12-钨磷酸在AlSBA-15上的固定化及其乙酰化催化活性(英文)

查看全文 作　　者：[1,2]S.REVATHI;M.Esther Leena [1]PREETHI;[1]D.MANIKANDAN;[1]D.DIVAKAR;A.Valentine [1]RUPA;[1]T.SIVAKUMAR

机构地区：[1]Department of Chemical Engineering,A.C.College of Technology,Anna University;[2]Graduate,College of Engineering,Anna University

出　　处：《催化学报》索引2008年第29卷第12期,共9页

摘　　要：12-Tungstophosphoric heteropoly acid(TPA) with a Keggin structure was introduced into Al-incorporated mesoporous molecular sieves(AlSBA-15) by the incipient wetness method.The materials were characterized by X-ray diffraction,nitrogen adsorption,scanning electron microscopy,UV-Vis diffuse reflectance and Raman spectroscopy,which confirmed the Keggin and mesopore structure.Its catalytic activity was evaluated under solvent-free conditions in the liquid phase at 333-383 K for the propionylation of anisole with propionic anhydride.The catalysts used were AlSBA-15,10%,20%,and 40% TPA/AlSBA-15,and 20% TPA/MCM-48.In the propionylation of anisole with propionic anhydride,the substitution occurred predominantly at the para position.The 20% TPA/AlSBA-15 catalyst gave a total product yield of 48% with 98% selectivity towards 4-methoxypropiophenone.The regenerability of the catalyst was also studied and was found to be excellent. 关键词：AISBA-15 接触反应活性乙酰化作用

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12-钨磷酸在AlSBA-15上的固定化及其乙酰化催化活性(英文)

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