苯及苯磺酸基官能化的中孔分子筛的合成及催化应用

近年来 ,通过对介孔分子筛 (如 MCM,HMS,MSU-X)结构及组成的化学“裁剪”,制备具有特定结构和表面性质的催化材料成为该领域的研究热点之一 1～ 5] .许多文献报道了 MCM-4 1的有机官能化中孔材料的制备技术 5～ 8] ,并将其应用于有机合成反应 ,取得了较好的结果 7,8] .其中 MSU-X介孔分子筛结构具有三维排列“Worm-like”孔道特征 ,有利于物料传输 ;相对于 MCM-4 1分子筛在合成方面具有以中性表面活性剂作模板剂且模板剂容易去除等诸多优点9] .本文采用非离子表面活性剂 C11— 15H2 3— 31(CH2 CH2 O) 9H(AEO9)为模板剂 ,…

Synthesis of Phenyl and Phenylsulphonic Acid Functionalized-MSU and Their Catalytic Performance

A series of phenyl functionalized MSU mesoporous molecular sieves were synthesized under neutral condition in the presence of biodegradable non ionic polyethylene oxide(AEO 9). By subsequent sulphonation of the phenyl rings attached to the silica framework, the phenylsulphonic acid functionalized MSU derivatives could be obtained. Their structure and property of the organo modified mesoporous molecular sieves were studied by means of XRD, FT IR, TEM, HRTEM, 13 C MAS NMR, 29 Si MAS NMR, N 2 adsorption/desorption and probe reaction techniques. The results showed that the so produced organo modified mesoporous molecular sieves featured bimodal pore size distribution and the pore channel was similar to those in the \{MSU(worm like)\}. The organo modified mesoporous molecular sieves containing phenylsulphonic acid active sites, used as solid acid catalyst, showed a much higher catalytic activity for the formation of 2,2 pentamethylene 1,3 dioxolane(cyclic ketal) from ethylene glycol and cyclohexanone.WT5HZ]