发明名称 |
METHOD OF BETULIN PREPARING |
摘要 |
chemical technology of natural substances. SUBSTANCE: invention relates to a method of production of betulin from a birch external layer bark. Method is carried out by extraction of betulin from the birch ground bark with a mixture of solvents containing petroleum ether at 70-100 C with addition of toluene taken in the amount 30-75% of the total extractant volume followed by crystallization of betulin. The yield of extract is 16-25% of absolutely dry matter in a content of betulin 90-95%. EFFECT: improved method of betulin extraction. 1 tbl, 1 dwg
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申请公布号 |
RU2184120(C1) |
申请公布日期 |
2002.06.27 |
申请号 |
RU20010103062 |
申请日期 |
2001.02.02 |
申请人 |
ROSHCHIN VIKTOR IVANOVICH |
发明人 |
ROSHCHIN V.I.;SHABANOVA N.JU.;VEDERNIKOV D.N. |
分类号 |
C07J53/00;C07J63/00;(IPC1-7):C07J53/00 |
主分类号 |
C07J53/00 |
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