METHOD OF PREPARING BETULINE Russian patent published in 1999 - IPC

Abstract RU 2131882 C1

FIELD: chemical industry, more particularly recovery of valuable chemical products from wood processing waste. SUBSTANCE: method of preparing betuline from birch bark comprises activation thereof at temperature of 180-260 C, pressure of 3-5 MPa for 60-300 s, treatment with alkali and extraction with alcohol. Birch bark is activated and its alkaline hydrolysis is carried out simultaneously, alkali being used in amount of 10-20%, based on weight of absolutely dry birch bark. EFFECT: shorter process time, smaller amount of alkali used in hydrolysis stage. 1 ex, 1 tbl

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RU 2 131 882 C1

Authors

Levdanskij V.A.

Polezhaeva N.I.

Es'Kin A.P.

Vink V.A.

Kuznetsov B.N.

Dates

1999-06-20—Published

1998-03-26—Filed