离子液体稳定Pd纳米粒子催化脂肪酸甲酯加氢反应的研究  

Hydrogenation of fatty acid methyl ester with Pd nanoparticles stabilized by ionic liquid

作　　者：郝斌斌 刘思源[1] 刘悦[1] 李红娟[1] 姚琳[1] 刘仕伟[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《化工科技》2016年第5期41-44,共4页Science & Technology in Chemical Industry

基　　金：青岛市应用基础研究计划(14-2-99-jch);泰山学者建设工程专项经费资助项目

摘　　要：合成了对金属纳米粒子具有稳定特性的新型离子液体1-甲基聚氧乙烯醚-3-甲基咪唑氯盐(ILMPEG-750),将其作为稳定剂用于制备Pd纳米粒子催化体系。结果表明ILMPEG-750对Pd纳米粒子具有良好的稳定性,所得纳米粒子平均粒径为2.35nm,且分布均匀。将制得的纳米催化体系用于催化脂肪酸甲酯的加氢反应,在m(脂肪酸甲酯)=2.5g、w(Pd)=0.5%的催化体系10g、n(Pd)∶n(ILMPEG-750)=1∶5、溶剂m(甲苯)=5.0g、反应温度为210℃、反应时间为4h、氢气压力为6MPa的反应条件下,产物羟值为166mgKOH/g和碘值为13mgI2/100g。分离所得纳米催化体系不经处理重复使用6次后,所得产物的羟值和碘值分别为162mgKOH/g和8mgI2/100g。A novel ionic liquid 1-methoxy polyethylene glycol-3-methyl imidazolium chloride（ILMPEG-750）was synthesized and used as the stabilizer to produce the Pd nanoparticles catalytic systems（Pd/ILMPEG-750）.The results showed that the catalytic system Pd/ILMPEG-750 was stable,and the average particle size of Pd nanoparticles with the homogeneous distribution was 2.35 nm.The catalytic system Pd/ILMPEG-750 was used as catalyst for the hydrogenation of fatty acid methyl ester,and the better reaction conditions were obtained as follows：Fatty acid methyl ester 2.5g,the catalytic system [0.5wt%Pd,n（Pd）∶n（ILMPEG-750）1∶5]10g,toluene solvent 5.0g,reaction temperature 210℃,reaction time4 h,and hydrogen pressure 6MPa.Under the above reaction conditions,the hydroxyl value and iodine value of the product fatty alcohol were 166mgKOH/g and 13mgI2/100 g,respectively.Otherwise,the separated catalytic system was reused 6times without obviously decreasing its catalytic performance,and the hydroxyl value and iodine value of the product were 162mgKOH/g and 8mgI2/100 g respectirely.

关 键 词：脂肪酸甲酯 脂肪醇 离子液体 催化 

分 类 号：TQ216[化学工程—有机化工]