PRODUCTION METHOD OF RECONSTITUTED TEA Russian patent published in 2009 - IPC A23F3/40 

FIELD: food products.

SUBSTANCE: walnut leaves are sequentially extracted by liquid carbon dioxide and drinking water with obtaining CO₂-miscella and water extract. Tea production refuses are mixed with non-polar liquified gas, they are extracted and minced along with periodic depressurisation of extraction mixture below carbon dioxide vapour pressure at extraction temperature. Extract and extraction cake are separated. The latter is dissolved in water solution of edible acid. Calciferous or magnesium salt of carbonic acid and water extract of walnut leaves are added to suspension. Then it is formed, dried till residual humidity 13-15%, cut, impregnated with gas-liquid extract of walnut leaves 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: complete utilisation of tea production refuses.