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

FIELD: food industry.

SUBSTANCE: common buckwheat flowers 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 common buckwheat flowers are entered into suspension, moulded, dried to residual humidity 13-15%, then cut, impregnated with CO₂-miscella of common buckwheat flowers 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 for food purpose.