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2 340 624

(13)

(51)

IPC

C07J53/00(2006-01-01)

C07J63/00(2006-01-01)

(21) (22)

Application

2007126469/04, 2007-07-11

(24)

Start date

2007-07-11

(22)

Actual filing date

2007-07-11

(45)

Published

2008-12-10

(72)

Inventor

Levdanskij Vladimir AleksandrovichLevdanskij Aleksandr VladimirovichKuznetsov Boris Nikolaevich

(73)

Holder

Institut Khimii I Khimicheskoj Tekhnologii So Ran So Ran)

METHOD OF OBTAINING BETULIN Russian patent published in 2008 - IPC C07J53/00 C07J63/00

Abstract RU 2340624 C1

FIELD: chemistry.

SUBSTANCE: birch bark is preliminary crashed till particle size is 1-3 mm and is subjected to alkaline hydrolysis in presence of potassium hydroxide or sodium hysroxide under following conditions: alkali concentration is from 15 to 25%, hydromodule is 5-6, temperature is 100°C, hydrolysis duration 1-2 h. Betulin is isolated from hydrolyzed reaction mass by extraction with lower aliphatic alcohols - methyl, ethyl or isopropyl.

EFFECT: simplicity of realization, high yield and improvement of betulin quality.

1 cl, 1 ex, 2 tbl, 1 dwg

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RU 2 340 624 C1

Authors

Levdanskij Vladimir Aleksandrovich

Levdanskij Aleksandr Vladimirovich

Kuznetsov Boris Nikolaevich

Dates

2008-12-10—Published

2007-07-11—Filed