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2 458 934

(13)

(51)

IPC

C07J53/00(2006-01-01)

C07J63/00(2006-01-01)

(21) (22)

Application

2011129999/04, 2011-07-19

(24)

Start date

2011-07-19

(22)

Actual filing date

2011-07-19

(45)

Published

2012-08-20

(72)

Inventor

Levdanskij Vladimir AleksandrovichLevdanskij Aleksandr VladimirovichKuznetsov Boris Nikolaevich

(73)

Holder

Uchrezhdenie Rossijskoj Akademii Nauk Institut Khimii I Khimicheskoj Tekhnologii Sibirskogo Otdelenija Ran So Ran)

METHOD OF PRODUCING BETULIN Russian patent published in 2012 - IPC C07J53/00 C07J63/00

Abstract RU 2458934 C1

FIELD: chemistry.

SUBSTANCE: invention relates to separation of betulin - a valuable organic compound used in medicine, chemical and perfume-cosmetic industry. The method involves hydrolysis of birch bark while boiling and intense stirring in an aqueous solution of 15-25% alkali with hydromodulus 8-10 in the presence of C₃ or C₄ alcohol for 3-4 hours. After layering of the reaction mass, the alcohol layer is separated and concentrated. The dry residue is washed with water.

EFFECT: simplification of the method by combining steps for alkaline hydrolysis of birch bark and extraction with alcohol, cutting duration of the process; method enables to achieve 95-97% extraction of betulin from birch bark.

1 cl, 2 tbl, 1 ex

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RU 2 458 934 C1

Authors

Levdanskij Vladimir Aleksandrovich

Levdanskij Aleksandr Vladimirovich

Kuznetsov Boris Nikolaevich

Dates

2012-08-20—Published

2011-07-19—Filed