酸离子液体在生物柴油酯交换反应中的催化活性  

Catalytic activities of acidic ionic liquids in bio-diesel trans-esterification

作　　者：柏杨[1,2] 张立明[1] 满瑞林[2] 

机构地区：[1]九江学院化学化工学院,江西九江332005 [2]中南大学化学化工学院,湖南长沙410083

出　　处：《兰州理工大学学报》2010年第3期81-85,共5页Journal of Lanzhou University of Technology

摘　　要：合成四类不同含氮官能团及不同阴离子的Brфnsted酸离子液体,用核磁共振(NMR)、红外光谱(IR)、热重分析(TG/DTA)等表征方法对其进行表征.在此基础上,研究三油酸甘油酯和甲醇的酯交换反应,考查离子液体种类对酯交换反应的催化能力.结果表明:离子液体催化剂的活性与其含氮官能团结构和阴离子酸强度以及酸量有关.通过阴阳离子共同作用,将阴离子为HSO4-和H2PO4-的吡啶类和甲基吡啶类离子液体结合使用,既能使反应快速进行又可以得到较高的甲酯收率.Four kinds of Brфnsted-acidic ionic liquids with nitrogen-laden functional groups and different anions,and were synthesized and characterized with nuclear magnetic resonance（NMR）,infrared spectrum（IR） and thermogravimetric analysis（TG/DTA）.On this basis,the trans-esterification of triolein and methanol was studied and the catalytic activities of ionic liquids in trans-esterification were investigated.The results showed that their catalytic activities were related with the structures of nitrogen-laden functional groups,anionic acid strength and acid volume.Pyridine and methyl pyridine ionic liquids,whose anions were HSO4^- and H2PO4^-,were used jointly to accelerate the reaction and get a higher yield of methylester under the coaction of anions and cations.

关 键 词：生物柴油 离子液体 催化 酯交换 

分 类 号：TQ426[化学工程] TQ645