| 摘要 |
<p>beta -Sitosterol is isolated in yields over 90% as a hydrate from a steroid mixture, separated from the neutral fraction of raw soap, by dissolving the said mixture in a solvent and precipitating the hydrate by addition of water. Thus, the process may be operated by heating the said mixture with a solvent, e.g. acetone or isopropanol, and adding water. When the mixture is cooled to 15 DEG C or below, a product rich in beta -sitosterol crystallizes out as a hydrate. This product may contain, in addition to the beta -sitosterol, at most 4% alpha -sitosterol, 7% campesterol and 0.5% other impurities.</p> |
