化学
催化作用
沸石
介孔材料
衣康酸
蒸馏水
多孔性
酒
氯化物
化学工程
选择性
扩散
有机化学
聚合物
色谱法
共聚物
工程类
物理
热力学
作者
Yan Zhu,Zile Hua,Yueming Song,Wei Wu,Xiaowen Zhou,Jian Zhou,Jianlin Shi
标识
DOI:10.1016/j.jcat.2012.11.034
摘要
Monobutyl itaconate (MBI) are commercially prepared by using freshly distilled acetyl chloride as catalysts, which, however, always results in complicated purification processes due to the usage of water-carrying agents. Here, we report the highly selective production of MBI by using zeolite-based hierarchical porous materials as catalysts in the esterification between itaconic acid and n-butyl alcohol. Two typical hierarchically porous-structured catalysts, namely hierarchical mesoporous zeolites (HMZ) and hierarchical nanozeolite assembly (HNZ), with distinctive meso- or nano-porosities and highly crystallized ZSM-5 framework, were prepared, and both of them exhibited high catalytic activity and reusability in the selective esterification between itaconic acid and n-butyl alcohol. The extraordinarily high selectivity to MBI was achieved and attributed to the decreased diffusion restriction in the meso- or nano-porous network and shortened diffusion path in the zeolite framework or zeolites nanocrystals of HMZ and HNZ, respectively, which prevented further esterification of monoesters into diesters.
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