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

FIELD: food industry.

SUBSTANCE: walnut leaves are sequentially extracted with non-polar liquified gas and drinking water with subsequent obtaining corresponding extracts. Tea preparation waste is mixed with liquid carbon dioxide, 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 suspended in water solution of edible acid; carbonic acid calcium and magnesium salt and water extract of walnut leaves are entered into suspension. Suspension is moulded, dried to residual humidity 13-15%, cut, impregnated with gas-liquid extract of walnut leaves and preliminary separated miscella with simultaneous pressure boost. It is followed by depressurisation to atmosphere pressure with simultaneous freezing of absorbed carbon dioxide and subliming it with obtaining end product.

EFFECT: total tea waste utilisation.