| 摘要 |
<p>The process consists of (a) subjecting lanoline or a deriv. to liquid-liquid extraction using a non-polar hydrocarbon solvent, e.g. a 3-8C aliphatic hydrocarbon, and a solvent mixt. of water and a lower alcohol, e.g. methanol, ethanol or other; and (b) collecting the hydrocarbon extract contg. the lanoline or deriv. with reduced allergenic effect. The ratio of aq. solvent to hydrocarbon solvent is not cirtical, but is pref. 0.1-10:1 by wt..</p> |
