PVP-NiB非晶态催化剂的制备和催化苯酚及其衍生物加氢反应性能  

PVP-NiB amorphous catalyst for selective hydrogenation of phenol and its derivatives

作　　者：张勤生[1] 李海峰[1] 高平[2] 王来来[1] 

机构地区：[1]中国科学院兰州化学物理研究所,羰基合成与选择氧化国家重点实验室,甘肃兰州730000 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《催化学报》2014年第11期1793-1799,共7页

基　　金：国家自然科学基金(21174115);甘肃省青年基金(1308RJYA036)~~

摘　　要：以聚乙烯吡咯烷酮(PVP)为稳定剂,采用化学还原法制备了PVP-NiB非晶态催化剂,通过红外光谱、X射线衍射、透射电子显微镜和电感耦合等离子体光谱对催化剂进行了表征.结果表明,PVP不仅能够提高NiB纳米颗粒的分散度,而且对其起到稳定作用;将该催化剂首次应用于苯酚及其衍生物的催化加氢反应,在水相体系中,30°C及氢气压力0.2 MPa时,苯酚的转化率和环己醇的选择性都能够达到99.9%;酚类衍生物加氢反应结果发现,该催化剂有利于环己醇类物质的生成,初步考察了PVP-NiB非晶态催化剂的构效关系.PVP-NiB amorphous catalysts were prepared by the chemical reduction of nickel chloride with sodium borohydride, and characterized by infrared, X-ray diffraction, transmission election mi-croscopy, and inductively coupled plasma. The relationship between the catalytic activity and na-ture of the active sites was discussed. PVP is a protective agent for preparing PVP-stabilized NiB catalysts, which improved the dispersion of the catalyst and stabilized its amorphous structure. The catalysis of phenol and its derivatives was evaluated in the aqueous phase. 99.9%conversion of phenol and 99.9%selectivity to cyclohexanol were obtained at 30 °C and 0.2 MPa H2 after 18 h over PVP-NiB. The generality of the PVP-NiB catalyst for this reaction was demonstrated by the selective hydrogenation of other phenol derivatives, which showed that the PVP-NiB catalyst was selective for the formation of cyclohexanol.

关 键 词：镍 苯酚 催化加氢 非晶态催化剂 

分 类 号：O621.25[理学—有机化学]