英语翻译外文期刊数据库 【正题名】:Metal ion-planted MCM-41 - 2.Catalytic epoxidation of stilbene and its derivatives with tert-butyl hydroperoxide on Mn-MCM-41 【作者】:Yonemitsu M.; Iwamoto M.; Tanaka Y.【作者单位】:Hokkaid

英语翻译外文期刊数据库 【正题名】:Metal ion-planted MCM-41 - 2.Catalytic epoxidation of stilbene and its derivatives with tert-butyl hydroperoxide on Mn-MCM-41 【作者】:Yonemitsu M.; Iwamoto M.; Tanaka Y.【作者单位】:Hokkaid
英语翻译
外文期刊数据库
【正题名】:Metal ion-planted MCM-41 - 2.Catalytic epoxidation of stilbene and its derivatives with tert-butyl hydroperoxide on Mn-MCM-41
【作者】:Yonemitsu M.; Iwamoto M.; Tanaka Y.
【作者单位】:Hokkaido Univ,Catalysis Res Ctr,Sapporo,Hokkaido 060,Japan.
【刊名】:Journal of Catalysis
【年卷期】:Vol.178,No.1,1998
【出版年】:1998
【ISSN】:0021-9517
【页码】:p.207-213
【分类号】:O63; TQ032; O64
【关键词】:Mesoporous molecular-sieve; Electron-spin-resonance; Siliceous mcm-41; Echo modulation; Liquid-phase; Oxidation; Stability; Silicate; Peroxide; Olefins
【正文语种】:Eng
【文摘】:Manganese ion-planted MCM-41 (Mn-MCM-41) prepared by the template ion-exchange (TIE) method has been found to be active for catalytic epoxidation of aromatic olefins.The activity of Mn-MCM-41 was the greatest among those of Mn/MCM-41,Mn/SiO2,Mn/Al2O3,which were prepared by a conventional impregnation method,and Mn-ZSM-5 prepared by an ion-exchange method.The proper reaction conditions have first been determined for trans-stilbene as the substrate.The most effective oxidant was tert-butyl hydroperoxide (TBHP) at 328-348 K among H2O2,PhIO,TBHP,and O-2.The highest yield of 93% of trans-stilbene oxide was obtained by using a mixed solvent of acetonitrile and dimethylformamide of 9:1 (v/v) at 328 K.Mn-MCM-41 could be used repeatedly for the reaction without decrease in the catalytic activity.The epoxidation of trans and cis isomers of various aromatic olefins has then been studied.The oxidation of olefins having bulky substituents such as 4-tert-butylphenyl and 2-naphthyl could proceed in the mesopores of Mn-MCM-41.The epoxidation of trans isomers was easier than that of cis isomers.The olefins with cis configuration all gave the corresponding trans oxides with small amounts of trans olefins as by-products.A radical mechanism has been suggested for the oxidation on the basis of the product distributions.(C) 1998 Academic Press.[References:42]
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英语翻译外文期刊数据库 【正题名】:Metal ion-planted MCM-41 - 2.Catalytic epoxidation of stilbene and its derivatives with tert-butyl hydroperoxide on Mn-MCM-41 【作者】:Yonemitsu M.; Iwamoto M.; Tanaka Y.【作者单位】:Hokkaid
【正题名】金属离子种植MCM - 41的- 2 .催化环氧化苯乙烯及其衍生物与对叔丁基过氧化氢锰- MCM - 41的
【作者】Yonemitsu先生;岩本先生;田中元
【作者单位】北海道大学,催化杂志的点击率,北海道札幌060 ,日本.
【刊名】催化学报
【年卷期】vol.178, No.1 1998年
【出版年】: 1998
【ISSN】: 0021-9517
【页码】: p. 207-213
【分类号】: O63; TQ032; O64
【关键词】Mesoporous分子筛子; 电子转动共鸣; 硅质的mcm41; 回声模块化; 液体阶段; 氧化作用; 稳定; 硅酸盐; 过氧化物; 烯烃
【正文语种】英国
【文摘】锰准备的发现离子被种植的MCM-41模板离子交换(领带)方法(MnMCM41)活跃的为芳香烯烃的催化作用的环氧化作用. MnMCM的活动41在那些是最伟大的Mn/MCM-41之中, Mn/SiO2, Mn/Al2O3,用一个常规注入方法准备,并且MnZSM 5用一个离子交换方法准备了. 适当的反应条件为trans芪首先被确定了作为基体.最有效的氧化剂是tert丁基氢过氧化物(TBHP)在328-348 K在H2O2、PhIO、TBHP和O-2之中. 最高的出产量93% trans芪氧化物获得了通过使用乙腈一种混杂的溶剂,并且二甲替甲酰胺9:1 (v/v)在328 K. MnMCM41可能为反应一再使用,不用在催化作用的减退. trans和各种各样的芳香烯烃同边异构体的环氧化作用然后被学习了.有的烯烃的氧化作用庞大的代替者例如4-tert-butylphenyl和2萘基在MnMCM41 mesopores能进行.转同质异能素的环氧化作用比那容易同边异构体. 与同边配置的烯烃全部给了与少量的对应的trans氧化物trans烯烃作为副产物.一个根本机制为氧化作用被建议了根据产品分发. (c) 1998学术出版社. [参考： 42]