01865nas a2200241   4500008004100000022001400041245009700055210006900152260007300221300001200294490000800306520098500314653004401299653001401343653001601357653001601373653002501389653001501414653001801429100002801447700001701475856013101492       2011                        eng d  a0926-860X00aSelective epoxidation of methyl soyate over alumina-supported group VI metal oxide catalysts0 aSelective epoxidation of methyl soyate over aluminasupported gro  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a189-1980 v4013 a<p>Epoxidation of methyl soyate (biodiesel), soybean oil and oleic acid with tert.-butyl hydroperoxide (TBHP) was investigated over gamma-alumina-supported group VI metal oxides (CrOx/Al2O3, MoOx/Al2O3 and WOx/Al2O3) prepared by impregnation method. The studies revealed that 15 wt% MoOx on gamma-Al2O3 was the most active catalyst (conversion &gt;90 mol% under optimized conditions). While MoOx/Al2O3 is selective mainly for epoxidation, the other catalysts are active for epoxidation as well as for decomposition of TBHP. The active species on the catalyst surface were investigated using in situ UV-visible spectroscopy. A linear correlation was observed between epoxidation activity and surface acidity of the catalyst. A new H-1 NMR method was developed to monitor the progress of epoxidation reaction which was found to be superior to gas chromatographic method in estimating the conversion of double bonds of fatty compounds. (C) 2011 Elsevier B.V. All rights reserved.</p>10aAlumina-supported group VI metal oxides10aBiodiesel10aepoxidation10aFatty acids10aH-1 NMR spectroscopy10aMoOx/Al2O310aVegetable oil1 aSatyarthi, Jitendra, K.1 aSrinivas, D.  uhttps://library.ncl.res.in/content/selective-epoxidation-methyl-soyate-over-alumina-supported-group-vi-metal-oxide-catalysts-0