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- W2000794573 abstract "Abstract Epoxidation of allyl acetate was carried out over MoO 3 /α-Al 2 O 3 using tert -butyl hydroperoxide (TBHP) as an oxidizing reagent. Only a small amount of glycidyl acetate was formed. The low yield was due to the cleavage of an epoxy-ring of glycidyl acetate with the acid sites of MoO 3 /α-Al 2 O 3 . The acid sites were neutralized with amines to keep the glycidyl acetate intact during the reaction. Pyridine derivatives greatly improved epoxide selectivity, but addition of aliphatic amines and 2,2′-bipyridine only resulted in retardation of the reaction. The volcano-type plot of Hammett’s p-substituent constant versus epoxide selectivity indicated that pyridine derivative also exerts a ligand effect, and non-substituted pyridine was found to the most suitable additive. The optimum amount of loading of MoO 3 was 2 wt.%; at this value, MoO 3 was highly dispersed on α-Al 2 O 3 . The optimum molar ratio of pyridine to MoO 3 for epoxide production was 2/3." @default.
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- W2000794573 date "2004-10-01" @default.
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- W2000794573 title "Epoxidation of allyl acetate with tert-butyl hydroperoxide over MoO3/α-Al2O3 promoted by pyridine derivatives" @default.
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- W2000794573 doi "https://doi.org/10.1016/j.apcata.2004.07.008" @default.
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