介孔分子筛KF-SBA-15的制备及其催化Knoevenagel反应  

Preparation of KF-SBA-15 and its Catalytic Knoevenagel Reaction

作　　者：李琳琳 龚维 付海 裴响林 陈卓 尹晓刚 Li Linlin;Gong Wei;Fu Hai;Pei Xianglin;Chen Zhuo;Yin Xiaogang(School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550001,China)

机构地区：[1]贵州师范大学化学与材料科学学院,贵州省功能材料化学重点实验室,贵阳550001

出　　处：《化学工业与工程》2020年第3期17-22,共6页Chemical Industry and Engineering

基　　金：贵州省科技创新人才团队建设项目(黔科合人才团队[2014]4006号)。

摘　　要：以P123、正硅酸四乙酯、KF为原料制备了介孔分子筛SBA-15及KF-SBA-15,使用XRD、IR、BET和TG等确证结构。在以苯甲醛和丙二腈为探针的Knoevenagel缩合反应中考察其催化性能,单因素实验法优化反应条件,探究催化剂类型及用量、溶剂、原料物质的量之比等对产率的影响,筛选出最适宜条件为:n(苯甲醛)∶n(丙二腈)为1∶1,催化剂用量为醛的10%(摩尔分数,下同),室温反应30 min产率可达93. 6%。Mesoporous molecular sieves SBA-15 and KF-SBA-15,were prepared by using P123 tetraethyl orthosilicate and KF as raw materials,and the structures were confirmed by IR,BET,TG and XRD. The Knoevenagel condensation reaction of benzaldehyde and malononitrile was catalyzed by mesoporous molecular sieve KF-SBA-15. The effects of catalyst dosage,solvent,molar ratio of raw materials and catalyst type on the yield were investigated. The optimum conditions were as follows: the ratio of aromatic aldehyde to malononitrile was 1 ∶1,the amount of catalyst was 10%( mole fraction) of benzaldehyde. The reaction was carried out for 30 min at room temperature and the yields could be 93. 6%.

关 键 词：KNOEVENAGEL反应 SBA-15 KF 负载型催化剂 

分 类 号：TQ207[化学工程—有机化工]