초록 ▼

Process for production of tea catechins selected from (-) epicatechin, (-) epigallocatechin, (-) epicatechin gallate and (-) epigallocatechin gallate comprising extracting tea leaves with hot water or an aqueous solution of methanol, ethanol or acetone, washing the extract containing solution with c

Process for production of tea catechins selected from (-) epicatechin, (-) epigallocatechin, (-) epicatechin gallate and (-) epigallocatechin gallate comprising extracting tea leaves with hot water or an aqueous solution of methanol, ethanol or acetone, washing the extract containing solution with chloroform, transferring the washed solution into an organic solvent, removing the solution and passing the resulting solution through a reversed phase column in the presence of an eluting solution. Tea catechins and methods of using the same are also disclosed.

대표청구항 ▼

A process for producing tea catechins selected from the group consisting of (-) epicatechin, (-) epigallocatechin, (-) epicatechin gallate, and (-) epigallocatechin gallate, which comprises the steps of extracting tea leaves selected from the group consisting of unfermented tea and half-fermented te

A process for producing tea catechins selected from the group consisting of (-) epicatechin, (-) epigallocatechin, (-) epicatechin gallate, and (-) epigallocatechin gallate, which comprises the steps of extracting tea leaves selected from the group consisting of unfermented tea and half-fermented tea with hot water or a solvent selected from a group consisting of a 40-75% aqueous solution of methanol, a 40-75% aqueous solution of ethanol and a 30-80% aqueous solution of acetone to obtain an extract-containing solution; washing the extract-containing solution with chloroform; contacting the washed solution with an organic solvent selected from the group consisting of ethyl acetate, n-butanol, methyl isobutyl ketone, and acetone to transfer the extract into said organic solvent; distilling away the organic solvent to yield a concentrated solution containing the extract; and passing the extract through a reversed phase column in the presence of an eluting solution consisting essentially of 0-25 volume % of acetone, 0-35 volume % of tetrahydrofuran and 65-85 volume % of water to thereby obtain said tea catechins.