发明名称 |
METHOD FOR CHEMICAL PROCESSING OF BIRCH BARK WITH EXTRACTION OF SUCH PRODUCTS AS BETULIN AND SUBERIN |
摘要 |
FIELD: chemistry. ^ SUBSTANCE: birch bark from which bast fibre has been removed is crushed. Alkali and a mixture of isobutyl alcohol and water are then added. The reaction mass is then heated at boiling point for 2 hours. Use of isobutyl alcohol in the azeotropic mixture enables to obtain a hot reaction solution in form of a two-phase system. The reaction solution is separated by settling or separation on an organic alcohol-water and water-alcohol layer. Betulin is extracted from the alcohol-water layer through two-step crystallisation with intermediate evaporation. Suberin is obtained from the water-alcohol layer by distilling alcohol and evaporating the aqueous solution. ^ EFFECT: method simplifies the technique of extracting betulin and suberin from birch bark with high quality of the end products. ^ 1 tbl, 1 ex |
申请公布号 |
RU2439093(C1) |
申请公布日期 |
2012.01.10 |
申请号 |
RU20100124451 |
申请日期 |
2010.06.15 |
申请人 |
MAL'CHIKOV EVGENIJ LEONIDOVICH;LEKANOVA ANASTASIJA EVGEN'EVNA;FOMENKO EVGENIJ VLADIMIROVICH |
发明人 |
MAL'CHIKOV EVGENIJ LEONIDOVICH;LEKANOVA ANASTASIJA EVGEN'EVNA;FOMENKO EVGENIJ VLADIMIROVICH |
分类号 |
C08H8/00 |
主分类号 |
C08H8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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