Pickering乳液催化非均相羟醛缩合反应研究  

Heterogeneous aldol condensation catalyzed with Pickering emulsion

作　　者：陈余 郑晓妍 赵辉[1] 王二强 李杰[1,4] 李春山 CHEN Yu;ZHENG Xiaoyan;ZHAO Hui;WANG Erqiang;LI Jie;LI Chunshan(Beijing Key Laboratory of Ionic Liquids Clean Process,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 101408,China;College of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516003,Guangdong,China)

机构地区：[1]中国科学院过程工程研究所,离子液体清洁过程北京市重点实验室,北京100190 [2]中国科学院大学化工学院,北京101408 [3]北京石油化工学院新材料与化工学院,北京102617 [4]先进能源科学与技术广东省实验室,广东惠州516003

出　　处：《化工学报》2023年第1期449-458,共10页CIESC Journal

基　　金：国家杰出青年自然科学基金项目(22025803);国家自然科学基金青年科学基金项目(22108278);河北省自然科学基金项目(B2021103012)。

摘　　要：近年来,煤基合成甲基丙烯酸甲酯(MMA)工艺获得广泛关注,但甲醛、丙醛羟醛缩合反应存在反应过程不连续、分离回收过程复杂等瓶颈问题。本文以表面改性的二氧化硅(SiO_(2))纳米球为乳化剂,乳化剂颗粒交联进一步“加固”,在液滴周围形成了致密SiO_(2)壳层,构筑了强化型油包水(W/O)Pickering乳液。该Pickering乳液催化体系不仅实现了催化剂的“固载”和羟醛缩合温和反应过程的非均相转化,也为其他均相催化反应体系提供了机遇。In recent years,the coal-based synthesis of methyl methacrylate(MMA) process has received extensive attention.However,the aldol condensation reaction of formaldehyde and propionaldehyde has bottleneck problems such as discontinuous reaction process and complicated separation and recovery process.A reinforced water-in-oil(W/O) Pickering emulsion was constructed with surface-modified silica(SiO_(2)) nanospheres used as stabilizers and the emulsifier particles were further “reinforced” by cross-linking to form a dense SiO_(2)shell layer around the droplets.This Pickering emulsion system not only achieves the “solid loading” of the catalyst and the heterogeneous mild conversion of the aldol condensation reaction process,but also provides opportunities for other homogeneous catalytic reaction systems.

关 键 词：乳液 多相反应 催化 甲基丙烯醛 多孔微球 

分 类 号：TQ032.4[化学工程] O643.32[理学—物理化学]