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Epoxidation of propylene to propylene oxide by molecular oxygen was studied over a modified Ag-MoO3 catalyst. The results show that MoO3 plays an important role in improving the efficiency of the catalyst, and a suitable content of MoO3 is 40-50 wt%. XPS reveals that some of the silver and molybdenum in the catalyst exist as Ag+ and Mo(6 - δ)+, respectively. The promotion effect of NaCl, Ce(NO3)3,...
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