Title:
METHOD FOR PREPARATION OF EXTRACT CONTAINING CATECHIN TYPE OLIGOMER POLYPHENOL COMPOUND FROM PLANT RESOURCE AND OBTAINED EXTRACT
Document Type and Number:
Japanese Patent JPH08169838
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for economically preparing an extract containing a biologically active oligomeric polyphenolic compound. SOLUTION: This method comprises (a) subjecting a plant to extractin with hot water, (b) precipitating tannins from the obtained water phase by addition of a mineral salt, (c) treating the filtrate with ethyl acetate, (d) concentrating the obtained organic phase, (e) adding distilled water, (f) removing ethyl acetate by evaporation under reduced pressure, (g) washing the obtained water phase with a chlorinated solvent at least once, (h) eliminating the residual chlorinated solvent from the washed water phase and (i) drying the obtained water phase condensate to give the extract. The method for preparing the extract containing a biologically active oligomeric polyphenolic compound is economic due to no use of an expensive apparatus such as an ultrafilter. The obtained extract hardly contains an agrochemical.
Inventors:
NUKIRIZA JIIN
MARUTSUERU JIINNKUROODO
MARUTSUERU JIINNKUROODO
Application Number:
JP17465795A
Publication Date:
July 02, 1996
Filing Date:
July 11, 1995
Export Citation:
Assignee:
BERKEM SA (FR)
International Classes:
C07H17/065; A61K36/00; C07D311/62; (IPC1-7): A61K35/78
Attorney, Agent or Firm:
Shusaku Yamamoto