碳基固体酸催化印楝树油与甲醇的酯交换反应

Transesterification of Azadirachta Indica Oil with Methanol Catalyzed by Cardon-Based Solid Acid Catalyst

制备了碳基固体酸催化剂,用红外光谱分析、元素分析、XRD分析和热重分析对所制备的催化剂进行了定性定量研究;用碳基固体酸催化印楝油与甲醇的酯交换反应,研究了相关因素对反应的影响,用高效液相色谱法分析反应中TG、DG、MG和FAME的含量,结果表明,用碳基固体酸催化印楝树油与甲醇的酯交换反应非常有效,最佳反应条件(油酯与甲醇的物质的量比率固定在1:12)是:催化剂用量为油酯质量的10%,反应温度为120℃,反应时间为8h,反应原料中脂肪酸质量分数不大于10%,水的质量分数不大于5%,酯交换率可达95%。这种催化剂循环使用10次,酯交换率没有下降。

A cardon-based solid acid catalyst was prepared and its characteristics were studied through FT-IR spectra, elemental analysis （EA）, X-ray diffraction （XRD） analysis and thermogravimetrican analysis（TGA）. The catalyst was used in transesterification of Azadirachta indica oil with methanol, the relative factors influncing the transesterification were studied and the contents of TG, DG, MG and FAME were analyzed by HPLC analysis. The result showed that it was effective to use the cardon-based solid acid catalyst in catalyzing the transesterification of Azadirachta indica oil with methanol, and the best reaction conditions （the ratio of oil to methanol 1：12 ） were the ratio of catalyst to Azadirachta indica mass part 10 %, the reaction temperature 120℃ the reaction time 8 hours, the FFAs content less than 10 % in Azadirachta indica oil, the water content less than 5 % in Azadirachta indica oil and the ratio of transesterification was to 95 % .The catalyst was reused for 10 times while the ratio of transesterification would not decrease.