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- W1976827352 abstract "Abstract trans -Stilbene oxide have been synthesized under liquid phase reaction conditions using trans -stilbene in the presence of different oxidants and different solvents over synthesized and characterized Zr–Mn-MCM-41 and Mn-MCM-41 as catalysts. On increasing the Si/(Zr + Mn) ratios of Zr–Mn-MCM-41 and Si/Mn ratios of Mn-MCM-41 catalysts from 49 to 327 and 15 to 102, respectively, the conversion of trans -stilbene, yield and selectivity of trans -stilbene oxide decreased. This may be due to the number of Lewis acid sites in Zr–Mn-MCM-41 and Mn-MCM-41 are found to decrease almost linearly with increasing ratios of Si/(Zr + Mn) and Si/Mn, respectively. Both the Zr–Mn-MCM-41(49) and Mn-MCM-41(31) possesses stronger affinity with trans -stilbene and TBHP, but, the conversion of trans -stilbene, yield and selectivity of trans-stilbene oxide decreased in only recyclable Mn-MCM-41. This may be due to decreasing the catalytic activity on the surface of catalysts. In the context, the Si/(Zr + Mn) ratio of 49 is found to be more suitable for the epoxidation of trans -stilbene to highly selective synthesis of trans -stilbene oxide. Thus the yield (76.3%) and selectivity of trans -stilbene oxide (84.58%) are higher in Zr–Mn-MCM-41(49) than that in other Zr–Mn-MCM-41 and Mn-MCM-41 catalysts." @default.
- W1976827352 created "2016-06-24" @default.
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- W1976827352 date "2005-04-01" @default.
- W1976827352 modified "2023-09-23" @default.
- W1976827352 title "Highly selective synthesis of trans-stilbene oxide over mesoporous Mn-MCM-41 and Zr–Mn-MCM-41 molecular sieves" @default.
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- W1976827352 doi "https://doi.org/10.1016/j.micromeso.2004.11.009" @default.
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