催化学报

• 研究论文 • 上一篇    下一篇

镍(II)配合物官能化的MCM-41催化分子氧环氧化苯乙烯

杨刚, 陈星, 王小丽, 邢卫红, 徐南平   

  1. 南京工业大学材料化学工程国家重点实验室, 江苏南京 210009
  • 收稿日期:2013-01-23 修回日期:2013-03-12 出版日期:2013-07-16 发布日期:2013-07-16
  • 通讯作者: 杨刚
  • 基金资助:

    国家自然科学基金(20576052).

Nickel(II) complex anchored on MCM-41 for the epoxidation of styrene by oxygen

YANG Gang, CHEN Xing, WANG Xiaoli, XING Weihong, XU Nanping   

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China
  • Received:2013-01-23 Revised:2013-03-12 Online:2013-07-16 Published:2013-07-16
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (20576052).

摘要: 制备了镍(II)席夫碱配合物官能化的MCM-41多相催化剂MCM-41-Ni.利用X射线粉末衍射、氮气物理吸附脱附、红外光谱、热重、电感耦合等离子体原子发射光谱、元素分析和透射电镜等方法对催化剂进行了表征.以氧气为氧化剂,MCM-41-Ni在催化环氧化苯乙烯的反应中表现出较高的催化活性;苯乙烯的转化率为95.2%,环氧苯乙烷的选择性为66.7%.系统地研究了反应温度、催化剂用量、溶剂以及反应时间对反应性能的影响.催化剂经过4次循环仍然表现出较好的稳定性和催化活性.

关键词: 镍席夫碱配合物, MCM-41分子筛, 苯乙烯环氧化, 分子氧

Abstract: A heterogeneous catalyst, MCM-41-Ni, was synthesized by anchoring a nickel(II) Schiff base complex onto amino-modified MCM-41. The catalyst was characterized by small angle X-ray diffraction, nitrogen adsorption, infrared spectroscopy, thermal gravimetric analysis, inductively coupled plasma and C, H, N elemental analysis, and transmission electron microscopy. MCM-41-Ni showed excellent catalytic activity for the epoxidation of styrene with O2 as oxidant with high styrene conversion (95.2%) and epoxide selectivity (66.7%). The influence of reaction temperature, catalyst amount, solvent, and reaction time was studied. MCM-41-Ni showed good recyclability and can be reused four times.

Key words: Nickel Schiff base complex, MCM-41 molecular sieve, Styrene epoxidation, Molecular oxygen