双核酸性离子液体[DABCO-PS][HSO_4]催化蓖麻油制备生物柴油研究  

Synthesis of biodiesel from castor oil catalyzed by dual-core acidic ionic liquid [DABCO-PS][HSO_4]

作　　者：苏玉[1] 黄国林[1] 吕婷婷[1] 王乐乐[1] 

机构地区：[1]东华理工大学化学生物与材料科学学院,南昌330013

出　　处：《中国油脂》2016年第10期72-76,共5页China Oils and Fats

基　　金：江西省自然科学基金(20132BAB203019);长江学者和创新团队发展计划基金(IRT13054)

摘　　要：研究合成了双核酸性离子液体[DABCO-PS][HSO_4],并将其用于催化蓖麻油酯交换制备生物柴油。优化后得离子液体前体[DABCO-PS]合成最佳条件为n(1,3-丙烷磺酸内酯)∶n(三乙烯二胺)=2∶1、反应温度60℃、反应时间3 h,在此条件下离子液体前体收率达93.4%。采用红外光谱、核磁共振和质谱对[DABCO-PS][HSO_4]进行表征,确定产物为目标离子液体。优化得到[DABCO-PS][HSO_4]催化蓖麻油制备生物柴油的最佳条件为n(甲醇)∶n(蓖麻油)=12∶1、离子液体用量4%(以蓖麻油质量计)、反应温度50℃、反应时间1 h,在此条件下生物柴油收率达90%。采用气相色谱确定生物柴油主要成分是棕榈酸甲酯、亚油酸甲酯、油酸甲酯、亚麻酸甲酯、硬脂酸甲酯和蓖麻油酸甲酯,且脂肪酸甲酯占生物柴油的90%以上。Dual - core acidic ionic liquid [ DABCO - PS] [ HSO4 ] was synthesized, and it was used to catalyze castor oil to prepare biodiesel through transesterification. The optimal synthesis conditions of ionic liquid precursor [ DABCO -PSI were obtained as follows： molar ratio of 1,3 -propane sultone to triethylene diamine 2： 1, reaction temperature 60 ℃ and reaction time 3 h. Under these conditions, the yield of [ DABCO - PS ] reached 93.4%. The [ DABCO - PS] [ HSO4 ] was characterized by FTIR , NMR and MS to be confirmed as the target ionic liquid. The optimal synthesis conditions of biodiesel from castor oil catalyzed by [ DABCO - PS] [ HSO4 ] were obtained as follows ： molar ratio of methanol to castor oil 12：1 ,dosage of ionic liquid 4% （based on the mass of castor oil）, reaction temperature 50℃ and reaction time l h. Under these conditions, the yield of biodiesel reached 90%. The main components of the biodiesel were determined by gas chromatography as methyl palmitate, methyl linoleate, methyl oleate, methyl linolenate, methyl stearate and methyl ricinoleate, and fatty acid methyl ester accouted for above 90% of the biodiesel.

关 键 词：双核酸性离子液体 酯交换 生物柴油 蓖麻油 

分 类 号：TE667[石油与天然气工程—油气加工工程]