氨基酸添加剂对Ir/γ-Al_2O_3催化对氯硝基苯选择加氢的影响  

Selective Hydrogenation of p-Chloronitrobenzene over Ir/γ-Al_2O_3 Catalyst Modified by Amino Acids

作　　者：许琼[1] 许磊[1] 张田雷[1] 王睿[1] 王志银[1] 

机构地区：[1]陕西理工学院化学与环境科学学院,陕西汉中723001

出　　处：《广州化工》2015年第19期79-81,共3页GuangZhou Chemical Industry

基　　金：陕西省教育厅科研项目(12JK0625);陕西理工学院科研计划资助项目(SLGQD13(2)-3)

摘　　要：采用浸渍法制备了贵金属铱催化剂,用于对-氯硝基苯(p-CNB)催化加氢反应,考察了温度、氢压和添加氨基酸对催化反应的影响。研究表明,添加L-Lysine(赖氨酸)时,催化剂的活性和目标产物(对-氯苯胺,p-CAN)的选择性均显著提高,副反应完全被抑制。L-Lysine对Ir/γ-Al2O3贵金属催化剂性能显著的促进作用,可能是由于L-Lysine与催化剂金属活性中心的配位,产生了强烈的协同效应,从而极大的增强了催化剂的催化性能。A iridium noble metal catalyst was prepared with a isopropylalcohol solution of H2 IrCl6 in impregnatingγ-Al2 O3. The effect of temperature, pressure of hydrogen and amino acids additive on the hydrogenation of p -chloronitrobenzene （ p-CNB ） over Ir/γ-Al2 O3 was investigated. The addition of L-lysine remarkably improved the catalytic activity of Ir/γ-Al2O3 and the selectivity for p-chloroaniline （p-CAN） at high conversion of p-CNB. The presence of L-lysine greatly enhanced the catalyst activity and completely suppressed the formation of by-products. The promotion effect was attributed to the coordination of L-lysine with the active center of the catalyst.

关 键 词：铱 对-氯硝基苯 修饰剂 L-赖氨酸 选择加氢 

分 类 号：O643[理学—物理化学]