载体对镍系催化剂催化对硝基苯酚加氢制对氨基苯酚的影响  

Influence of supports on catalytic activity of nickel catalysts for hydrogenation of p-nitrophenol to p-aminophenol

作　　者：陆惠红[1] 刘于民[1] 漆琳[1] 殷恒波[1] 

机构地区：[1]江苏大学化学化工学院,江苏镇江212013

出　　处：《现代化工》2008年第11期55-57,59,共4页Modern Chemical Industry

基　　金：江苏省新产品基金(200470)资助;镇江市产学研基金(200473)资助

摘　　要：采用浸渍法制备了Ni/Al2O3、Ni/TiO2、Ni/活性炭和Ni/硅藻土等一系列镍系催化剂,研究了其催化对硝基苯酚加氢制备对氨基苯酚的活性。负载型镍系催化剂具有单一的对氨基苯酚选择性。不同载体负载的催化剂上对硝基苯酚的转化率顺序为:Ni/活性炭>Ni/硅藻土>Ni/TiO2>Ni/Al2O3。高比表面积以及金属镍在活性炭上的良好分散性使得Ni/活性炭催化活性最高;NiO与硅藻土间弱相互作用,有助于提高活性;而NiO与Al2O3之间存在相互作用抑制了还原后金属镍的催化加氢活性。The catalytic activities of Ni/diatomite, Ni/activated carbon, Ni/TiO2 and Ni/Al2O3 for hydrogenation of p-nitrophenol to p-aminophenol are studied. The supported Ni catalysts have high selectivity toward formation of p-aminophenol. The catalytic activity for hydrogenation of p-nitrophenol to p-aminophenol of the supported Ni catalysts follows the order： Ni/activated carbon 〉 Ni/diatomite 〉 Ni/TiO2 〉 Ni//Al2O3. The high activity of Ni/activated carbon can be ascribed to its high specific surface area and high dispersion extent of Ni on activated carbon. The weak interaction between Ni and diatomite is of benefit to the activity of Ni/diatomite, however, the strong interaction between Ni and Al2O3 restricts the activity of Ni/Al2O3.

关 键 词：对氨基苯酚 对硝基苯酚 镍 加氢 

分 类 号：TQ426.65[化学工程]