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Title of article :
A cascade aerobic epoxidation of alkenes over Au/CeO2 and Ti-mesoporous material by “in situ” formed peroxides
Author/Authors :
Carmela Aprile، نويسنده , , Avelino Corma، نويسنده , , Marcelo E. Domine، نويسنده , , Hermenegildo Garcia، نويسنده , , Chris Mitchell، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
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Abstract :
The one-pot epoxidation of alkenes with O2 is performed with nano-particulated Au/CeO2 and Ti-MCM-41 silylated materials in the presence of a hydrocarbon and azobis-iso-butyronitrile (AIBN) as a promoter. This initiator is able to form organo-gold species that promote the formation of hydrocarbon (3-methyl-pentane, ethylbenzene, or cumene) hydroperoxides which in the presence of Ti-mesoporous material epoxidize the alkene in good yields. The epoxidation reaction of 1-octene with molecular oxygen image at 90 °C over AIBN–Au/CeO2 + Ti-MCM-41-silylated catalytic system results in alkene conversions close to 9% (≈40% of the maximum conversion attainable) with epoxide selectivity around 90% when working with cumene as a sacrificial hydrocarbon.
Keywords :
6-Dimethyldibenzothiophene , Hydrogenated intermediates , Mechanism , Inhibition by H2S , Kinetics , Effect of piperidine , Sulfided NiMo/?-Al2O3 , 4 , Hydrodesulfurization , HDS , Dibenzothiophene
Journal title :
Journal of Catalysis
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