Method of removing caffeine from caffeine-containing catechin compound composition
AssigneeKao Corporation
InventorsYoshikazu Ogura, Susumu Ohishi, Masahiro Fukuda, Hirokazu Takahashi, Eri Itaya, Atsushi Konishi
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Abstract
A process for selectively removing caffeine from a caffeine-containing catechin composition, which comprises dissolving the caffeine-containing catechin composition in a 9/1 to 1/9 by weight mixed solution of an organic solvent and water, and then bringing the resultant solution into contact with activated carbon alone or with activated carbon and also acid clay or activated clay; and a packaged beverage containing such a decaffeinated composition.
Claims21
A process for selectively removing caffeine from a caffeine-containing catechin composition, which comprises dissolving said caffeine-containing catechin composition in a 9/1 to 1/9 by weight mixed solution of an organic solvent and water, and then bringing the resultant solution into contact with activated carbon.
A process for selectively removing caffeine from a caffeine-containing catechin composition, which comprises dissolving said caffeine-containing catechin composition in a 9/1 to 1/9 by weight mixed solution of an organic solvent and water, and then bringing the resultant solution into contact with activated carbon and also acid clay or activated clay.
A process for producing a green tea extract, which comprises dissolving a caffeine-containing catechin composition in a 9/1 to 1/9 by weight mixed solution of an organic solvent and water, and then bringing the resultant solution into contact with activated carbon to selectively remove caffeine.
A process for producing a green tea extract, which comprises dissolving a caffeine-containing catechin composition in a 9/1 to 1/9 by weight mixed solution of an organic solvent and water, and then bringing the resultant solution into contact with activated carbon and also acid clay or activated clay to selectively remove caffeine.
A caffeine-containing tea extract, wherein:
- (a) a content of gallates in non-polymer catechins is from 45 to 60 wt %,
- (b) a weight ratio of said non-polymer catechins to caffeine is from 8 to 40,
- (c) a weight ratio of said non-polymer catechins to (sucrose+glucose) is from 2 to 15, and
- (d) dietary fibers amount to 0.5 wt % or less of a solid content.
A process for purifying a solid concentrate of a tea extract, said solid concentrate comprising from 25 to 40 wt % of non-pol.rmer catechins, which comprises adding said solid concentrate to a 10/0 to 8/2 by weight solvent of an organic solvent and water, adding water to the resultant mixture to adjust a weight ratio of said organic solvent to water to from 9/1 to 5/5, removing undissolved solids, and then, distilling off said solvent.
A process for purifying a solid concentrate of a tea extract, said solid concentrate comprising from 25 to 40 wt. % of non-polymer catechins, which comprises adding said solid concentrate to a 10/0 to 8/2 by weight solvent of an organic solvent and water, adding water to the resultant mixture to adjust a weight ratio of said organic solvent to water to a range of from 9/1 to 5/5, removing solids from the resultant suspension, and then, distilling off said solvent from a remaining liquid phase.
A process for purifying a solid concentrate of a tea extract, said solid concentrate comprising from 25 to 40 wt % of non-polymer catechins, which comprises dissolving said solid concentrate in a mixed solvent of water and an organic solvent, adding an organic solvent to the resultant solution to adjust a weight ratio of said organic solvents to water to a range of from 9/1 to 5/5 such that a precipitate is formed, separating solids from the resultant suspension, and then, distilling off said organic solvents from a remaining liquid phase.
A green tea extract wherein a content weight ratio [(A)/(B)] of (A) non-polymer catechins to (B) total polyphenols is from 0.83 to 0.96.
Dependencies are inferred from the claim text.