01736nas a2200241   4500008004100000022001400041245014000055210006900195260007300264300001200337490000800349520081300357653001201170653003201182653001301214653002701227653001801254100002601272700001801298700002501316700002801341856012501369       2005                        eng d  a1381-116900aEpoxidation of styrene by anhydrous hydrogen peroxide over boehmite and alumina catalysts with continuous removal of the reaction water0 aEpoxidation of styrene by anhydrous hydrogen peroxide over boehm  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a217-2220 v2273 a<p>Boehmite and alumina (obtained from the boehmite by its calcination at different temperatures 300-900degreesC) are active and stable catalysts for the selective epoxidation of styrene by anhydrous H2O2 to styrene oxide with continuous removal of the reaction water. Influence of the catalyst (boehemite) calcination temperature, H2O2/styrene ratio and catalyst loading on the styrene conversion and selectivity for styrene oxide. phenyl acetaldehyde. benzaldehyde and benzoic acid in the epoxidation has been investigated. In the presence of water. the catalyst shows very poor activity and selectivity in the epoxidation. The catalyst also catalyses H2O2 decomposition and hence has optimum loading for obtaining high-styrene conversion in the epoxidation. (C) 2004 Elsevier B.V. All rights reserved.</p>10aAlumina10aanhydrous hydrogen peroxide10aboehmite10aEpoxidation of styrene10aStyrene oxide1 aChoudhary, Vasant, R.1 aPatil, N., S.1 aChaudhari, Nitin, K.1 aBhargava, Suresh, Kumar  uhttps://library.ncl.res.in/content/epoxidation-styrene-anhydrous-hydrogen-peroxide-over-boehmite-and-alumina-catalysts-002101nas a2200253   4500008004100000022001400041245024000055210006900295260009500364300001200459490000800471520100600479653002201485653002701507653002301534653001801557653002901575100002601604700002201630700001801652700001901670700002801689856013001717       2013                        eng d  a0021-951700aEpoxidation of styrene by t-butyl hydroperoxide over gold nanoparticles supported on Yb2O3: effect of gold deposition method, gold loading, and calcination temperature of the catalyst on its surface properties and catalytic performance0 aEpoxidation of styrene by tbutyl hydroperoxide over gold nanopar  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcAPR  a217-2240 v3003 a<p>Surface properties and epoxidation performance of Au/Yb2O3 catalyst are influenced by the method of gold deposition [viz. deposition-precipitation (DP), homogeneous deposition-precipitation (HDP) or impregnation], gold loading (0.9-6.6 wt%), and the catalyst calcination temperature (400-900 degrees C)]. The catalyst showed the best epoxidation performance when it was prepared by the HDP method and calcined at 500 degrees C. The Au/Yb2O3 catalyst even after calcination at 900 degrees C showed good activity and epoxide selectivity. Both Au-0 and Au3+ surface species were found in the catalyst calcined at 800 degrees C, but only Au-0 species were observed at the lower calcination temperatures (&lt;600 degrees C). The selectivity for styrene oxide increased continuously with the reaction temperature (from 75 degrees C to 97 degrees C) and time (1-5 h), indicating that styrene oxide did not undergo secondary reactions under these conditions. (C) 2013 Elsevier Inc. All rights reserved.</p>10aAu/Yb2O3 catalyst10aEpoxidation of styrene10agold nanoparticles10aStyrene oxide10atert-Butyl hydroperoxide1 aChoudhary, Vasant, R.1 aDumbre, Deepa, K.1 aPatil, N., S.1 aUphade, B., S.1 aBhargava, Suresh, Kumar  uhttps://library.ncl.res.in/content/epoxidation-styrene-t-butyl-hydroperoxide-over-gold-nanoparticles-supported-yb2o3-effect-0