초록 ▼

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 alkali or alkaline earth metal component or mixtures thereof, an optional halogen

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 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 may be uniformly impregnated throughout the refractory oxide support, surface-impregnated, or located in any other appropriate fashion. The distribution of the surface-impregnated modifier metal component is such that the modifier metal component is substantially all located at most within a 400 micron exterior layer of the support. The novel catalyst has particular utility as a hydrocarbon dehydrogenation catalyst. A method of preparing the catalyst is also disclosed.

대표청구항 ▼

A 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 on a refractory oxide support having a nominal diameter of at least about 850 microns wher

A 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 on a refractory oxide support having a nominal diameter of at least about 850 microns wherein the platinum group component and the modified metal component are surface-impregnated such that the average concentration of the surface-impregnated platinum group component and modifier metal component on the outside 100 micron layer of the catalyst particle are each at least 2 times the concentration of the respective platinum group component and modifier metal component in the 200 micron diameter center core of the catalyst.