PRODUCTION METHOD OF RECONSTITUTED FLAVOURED TEA Russian patent published in 2009 - IPC A23F3/00 

FIELD: food products.

SUBSTANCE: hibiscus flowers are sequentially extracted by non-polar liquefied gas and drinking water with obtaining of corresponding extracts. Tea production refuses are mixed with fluid carbon dioxide, they are extracted and minced along with periodic depressurisation of extraction mixture below carbon dioxide vapour pressure at extraction temperature. Miscella and extraction cake are separated. The latter is dissolved in water solution of edible acid. Calcium and magnesium salt of carbonic acid and water extract of hibiscus flowers is added to the liquor. Then it is formed, dried till residual humidity 13-15%, cut, impregnated with gas-liquid extract of hibiscus flowers and previously separated miscella with simultaneous pressure boost. After that depressurisation till atmosphere pressure with simultaneous freezing of absorbed carbon dioxide and its subliming with obtaining of end product are performed.

EFFECT: obtaining product from tea waste products.