以米糠油加工所得副产物米糠蜡糊为原料,进行乙酸乙酯间歇式逆流萃取米糠蜡的研究.得到的最佳萃取条件为:溶剂比3:1,萃取温度75℃,萃取时间30 min,冷却温度20℃,冷却时间2h,逆流萃取3次.此工艺所得米糠蜡得率可达70％,纯度为99.0％,熔点76℃.%Rice bran wax paste, the by - product of rice bran oil processing, was used as raw material to prepare rice bran wax by batch countercurrent extraction with ethyl acetate. The optimal extraction conditions were as follows: ratio of ethyl acetate to rice bran wax paste 3∶1, extraction temperature 75 ℃, extraction time 30 min, cooling temperature 20 ℃, cooling time 2 h, countercurrent extraction times 3. Under these conditions, the yield of rice bran wax could reach 70% with purity 99.0% and melting point 76 ℃.
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