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AssigneeDow Global Technologies LLC
InventorsGarmt R. Meima, Howard W. Clark, Robert G. Bowman, Alex Kuperman, George E. Hartwell
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A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as prbpylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the platinum group metals, the lanthanide rare earths, the actinide elements, and combinations thereof. In preferred embodiments, the catalyst is calcined prior to use, rather than reduced prior to use. Suitable titanium-containing supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.
A process of preparing an olefin oxide comprising contacting an olefin having at least three carbon atoms with oxygen in the presence of hydrogen and an optional diluent, and in the presence of a catalyst comprising silver, at least one platinum group element, and a titanium-containing support, the catalyst being calcined, and not reduced, prior to use.
A catalyst composition comprising silver, at least one platinum group metal, and a titanium-containing support, the catalyst being calcined, and not reduced, prior to use.
Dependencies are inferred from the claim text.