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Patent Searching and Data


Title:
METHOD FOR TREATING BIRCH BARK AND THE USE OF THE PRODUCT
Document Type and Number:
WIPO Patent Application WO/2012/160250
Kind Code:
A3
Abstract:
The present invention provides an improved method for obtaining a bark extract by hydrolysis and acidification in the presence of water. The method comprises the steps of subjecting birch bark to hydrolysis; separating the undissolved bark portions from the hydrolysis liquid; providing a liquid phase and acidifying this liquid phase; precipitating the extracts from the liquid phase by raising the relative amount of water in the liquid phase and recovering the extract. Further the invention relates to an animal feed obtainable by this method and to the use of the birch bark extract in food, animal feed, pulp, paper and board, pigments and barriers for paper coating.

Inventors:
HOTANEN ULF (FI)
PIETARINEN SUVI (FI)
Application Number:
PCT/FI2012/050469
Publication Date:
April 25, 2013
Filing Date:
May 15, 2012
Export Citation:
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Assignee:
UPM KYMMENE CORP (FI)
HOTANEN ULF (FI)
PIETARINEN SUVI (FI)
International Classes:
A23K10/32; A23L1/30; C07J53/00; C07J63/00
Domestic Patent References:
WO2007121482A12007-10-25
Foreign References:
RU2138508C11999-09-27
Other References:
DATABASE WPI Week 197410, Derwent World Patents Index; AN 1974-18980V, XP002684597
Attorney, Agent or Firm:
BORENIUS & CO OY AB (Helsinki, FI)
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