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.
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.
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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