首页>
外国专利>
PURIFICATION OF BETA-SITOSTEROL ISOLATED FROM NON-SAPONIFIED MATTER IN CRUDE SOAP BY CELLULOSE SULFATE PROCESS
PURIFICATION OF BETA-SITOSTEROL ISOLATED FROM NON-SAPONIFIED MATTER IN CRUDE SOAP BY CELLULOSE SULFATE PROCESS
展开▼
机译:纤维素硫酸盐纯化粗皂中非皂化物质中的β-甾醇
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention relates to a process for the preparation of beta -sitosterol having a low content of alpha -sitosterol of a sterol mixture isolated from the unsaponifiables obtained from crude soap from the sulphate cellulose process. The invention is based on crystallization of the sterol mixture from a mixture of an organic solvent and water, preferably 1,2-dichloroethylene or methyl ethyl ketone and water. By means of the process according to the invention, from starting materials containing 20 to 25% alpha -sitosterol is obtained a product which contains less than 5% alpha -sitosterol and which, when required, can be retreated by means of the process according to the invention to obtain beta -sitosterol containing less than 1% alpha -sitosterol. When using methyl ethyl ketone as organic solvent, beta -sitosterol is also purified of any betulin contained in the starting material.
展开▼