离子液体催化制备生物柴油的试验研究

Research on biodiesel production with ionic liquid

制备了一种水溶性正丁基吡啶硫酸氢盐离子液体,运用红外光谱、热重分析等方法对所制备离子液体进行表征,数据表明与预期结构相符.以该离子液体为催化剂催化小桐子油脂肪酸制备生物柴油,考察了试验反应温度、甲醇与小桐子油脂肪酸体积比、离子液体催化剂用量等因素对试验转化率的影响.结果表明在反应温度100℃、催化剂用量为小桐子油脂肪酸质量的6%、醇酸体积比1∶1、反应时间75 min的条件下反应转化率可达96%以上.离子液体稳定性较好,循环使用6次依然保持较高的催化转化率.

A water- stable ionic liquid 1 -butyl -pyridinium hydrosulfate has been synthesized, and it has been checked by FTIR and TGA. Then it was used as a catalyst to catalyze fatty acids of Jatropha curcas L. seed oil for biodiesel. It showed that the yield was more than 96% ,under the conditions：temperature 100℃ ,mass per- centage of the catalytic relative to fatty acids 6%, V（methanol） ： V（ fatty acids） -- 1：1 ,and time 75 minutes. The ionic liquid was stable. After six times recycling, it still remained high catalytic conversion rates.