【摘要】 制备了磺化碳固体酸催化剂,用红外光谱、元素分析、X射线衍射(XRD)和热重分析对所制备的催化剂进行了定性定量研究。用磺化碳固体酸催化麻疯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甘油三酯(TG)、甘油双酯(DG)、甘油单酯(MG)和脂肪酸甲酯(FAME)的含量,结果表明,用磺化碳固体酸催化麻疯油与甲醇的酯交换反应非常有效,最佳反应条件(甲醇与麻疯油物质的量之比固定为12∶1):催化剂用量为麻疯油质量的10%,反应温度120℃,反应时间8 h,反应原料中含脂肪酸不大于10%,含水量不大于5%,酯交换率可达到95%左右。这种催化剂循环使用10次,酯交换率没有下降。更多还原

【Abstract】 A sulfonated cardon solid-acid catalyst was prepared,and its characterization was studied by FT-IR spectra,elemental analysis(EA),X-ray diffraction(XRD) and thermogravimetrical analysis(TGA).The catalyst was used in transesterification of Jatropha curcas L.seed oil with methanol,and effects of various factors on transesterification were studied.The contents of TG,DG,MG and FAME were analyzed by HPLC analysis.The result showed that it was very effective for the transesterification of J.curcas seed oil with methanol catalyzed by sulfonated cardon solid-acid catalyst,and the optimum reaction condition(the ratio of methanol to oil 12∶1) was: ratio of catalyst to J.curcas oil(mass fraction) 10%,reaction temperature 120℃,reaction time 8h,fatty acid content less than 10% in J.curcas oil,water content less than 5% in J.curcas oil.The conversion rate of transesterification was up to 95%,which was not decreasd when the catalyst was used for 10 times.更多还原