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US 4,786,625 AGranted
Dehydrogenation catalyst compositon
AssigneeUop LLC
InventorsTamotsu Imai, Hayim Abrevaya, Jeffery C. Bricker, Deng-Yang Jan
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AssigneeUop LLC
InventorsTamotsu Imai, Hayim Abrevaya, Jeffery C. Bricker, Deng-Yang Jan
Estimating the term…
A novel catalytic composite comprising a platinum group metal component; a modifier metal component selected from the group consisting of a tin component, germanium component, rhenium component and mixtures thereof; an optional alkali or alkaline earth metal component or mixtures thereof, an optional halogen component, and an optional catalytic modifier component on a refractory oxide support having a nominal diameter of at least about 850 microns. The distribution of the platinum group metal component is such that the platinum group component is surface-impregnated where substantially all of the platinum group metal component is located at most within a 400 micron exterior layer of the support. The effective amount of the modifier metal component is uniformly dispersed throughout the refractory oxide support. The distribution of the surface-impregnated platinum metal component is such that the novel catalyst has particular utility as a hydrocarbon dehydrogenation catalyst in a hydrocarbon dehydrogenation process.
A catalytic composite comprising a platinum group metal component, a modifier metal component selected from the group consisting of tin, germanium, rhenium, and mixtures thereof on a refractory oxide support having a nominal diameter of at least about 850 microns wherein the platinum group metal component is surface impregnated such that the average concentration of the surface-impregnated platinum group component on the outside 100 micron layer of the catalyst is at least 2 times the concentration of the platinum group component in the 200 micron diameter center core of the catalyst, and wherein the modifier metal component is uniformly impregnated through the refractory oxide support.
A catalytic composite comprising from about 0.01 to about 2.0 wt. % of a platinum component, from about 0.01 to about 5.0 wt. % of a modifier metal component selected from the group consisting of tin, germanium, and rhenium, and mixtures thereof, and from about 0.01 to about 1.0 wt. % of a lithium component on an alumina support having a nominal diameter of at least about 850 microns wherein the platinum component is surface impregnated such that the average concentration of the surface-impregnated platinum component on the outside 100 micron layer of the catalyst is at least 2 times the concentration of the platinum component in the 200 micron diameter center core of the catalyst and wherein the modifier metal component, and lithium component are uniformly impregnated.
Dependencies are inferred from the claim text.