SO_3H-功能化季铵盐离子液体催化酯交换制备生物柴油  

Synthesis of Biodiesel Catalyzed by SO_3H-functionalized Quaternary Ammonium Ionic Liquids

作　　者：左霜[1] 林金清[1] 孙亚飞[1] 方国阳[1] 

机构地区：[1]华侨大学材料科学与工程学院,福建厦门361021

出　　处：《过程工程学报》2011年第1期153-157,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20776057)

摘　　要：采用两步合成法制备了4种SO3H-功能化季铵盐离子液体,红外与核磁共振光谱表征结果表明,其结构符合理论结构特点.热稳定性分析表明,其分解温度都在200℃以上,均可作为制备生物柴油的催化剂.将这4种离子液体用于催化制备生物柴油,其催化活性主要与其阴离子的结构有关,[n-But3N(CH2)3SO3H][CH3SO3]的催化活性最好.甲醇:三油酸甘油酯摩尔比为12:1、催化剂用量7%(ω)、在65℃下反应24h时,油酸甲酯产率最高(89.65%).催化剂重复使用性能良好.4 kinds of SO3H-functionalized quaternary ammonium ionic liquid were prepared by two-step method.Their IR and NMR spectra showed that their structures were in accordance with their theoretical structure.Their decomposition temperatures shown by TG were higher than 200℃,so they were enough stable as the catalyst in synthesis of biodiesel.Biodiesel was synthesized with triolein and methanol catalyzed by the 4 kinds of ionic liquid prepared.Their catalytic activity was related to their anion structure,and [n-But3N（CH2）3SO3H][CH3SO3] showed the best catalytic activity.The effects of reaction time,molar ratio of methanol to triolein and catalyst amount on the yield of fatty aid methyl ester were investigated when [n-But3N（CH2）3SO3H][CH3SO3] was selected as the catalyst of transesterification reaction.Under the conditions of molar ratio of methanol to triolein at 12：1,mass fraction of ionic liquid 7%（ω）,reaction temperature 65℃ and reaction time 24 h,the yield of fatty aid methyl ester reached 89.65%,and the ionic liquid was stable during the reaction and could be reused.

关 键 词：生物柴油 功能化 [n-But3N(CH2)3SO3H][CH3SO3] 离子液体 酯交换 

分 类 号：TE667[石油与天然气工程—油气加工工程]