Catalytic epoxidation of alkenes with 30% H2O2 over Mn2+-exchanged zeolites

Catalytic epoxidation of alkenes with 30% H2O2 over Mn2+-exchanged zeolites
复制标题

催化%20环氧化%20of%20烯烃%20with%2030%%20H2O2%20over%20Mn2+-交换%20沸石

DOI:
10.1016/j.molcata.2010.02.019
复制
发表时间:
2010-05
期刊:
Journal of Molecular Catalysis A: Chemical
影响因子:
--
通讯作者:
周丹
周丹
中科院分区:
其他
文献类型:
--
作者:
周丹

文献摘要

参考文献

被引文献

相似文献

制备了Mn~(2+)交换的Mn~(2+)-Y、Mn~(2+)-β、Mn~(2+)-A和Mn~(2+)-ZSM-5分子筛,并在273 - 298K、NaHCO_3缓冲体系中,对烯烃与H_2O_2(30%H_2O_2)的液相环氧化反应进行了研究。采用XRD、UV-vis、ICP、BET、IR等技术对催化剂的结构进行了表征。Mn-β和Mn-Y对苯乙烯的环氧化反应表现出最好的可循环活性,苯乙烯转化率分别高于96.0和98.5mol%。Mn-β对环己烯和环己烯的催化活性高于Mn-Y,而对α-甲基苯乙烯、肉桂酰氯、茚、环辛烯和α-蒎烯的催化活性低于Mn-Y,这可能与Mn-β和Mn-Y的孔径不同有关。然而,这些催化剂没有显示出任何活性的1-辛烯与H2O2的环氧化反应,可能是由于低的电子密度的直链末端烯烃的双键。
The Mn2+-exchanged zeolites Mn-Y, Mn-beta, Mn-A and Mn-ZSM-5 were prepared and used as heterogeneous catalysts for the liquid phase epoxidation of alkenes with aqueous hydrogen peroxide (30% H2O2) at 273–298K in the NaHCO3buffer system. The structures of catalysts were characterized by powder X-ray diffraction (XRD), UV–vis, ICP, BET and IR techniques. Mn-beta and Mn-Y exhibited the best recyclable activity for the epoxidation of styrene to achieve styrene conversions higher than 96.0 and 98.5mol%, respectively. Mn-beta showed higher activity for cyclohexene and norbornene but lower activity for α-methylstyrene, cinnamyl chloride, indene, cyclooctene and α-pinene than Mn-Y, which could be correlated with the difference of their pore sizes. However, these catalysts did not show any activity for the epoxidation of 1-octene with H2O2, possibly due to low electron density of double bonds of linear terminal alkenes.
DOI: 10.1016/s1387-1811(98)00074-2
发表时间: 1998-05
影响因子: 5.2
作者:
R. Kumar;A. Bhaumik
通讯作者: R. Kumar;A. Bhaumik
DOI: 10.1016/s1387-1811(99)00123-7
发表时间: 1999-12
影响因子: 5.2
作者:
S. Velu;Neepa Shah;T. Jyothi;S. Sivasanker
通讯作者: S. Velu;Neepa Shah;T. Jyothi;S. Sivasanker
DOI: 10.1002/chin.200536229
发表时间: 2005-09
期刊: ChemInform
影响因子: --
作者:
Q. Xia;H.-Q. Ge;Chuping Ye;Zhong-Li Liu;K. Su
通讯作者: Q. Xia;H.-Q. Ge;Chuping Ye;Zhong-Li Liu;K. Su
DOI: 10.1016/j.jcat.2009.01.013
发表时间: 2009-04-01
影响因子: 7.3
作者:
Lin, Kaifeng;Pescarmona, Paolo P.;Jacobs, Pierre A.
通讯作者: Jacobs, Pierre A.
DOI: 10.1021/jp063957i
发表时间: 2006-10
期刊: The journal of physical chemistry. B
影响因子: --
作者:
M. Selvaraj;T. G. Lee
通讯作者: M. Selvaraj;T. G. Lee