Ti─Si沸石的催化氧化性能　Ⅰ．烯烃的氧化及骨架钛的作用  

Catalytic Oxidation Performance of Ti-Si Zeolites Ⅰ.Oxidation of Alkene and Effect of Lattice Ti

作　　者：夏清华[1] 王公慰[1] 曹国英[1] 郑禄彬[1] 应慕良[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《分子催化》1994年第4期313-319,共7页Journal of Molecular Catalysis(China)

摘　　要：详细研究了Ｔｉ─Ｓｉ沸石在Ｈ_２Ｏ_２存在下对氯丙烯的环氧化、苯乙烯的氧化和环己烯的氧化等反应的催化作用．发现上述三种结构的烯烃其主要定向产物并不一致：氯丙烯氧化产物主要为环氧氯丙烷，苯乙烯氧化主要产物为苯乙醛、环己烯氧化主要产物为环己二酮．说明烯烃氧化的主要定向产物的结构依赖于有机底物的结构，并不全都给出环氧产物．在三个反应中，Ｔｉ─Ｓｉ沸石均表现出显著的催化活性，这可能与沸石骨架中钛的存在有关．发现在氯丙烯环氧化反应中，只有ＴＳ－１及ＴＳ－２表现出环氧化活性．推测沸石骨架位中存在的钛在氧化反应中起重要作用．Catalytic effects of Ti-Si zeolites have been carefully investigated in the following reactions using hydrogen peroxide as the oxidant:epoxidation of allylchloride,oxidation of styrene and cyclohexene.It was observed that the oxidized products were mainly epichlorohydrin,phenylacetaldehyde and cyclohexadiketone, respectively.The results showed that the structure of oriented oxidized products of alkene depends on the structure of organic substrate.As for the epoxidation of allylchloride,only TS-1 and TS-2 in all tested catalysts possessed epoxidizing activity.It was postulated that lattice titanium might play important roles in the oxidation and epoxidation of alkene using aqueous hydrogen peroxide as the oxidant.

关 键 词：烯烃 氧化 氧化剂 钛硅沸石 催化剂 

分 类 号：TQ426.81[化学工程]