METHOD OF BREWING FLAVOURED DARK BEER Russian patent published in 2010 - IPC C12C12/00 

FIELD: chemistry.

SUBSTANCE: ajiwan and hop are mixed. The obtained mixture is extracted using liquid nitrogen with separation of the corresponding miscella. Girasol is cut and dried in a microwave field with given process parametres and then roasted. The girasol is mixed with malt. The obtained mixture is saturated with the separated miscella while simultaneously increasing pressure. Pressure is decreased to atmospheric pressure level with simultaneous freezing of the mixture. The mixture undergoes cryogenic grinding in the medium of released nitrogen. Water is added and the mixture is saccharified to obtain wort. Brewing yeast is added. Primary fermentation is carried out and then fortification, after fermentation and filtration.

EFFECT: method shortens duration of the process and increases foam stability of the end product.