Selective epoxidation of styrene to styrene oxide by TBHP using simple transition metal oxides (NiO, CoO or MoO3) as highly active environmentally-friendly catalyst

Epoxidation of Butadiene Over Nickel Modified TS-1 Catalyst

“…Nevertheless, the process was inapplicable due to difficulties in the homogeneous catalysts separation/recycling. The simple, inexpensive metal oxides, such as NiO, CoO or MoO 3 , were employed as heterogeneous catalysts for the epoxidation of styrene using tertiary butylhydroperoxide as an oxidant [18]; among these transition metal oxides, NiO showed the best performance (styrene conversion was 52 %, and styrene oxide selectivity reached 86 %). Although the problem of catalysts separation/ recycling has been solved, the activity of simple transition metal oxide for alkenes epoxidation still requires promotion.…”

Transition metal complexes on mesoporous silica nanoparticles as highly efficient catalysts for epoxidation of styrene

“…Many kinds of heterogeneous catalysts, such as metal oxides, metal clusters, and metal-organic frameworks (MOFs), have been explored for catalytic epoxidation of styrene using tert-butyl hydroperoxide (TBHP) as an oxidant. Metal oxides are stable with moderately high catalytic activities [6][7][8]. For example, the metal oxide (c-Fe 2 O 3 ) nanoparticles in zeolites show 90% conversion [8].…”

Catalytic activity of hexagonal MoO3 modified with silver, palladium and copper

“…Homogeneous catalysts for hydroperoxide epoxidation of olefins complexes of various transition metals have been successfully used [6][7][8]; however, the application of these catalysts for epoxidation reaction on a large scale is limited due to the problems arising with catalyst regeneration and its separation from the reaction products. Therefore, much attention was focused on the application of transition metal oxides as the heterogeneous catalysts for olefin epoxidation [9,10]; among transition metal oxides MoO 3 shows much promise due to pronounced catalytic activity [11][12][13][14] which can be enhanced by modification of the catalyst surface with fine metal particles [15].…”