NDLI: Highly selective synthesis of trans-stilbene oxide over mesoporous Mn-MCM-41 and Zr–Mn-MCM-41 molecular sieves

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Highly selective synthesis of trans-stilbene oxide over mesoporous Mn-MCM-41 and Zr–Mn-MCM-41 molecular sieves

Content Provider	Semantic Scholar
Author	Selvaraj, Manickam Seshadri, Kalkunte S. Pandurangan, Arumugam
Copyright Year	2005
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.
Starting Page	261
Ending Page	268
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1016/j.micromeso.2004.11.009
Volume Number	79
Alternate Webpage(s)	http://web.yonsei.ac.kr/hg/MMM-2005-2.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.micromeso.2004.11.009
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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