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Title:
BIRCH BARK PROCESSING AND THE ISOLATION OF NATURAL PRODUCTS FROM BIRCH BARK
Document Type and Number:
WIPO Patent Application WO2001010885
Kind Code:
A3
Abstract:
The invention provides methods for separating outer birch bark from inner birch bark. The invention also provides methods for isolating betulin; lupeol; betulinic acid; 9,10-epoxy-18-hydroxyoctadecanoic acid; 9,10,18-trihydroxyoctadecanoic acid; polyphenolic polymers and fatty acids from birch bark.

Inventors:
KRASUTSKY PAVEL A (US)
CARLSON ROBERT M (US)
NESTERENKO VITALIY V (US)
KOLOMITSYN IGOR V (US)
EDWARDSON CHRIS F (US)
Application Number:
US0021829W
Publication Date:
September 27, 2001
Filing Date:
August 10, 2000
Export Citation:
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Assignee:
UNIV MINNESOTA (US)
KRASUTSKY PAVEL A (US)
CARLSON ROBERT M (US)
NESTERENKO VITALIY V (US)
KOLOMITSYN IGOR V (US)
EDWARDSON CHRIS F (US)
International Classes:
C07D301/32; B01D11/00; C07C29/76; C07C29/86; C07C35/44; C07C51/367; C07C51/43; C07C51/47; C07C59/01; C07C59/105; C07C62/06; C07D303/38; C07J63/00; D21B1/02; (IPC1-7): C07J63/00; C07C51/367; C07C59/10; C07D301/32; C08L61/06; D21B1/02
Domestic Patent References:
WO1997016590A11997-05-09
Foreign References:
US3826433A1974-07-30
US5750709A1998-05-12
Other References:
DATABASE PAPERCHEM2 [online] GELES, I. S.: "Bark as Fuel", XP002154152, retrieved from STN Database accession no. 4964
FUCHINO HIROYUKI ET AL: "Chemical evaluation of Betula species in Japan. II. Constituents of Betula platyphylla var. japonica.", CHEMICAL & PHARMACEUTICAL BULLETIN (TOKYO), vol. 44, no. 5, 1996, pages 1033 - 1038, XP002154151, ISSN: 0009-2363
DATABASE PAPERCHEM2 [online] ECKERMAN, C. ET AL: "Comparison of Solvents for Extraction and Crystallization of Betulinol from Birch Bark Waste", XP002154153, retrieved from STN Database accession no. 4321
DATABASE BIOSIS [online] BIOSCIENCES INFORMATION SERVICE, PHILADELPHIA, PA, US; 1997, VILEGS JANETE H ET AL: "Extraction of low-polarity compounds (with emphasis on coumarin and kaurenoic acid) from Mikania glomerata ('guaco') leaves.", XP002163896, Database accession no. PREV199799805753
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