RECTIFIED ALCOHOL PRODUCTION PROCESS Russian patent published in 2007 - IPC C12P7/06 B01D3/14 

FIELD: alcohol production industry.

SUBSTANCE: Alcohol is first extracted by boiling from brew on the brew column while transferring ethyl alcohol with accompanied impurities into brew distillate together with vapor leaving the column. Brew distillate is freed of top and intermediate impurities, including fusel oil components, on epuration column while supplying hot water onto upper plate. Epurate is rectified on alcohol column wherein fractions of fusel oil, fusel alcohol, and non-pasteurized alcohol are recovered. Fractions of top and intermediate impurities of ethyl alcohol are distilled on distillation columns. Ethyl alcohol is further purified in distillation sections of epuration and distillation columns by way of removing fusel oil fractions from vapor phase of plates in their mediate zones, whereas organic acids and other tail impurities are withdrawn with distillation water from epuration and distillation column bottoms. Epurate is concentrated, withdrawn from liquid phase of lower plates of boiling-extraction section of epuration column and passed to feeding plate of rectification column. Ethyl alcohol fraction is withdrawn from liquid phase of lower plates of extraction-distillation section of distillation column and passed to feeding plate of epuration column. Fractions from condensers of rectification and methanol columns and from alcohol-trap for pure distillates are passed to feeding plate of additional column, from the condenser of which top impurities concentrate is discharged. Bottom liquid is supplied to feeding plate of rectification column.

EFFECT: improved quality of rectified alcohol and reduced production expenses.

1 dwg, 1 tbl, 2 ex