Catalytic system for epoxidation of alkenes
AssigneeUnion Carbide Chemicals and Plastics Company Inc.
InventorThomas M. Notermann
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Abstract
A process is provided for epoxidation of an alkene in the presence of an oxygen-containing gas which comprises contacting the alkene and the oxygen-containing gas under epoxidation conditions in the presence of at least one gaseous efficiency-enhancing member of a redox-half reaction pair and a supported silver catalyst, the catalyst comprising a catalytically effective amount of silver on a solid porous support having a stability-enhancing morphology and an efficiency-enhancing amount of at least one efficiency-enhancing salt of a member of a redox-half reaction pair, the support having a surface area of at least about 0.7 m.sup.2 /g and a particulate matrix which contains particles having at least one substantially flat major surface.
Claims10
A process for the epoxidation of alkene in the presence of an oxygen-containing gas comprising said alkene and the oxygen-containing gas under epoxidation conditions in the presence of at least one gaseous member of a redox-half reaction pair comprising NO, NO.sub.2, N.sub.2 O.sub.3, N.sub.2 O.sub.4, or a gas capable of generating one of the above-mentioned gases under epoxidation conditions and a supported silver catalyst, said catalyst comprising a catalytically effective amount of silver on a solid, porous support having an efficiency-enhancing amount of at least one efficiency-enhancing nitrate salt, said support consisting essentially of alpha-alumina and having a surface area of at least about 0.7 m.sup.2 /g and at least 50 percent of the support particles having particle sizes of at least 0.1 micron have a platelet-type morphology.
Dependencies are inferred from the claim text.