METHOD OF PRODUCING DEHYDRATED ETHYL ALCOHOL Russian patent published in 2012 - IPC C07C31/08 C07C29/74 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing dehydrated ethyl alcohol, which can be used in chemical, electronic and pharmaceutical industry. The method involves feeding crude alcohol or a water-alcohol solution into a preliminary dehydration column operating under a vacuum to obtain a distillate which is fed into a final dehydration column operating at excess pressure, where dehydrated alcohol is collected in form of a residue and the distillate is fed into the preliminary dehydration column in form of reflux. The distillation process in the preliminary dehydration column takes place at absolute pressure of 8.0-13.3 kPa to obtain a distillate with alcohol content 98.2-98.9 vol. %, and the distillation process in the final dehydration column takes place at absolute pressure 0.1-0.5 MPa and alcohol content in the reflux of 96.5-97.2 vol. %.

EFFECT: method enables to obtain an end product of high quality using an improved an improved process scheme.

1 tbl, 1 dwg, 2 ex