METHOD FOR PREPARATION OF PLANT EXTRACT

Title:

METHOD FOR PREPARATION OF PLANT EXTRACT

Document Type and Number:

WIPO Patent Application WO/2006/109405

Kind Code:

A1

Abstract:

It is intended to develop a technique for producing a water-soluble polyphenol at high purity and with high efficiency in a short time from hop bract or the like which is a by-product in the beer brewing. A method for preparation of a purified plant extract comprising steps of treating a plant extract with a clay mineral such as bentonite and removing any divalent cations from the resulting product; a method for producing a polyphenol comprising steps of passing the purified plant extract through a column to adsorb polyphenols onto the column and passing a solvent through the column to elute a water-soluble polyphenol from the column; and a method for producing a water-soluble hot bract polyphenol comprising steps of adding bentonite to a hop bract extract and allowing the resulting mixture to stand under acidic conditions, performing solid-liquid separation to produce a supernatant, purifying the supernatant through a column to give a polyphenol-containing fraction, cooling the fraction and allowing the cooled fraction to stand to cause the precipitation of water-insoluble ingredients and performing solid-liquid separation to give the desired water-soluble hop bract polyphenol.

Inventors:

WATANABE TAKEHIRO (JP)
FUJITA RUMI (JP)

Application Number:

PCT/JP2006/305230

Publication Date:

October 19, 2006

Filing Date:

March 16, 2006

Export Citation:

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Assignee:

ASAHI BREWERIES LTD (JP)
TAGASHIRA MOTOYUKI (JP)
KANDA TOMOMASA (JP)
HIGUCHI SEIICHI (JP)
TANABE MASAYUKI (JP)
WATANABE TAKEHIRO (JP)
FUJITA RUMI (JP)

International Classes:

C07G99/00; A23L5/30

Domestic Patent References:

WO2004052898A1

2004-06-24

Foreign References:

JPH06502763A	1994-03-31
JPS6317899A	1988-01-25

Other References: