EFFECT: production of high-quality alcohol and reduction of production costs.

1 dwg, 2 tbl, 2 ex