微波辐射法制备聚乙烯吡咯烷酮/Pt胶体催化间氯硝基苯选择加氢  

Selective hydrogenation of m-chloronitrobenzene over polyvinylpyrrolidone / Pt colloids prepared by microwave radiation

作　　者：李锋[1,2] 曹博[1] 马睿[1] 梁晋榕 宋华[1,2] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]东北石油大学石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《能源化工》2015年第6期60-63,共4页Energy Chemical Industry

基　　金：黑龙江省教育厅面上项目(12541060);国家大学生创新创业训练项目(2012102200009);东北石油大学青年科学基金(2013NQ112)

摘　　要：以聚乙烯吡咯烷酮(PVP)/乙二醇/H2Pt Cl6溶液为反应体系,采用微波辐射法制备PVP稳定的PVP/Pt胶体,对生成的胶体粒子进行TEM表征,利用UV-Vis检测微波反应体系中Pt粒子的形成过程,以间氯硝基苯(m-CNB)选择加氢制间氯苯胺(m-CAN)反应为探针考察微波反应体系构成及微波加热条件对PVP/Pt胶体催化性能的影响。结果表明:该方法制备的PVP/Pt胶体粒子分布均匀,平均粒径1.98 nm。在常压、303 K下m-CNB加氢反应60 min,催化转换频率(TOF)达到0.205 s-1,相应的m-CNB转化率和m-CAN选择性分别为94.4%和92.1%。Poly（ N-vinyl-2-pyrrolidone）-stabilized platinum（ PVP / Pt） colloids are prepared by microwave radiation using PVP /ethylene glycol/H_2 PtCl_6solution as reaction system,and the prepared colloids particles are characterized by TEM. The formation process of Pt particles in microwave radiation reaction system is monitored by UV-Vis. The effects of the reaction system composition and microwave heating conditions on hydrogenation properties over PVP / Pt colloids are investigated using m-chloronitrobenzene（ mCNB） hydrogenation to m-chloroaniline（ m-CAN） as probe. TEM result shows that Pt particles（ about 1. 98 nm） is uniform with high dispersion in PVP / Pt colloids. After 60 min reaction at normal pressure and 303 K,the catalytic turnover frequency（ TOF） for m-CNB hydrogenation over PVP / Pt colloids is 0. 205 s^（-1）,and the conversion of m-CNB and selectivity to m-CAN is 94. 4% and 92. 1%,respectively.

关 键 词：微波加热 均相催化 聚乙烯吡咯烷酮 胶体催化剂 间氯硝基苯 选择加氢 

分 类 号：O643.36[理学—物理化学] O621.251[理学—化学]