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- W11276326 abstract "Summary The transformation of phenylacetate was carried out over two zeolites: HY (Si/Al = 20) and HZSM5 (Si/Al = 40) at 400°C under atmospheric pressure. The reactivities of the products and intermediates were also studied under the same conditions. On both catalysts the main product was phenol which means that ketene was also formed. HY led mainly to ortho-hydroxyacetophenone while HZSM5 gave both ortho- and para-hydroxyacetophenones in equal amounts. 2-Methylchromone and 4-methylcoumarine were formed on HY only and supposedly resulted from an intramolecular condensation of ortho-acetoxyacetophenone which was not observed among the products. On HZSM5 dehydroacetic acid and 4-acetoxy 6-methyl 2-pyrone were formed presumably through autocondensation of ketene. Para-acetoxyacetophenone was observed on both catalysts. Water had practically no effect on the activity and selectivity of HY while it increased the stability of HZSM5 markedly." @default.
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- W11276326 date "1991-01-01" @default.
- W11276326 modified "2023-09-27" @default.
- W11276326 title "Mechanism of Phenylacetate Transformation on Zeolites" @default.
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- W11276326 doi "https://doi.org/10.1016/s0167-2991(08)61160-x" @default.
- W11276326 hasPublicationYear "1991" @default.
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