470142 Development of a Practical Catalyst for Terminal Olefin Epoxidation Using Organic Hydroperoxide As Oxidant

Thursday, November 17, 2016: 1:10 PM
Imperial B (Hilton San Francisco Union Square)
Alexander Okrut1, Nicolás A. Grosso Giordano2, Xiaoying Ouyang1, Stacey I. Zones3 and Alexander Katz4, (1)Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA, (2)Chemical and Biomolecular Engineering, University of California at Berkeley, Berkeley, CA, (3)Chevron Energy and Technology Company, Richmond, CA, (4)Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, CA

More than 30 % of worldwide propylene oxide production relies on an organic hydroperoxide as oxidant and grafted titanium centers on a siliceous support as catalyst. The industrial catalyst support is an amorphous and poorly defined silica network. Here, we investigate repercussions of a crystalline silaceous framework as support on the catalyst-site activity, selectivity, and long-term stability. Our data demonstrates that a crystalline microporous framework as support for grafted Ti centers can function at a higher per-gram-activity and selectivity when compared with a conventional amorphous catalyst, at similar loadings of isolated Ti sites, and also highlights the importance of localized framework structure on catalyst function.

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