催化学报 ›› 2011, Vol. 32 ›› Issue (12): 1812-1821.DOI: 10.1016/S1872-2067(10)60272-0

• 研究论文 • 上一篇    下一篇

非均相 Schiff 碱铬 (III) 配合物催化环己烯环氧化性能的研究

王晓丽1, 吴功德1,*, 王芳2, 魏伟3, 孙予罕3   

  1. 1南京工程学院环境工程系, 江苏南京 211167; 2南京工业大学理学院, 江苏南京 210009; 3中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001
  • 收稿日期:2011-07-19 修回日期:2011-08-24 出版日期:2011-12-21 发布日期:2015-04-23

Preparation of Immobilized Chromium Schiff Base Complexes and Their Catalytic Performance for Cyclohexene Epoxidation

WANG Xiaoli1, WU Gongde1,*, WANG Fang2, WEI Wei3, SUN Yuhan3   

  1. 1Department of Environment and Technology, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China; 2College of Sciences, Nanjing University of Technology, Nanjing 210009, Jiangsu, China; 3State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China
  • Received:2011-07-19 Revised:2011-08-24 Online:2011-12-21 Published:2015-04-23

摘要: 将 3 种典型的氨基酸-水杨醛 Schiff 碱铬 (III) 配合物固载于介孔 MCM-41 上, 制得非均相 Schiff 碱铬配合物, 用傅里叶变换红外光谱、紫外-可见光谱、X 射线固体粉末衍射、N2 吸附和元素分析对其结构进行了表征, 并以 30% H2O2 为氧化剂, 考察该配合物对环己烯环氧化反应的催化性能. 结果表明, 均相配合物非均相化后, 其催化活性明显提高. 在较优的反应条件下, 环己烯转化率可达 52.6%, 环氧环己烷选择性为 73.5%, 且该非均相催化剂重复使用 6 次后, 仍保持较高的催化活性.

关键词: 非均相, 氨基酸, Schiff 碱, 环己烯, 环氧化

Abstract: Three typical amino acid Schiff base chromium(III) complexes immobilized on MCM-41 were prepared and characterized by various physico-chemical methods such as Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray powder diffraction, N2 sorption, and elemental analysis. The obtained immobilized complexes were effective catalysts for the epoxidation of cyclohexene with 30% hydrogen peroxide and they exhibited significantly enhanced catalytic performance compared with their corresponding homogeneous analogues. Under optimal reaction conditions the highest conversion of cyclohexene was 52.6% with 73.5% epoxide selectivity. In addition, the catalytic activity was retained after recycling 6 times.

Key words: immobilized, amino acid, Schiff base complex, cyclohexene, epoxidation