METHOD OF SPECIAL VODKA PRODUCTION Russian patent published in 1997 - IPC

FIELD: alcoholic and liqueur and vodka industry. SUBSTANCE: method involves water filtration through carbon filter, treatment of the softened water by the reverse osmosis, alcoholic mixing preparing by mixing water with high quality ethanol, addition of additional components, exposition and product filtration. After filtration the softened water is subjected for the additional ultradiaphragm treatment and the reverse osmosis treatment is carried out up to iron content in the softened water less 0.1 mg/l, copper - less 0.1 mg/l, oxidizability - less 4.5 O₂ mg/dm³, hardness 0.51-0.76 mg-equiv./l. Alcoholic mixing is prepared from the softened water and high quality ethanol (for example, grain alcohol) where glycerol (0.8-1.2 kg per 1000 dal ready product) is added. Additional filtration before exposition is carried out through carbon layer that is treated preliminary with the softened water up to negative reaction for chloride ions. The ready product is kept for 2-2.5 h. EFFECT: enhanced quality of the end product. 2 cl, 1 tbl