选择3种脱色剂，即活性白土、活性炭和凹凸棒土，互相配比成复合脱色剂，对蚕蛹油进行脱色实验，并以脱色效果综合指标作为考察指标.研究结果表明，凹凸棒土的脱色效果最好.对凹凸棒土脱色的各因素进行优化，得出如下脱色最佳条件：凹凸棒土经300 ℃，1 h高温活化，加入量为8 g/100 mL，脱色温度为50 ℃，脱色时间为40 min，搅拌速度为120 r/min.蚕蛹油的罗维朋红色值从脱色前的8.5±0.1降至3.1±0.0，黄色值从70.0±0.0降至22.0±0.0，脱色效果综合指标达到3.979±0.008，油脂损失率为15.5%±0.1%.

Activated bentonite, activated carbon and attapulgite clay were chosen to match each other into a certain proportion to remove pigments in the silkworm pupa oil. Taking the comprehensive indicator of decolorization effects as a quality index, it was found that decolorization effects of the attapulgite clay were the best. The optimum decolorization conditions studied were as follows: clay dosage 8 g attapulgite clay activated at 300 ℃ in 1 h per 100 mL oil, decolorization temperature 50 ℃, decolorization time 40 min, and stirring speed 120 r/min. The Lovibond red value of silkworm pupa oil decreased from 8.5±0.1 to 3.1±0.0 and the yellow value decreased from 70.0±0.0 to 22.0±0.0, the decolorization effect comprehensive indicator is 3.979±0.008, and oil loss is 15.5%±0.1%.