METHOD OF PRODUCING PHENOLIC EXTRACT FOR STRONG DRINK Russian patent published in 1996 - IPC

FIELD: food industry. SUBSTANCE: method involves triple extraction of thermally treated raw (grape seeds, oak chips, milled grape vines) with aqueous-spirituous solutions (strong is 65-75 vol.% at the first extraction step, 38-43 vol. % at the second and 18-22 vol.% at the third ones. At the process of the third extraction extractant is acidified with food acid up to 5-10 g/dm³. After extraction the second and third fractions were combined, vacuum-wort is added up to the sugar content 8-12 g/100 cm³ and subjected for thermic treatment at 55-75 C for 5-10 days. Ascorbic acid at concentration 0,5-3,0 g/dm³ is added in the process of thermic treatment. After cooling all extract fractions were mixed, kept for 10 day, not less, and fed to the strong drinks production. EFFECT: improved method of extract producing. 2 tbl