非均相Schiff碱铬(III)配合物催化环己烯环氧化性能的研究  

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

作　　者：王晓丽[1] 吴功德[1] 王芳[2] 魏伟[3] 孙予罕[3] 

机构地区：[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

出　　处：《催化学报》2011年第12期1812-1821,共10页

基　　金：国家自然科学基金(21003073);江苏省青蓝工程基金;南京工程学院创新基金(CKJ2010012)~~

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.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.

关 键 词：非均相 氨基酸 SCHIFF碱 环己烯 环氧化 

分 类 号：TQ203.2[化学工程—有机化工]