METHOD FOR PRODUCING OF GRASS TEA Russian patent published in 2006 - IPC A23F3/34 

FIELD: food-processing industry, in particular, grass tea processing methods.

SUBSTANCE: method involves treating mixture of mountain cranberry leaves and Jerusalem artichoke flowers with flow of non-polar gas, such as nitrous oxide or argon oxide, at above-critical temperature and pressure parameters, said gases circulating along closed contour at flow velocity exceeding hydraulic size of mixture particles, for 15-20 min; reducing flow temperature to the level below critical value to cause sorption of formerly desorbed substances by mixture particles; reducing pressure to atmospheric pressure value. Grass tea is brewed faster by at least 2 times.

EFFECT: improved quality and more homogeneous composition of grass tea.