【摘要】：為脫除飽和脂肪酸甲酯,得到合格的脂肪酸酯類柴油抗磨劑(飽和脂肪酸酯含量不高于2.5%),以生物柴油為原料,采用冷凍結(jié)晶法,考察了冷凍溫度、攪拌速度、冷凍方式和原料組成對(duì)飽和脂肪酸甲酯脫除效果的影響。結(jié)果表明:過(guò)高的攪拌速度產(chǎn)生細(xì)小晶體,不利于晶體和熔融液的分離;冷凍溫度與原料中棕櫚酸甲酯的含量有關(guān),當(dāng)原料中棕櫚酸甲酯的含量低于1.2%時(shí),在-5℃下靜置冷凍結(jié)晶,可以得到符合抗磨劑要求的產(chǎn)品,如果原料中棕櫚酸甲酯的含量超過(guò)1.2%,必須在-20℃下進(jìn)行靜置冷凍結(jié)晶處理;逐級(jí)降溫靜置冷凍結(jié)晶方法有利于提高生物柴油中飽和脂肪酸甲酯的脫除效果和脂肪酸甲酯的收率,在-15℃下處理即可獲得符合抗磨劑要求的產(chǎn)品。
[Abstract]:In order to remove saturated fatty acid methyl ester, a qualified antiwear agent of fatty acid ester diesel oil (the content of saturated fatty acid ester is less than 2.5%) was obtained. The freezing temperature and stirring speed were investigated by freezing crystallization method with biodiesel as raw material. Effects of freezing method and raw material composition on removal of saturated fatty acid methyl ester. The results showed that the high stirring rate produced fine crystals, which was not conducive to the separation of crystals and melts, and the freezing temperature was related to the content of methyl palmitate in raw materials, when the content of methyl palmitate in raw materials was less than 1.2%. If the content of methyl palmitate in the raw material exceeds 1.2%, the frozen crystallization must be carried out at -20 鈩，

本文編號(hào)：2125647