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

FIELD: food products.

SUBSTANCE: dooryard plantainis leaves are sequentially extracted with liquid carbon dioxide and drinking water to obtain CO₂-miscella and aqueous extract. Tea production waste is mixed with non-polar liquified gas, extracted and minced along with periodic depressurisation of extraction mixture below extracting agent vapour pressure at extraction temperature. Miscella and extraction cake are separated; the latter is suspended in water solution of edible acid; carbonic acid calcium and magnesium salt and water extract of dooryard plantainis leaves are entered into suspension. It is followed by moulding, drying to residual humidity 13-15%, cutting, impregnating with CO₂-miscella of dooryard plantainis leaves and gas-liquid extract of tea waste with simultaneous pressure boost, depressurisation to atmosphere pressure with simultaneous freezing of absorbed carbon dioxide and subliming it with obtaining end product.

EFFECT: total tea waste utilisation.