Production process of purified green tea extract

Details Production process of purified green tea extract Production process of purified green tea extract

2011-07-19

2011-07-19

Mi, Qiuwen (Department: 1655)

Drug, bio-affecting and body treating compositions

Plant material or plant extract of undetermined constitution...

Containing or obtained from camellia

C424S725000, C426S597000

Reexamination Certificate

active

07981449

ABSTRACT:
Provided is a process for producing a purified green tea extract of high quality by readily and efficiently purifying a green tea extract in a simple manner. A process for producing a purified product of green tea extract, which includes subjecting an aqueous solution of green tea extract to solid-liquid separation by filtration and/or centrifugal separation to obtain another aqueous solution of green tea extract, said another aqueous solution having a turbidity of from 0.2 to 2.0 as measured with a concentration of non-polymer catechins in it adjusted to 1 wt %, and then allowing the another aqueous solution of green tea extract to pass through a polymer membrane having a membrane pore size of from 0.05 to 0.8 μm such that the turbidity of the another aqueous solution of green tea extract is reduced to lower than 0.2 as measured with a concentration of non-polymer catechins in it adjusted to 1 wt %.

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