(674c) Development of a Practical Catalyst for Terminal Olefin Epoxidation Using Organic Hydroperoxide As Oxidant

Authors: 
Okrut, A., University of California, Berkeley
Grosso Giordano, N. A., Northwestern University
Zones, S. I., Chevron Energy and Technology Company
Katz, A., University of California Berkeley
Ouyang, X., University of California, Berkeley
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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