Catalysts for dehydrogenating ethylbenzene to styrene
AssigneeSUD Chemie MT S.r.l.
InventorsCarlo Rubini, Luigi Cavalli, Esterino Conca
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Abstract
Catalysts for dehydrogenating ethylbenzene to styrene which comprise iron oxide, oxides of alkaline and alkaline-earth metals, oxides of the lanthanide series, oxides of metals of the sixth group, prepared from a paste of iron oxide impregnated with an aqueous solution of a cerium salt, treated with aqueous KOH and calcined, after drying, to preform potassium ferrate, to which the other components or precursors of the catalyst are then added.
Claims8
Catalysts for dehydrogenating ethylbenzene to styrene, comprising iron oxide (Fe2O3), potassium oxide, magnesium and/or calcium oxides, cerium oxide, tungsten and/or molybdenum oxides and potassium ferrate wherein the numeral average size of the crystallites of said potassium ferrate is less than 2 microns and said potassium ferrate is preformed prior to the addition of the magnesium and/or calcium oxides or the precursors thereof, and tungsten and/or molybdenum oxides or the precursors thereof, by action of aqueous KOH on a paste of hydrated iron oxide impregnated with the aqueous solution of a cerium salt and drying and calcinating the resultant paste.
Dependencies are inferred from the claim text.