亚氨基二苄在含铁氧化物上催化脱氢制亚氨茋  

Catalytic Dehydrogenation of Iminodibenzyl to Iminostilbene over Oxides-containing Iron

作　　者：尹万坡[1] 李茸[1] 寇蕾[1] 李瀛[1] 马建泰[1] 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000

出　　处：《分子催化》2004年第4期248-252,共5页Journal of Molecular Catalysis(China)

摘　　要：在自制的含铁氧化物催化剂上考察了亚氨基二苄(IDB)合成亚氨艹氐(IS)的催化脱氢反应.该反应在水蒸气气氛中进行,反应温度500℃～560℃,水蒸气与IDB的摩尔数之比为200～300.在此条件下,当亚氨基二苄的转化率达到90.4%时,生成亚氨艹氐的选择性可达94.9%,超越了同类文献报道的水平.反应过程中水蒸气起了重要作用,多相反应(催化)和均相反应(非催化)对该催化过程都有贡献.通过TG-DTA和XRD测试,对催化剂的形成过程和晶相变化进行了讨论.The catalytic dehydrogenation of iminodibenzyl (IDB) to iminostilbene (IS) has been investigated over oxides-containing iron catalysts in the presence of steam. The reaction was performed at 500~600 ℃ and steam/iminodibenzyl ratios of 200~300 mol/mol. Under the conditions used selectivities to iminostilbene up to 94.9 at 90.4% iminodibenzyl conversion were achieved, much batter than those similar reports. The steam play an important role in the reaction, both heterogeneous (catalytic) and homogeneous (non-catalytic) contributed to the reaction. By characterizing the catalysts by the means of powder X-ray diffraction (XRD) and thermoanalytic measurements (TG-DAT), the process of the catalysts formation and the transformation of crystal configuration were discussed as well.

关 键 词：亚氨基二苄 亚氨芪 脱氢 含铁氧化物 

分 类 号：O643.38[理学—物理化学]