从对回收所得的粗羊毛脂中所含杂质进行分类处理的思路出发，得出对羊毛脂进行精制的三个步骤。

Based on the idea of classifying and then disposing impurities in the crude lanolin recovered from wastewater of wool-washing, three steps to refine lanolin are presented.

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研究了以粗羊毛脂为原料提取胆甾醇的工艺过程，重点研究了从羊毛脂醇中提取胆甾醇的工艺过程。

In the paper, the process of extraction of cholesterol from crude lanolin was studied, and the one from lanolin alcohol which is one of saponification production of lanolin were focused on.

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