Process for producing catechins
US4248789A · kind A · utility
18Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1979 |
| Grant date | Feb 3, 1981 |
| Priority date | — |
| Expiry date | Dec 13, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing catechins from tannic substance which has been extracted from tea leaves. An aqueous solution of the extract is admixed with an aqueous solution of caffeine to form a liquid-containing mixture of free catechins and a precipitated mixture of ester-type catechins. The caffeine is then removed from the aforesaid mixtures, and the respective mixtures fractionated to obtain epicatechin, epigallocatechin, epicatechin gallate, and epigallocatechin gallate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.