NI-CE-P非晶态合金催化剂用于氯代硝基苯液相加氢制氯代苯胺  

Liquid-Phase Hydrogenation of Chloronitrobenzene to Chloroaniline over Ni-Ce-P Amorphous Alloy Catalyst

作　　者：严新焕[1] 孙军庆[1] 李波[1] 吕翔[1] 孙孟飞[1] 

机构地区：[1]浙江工业大学绿色化学合成技术国家重点实验室培育基地,浙江杭州310032

出　　处：《催化学报》2006年第2期178-182,共5页

基　　金：国家自然科学基金(20276071);浙江省重大自然科学基金(ZE0102)资助项目

摘　　要：采用化学还原法制备了NI-CE-P非晶态合金催化剂,用X射线能谱、X射线衍射、选区电子衍射、透射电子显微镜和差热分析等方法对催化剂的组成、结构、形貌及热稳定性进行了表征,讨论了NI-CE-P非晶态合金催化剂的催化性能和结构的关系,并以氯代硝基苯液相加氢合成氯代苯胺为探针反应考察了所制备催化剂的加氢性能.研究结果表明,在不加脱卤抑制剂的情况下,在110℃下反应时所选4种反应物的转化率均可达99.8%,脱卤率小于1.8%,且NI-CE-P非晶态合金的活性为NI-P非晶态合金催化剂的2倍,表现出较高的加氢性能和抑制脱卤性能.The Ni-Ce-P amorphous alloy catalyst was prepared by the chemical reduction of NiCl2 and CeCl3 with NaH2PO2 in an aqueous solution at 70℃. The composition of the as-prepared Ni-Ce-P catalyst was analyzed by X-ray energy dispersive spectroscopy. Its amorphous structure was confirmed by X-ray diffraction and selected area electron diffraction. Transmission electron microscopy was used to determine its particle size, and the thermal stability of the Ni-Ce-P amorphous alloy was studied by differential thermal analysis. In the liquid-phase hydrogenation of chloronitrobenzene, an important reaction in industrial production, the selectivity for corresponding chloroaniline and the catalytic activity of the as-prepared Ni-Ce-P amorphous alloy catalyst were measured. The Ni-Ce-P catalyst exhibits higher conversion and selectivity than Ni-P and Raney Ni catalysts, mainly owing to the promoting effect of the unique amorphous structure and the interaction between Ni and Ce. The conversion of the four selected chloronitrobenzenes all reaches 99.8 % while the dechlorination of chloroanilines is less than 1.8% in alcohol at 110℃ under 1.0 MPa of hydrogen. that of Ni-P catalyst, and the Ni-Ce-P catalyst shows a good The activity of Ni-Ce-P catalyst is nearly 2 times potential for industrial application.

关 键 词：镍 铈 磷 非晶态合金 氯代硝基苯 催化加氢 氯代苯胺 

分 类 号：O643.32[理学—物理化学] O625.6[理学—化学]