摘要:
A hydrocarbon conversion process which utilizes a novel catalytic composite is disclosed. The catalyst composite comprises a platinum group metal component, a first modifier selected from Group IA and IIA elements of the Periodic Table, a second modifier component selected from the group of elements consisting of palladium, iridium, and osmium, and a third modifier component selected from the elements of Group IVA of the Periodic Table of the Elements. All of the catalytic components are located on a refractory oxide support having a nominal diameter (d) of from 50 to 10,000 microns. The catalytic composite is characterized in that the second modifier components is surface-impregnated upon the support in such a manner that the average concentration of the surface-impregnated second modifier component on the outside 0.2d micron catalyst layer is at least 2 times the average concentration of the second modifier component in 0.4d micron diameter center core of the catalyst where d is the nominal diameter, and wherein the first modifier metal component is uniformly impregnated. The process has been found to be most useful in the dehydrogenation of dehydrogenatable hydrocarbons.
摘要:
A novel catalytic composite is disclosed. Also disclosed is a use for the novel composite and a method for preparing the same. The catalytic composite comprises a Group VIII, noble metal component, a co-formed IVA metal component, an alkali metal or alkaline earth metal component and an alumina support having a surface area of from 5 to 150 m.sup.2 /g. Additionally the alumina support is such that less than about 18% of the total pore volume of the support is associated with pores having mean diameters of about 300 Angstroms or less and more than about 55% of the total pore volume of the support is associated with pores having mean diameters of about 600 Angstroms or more. The novel catalytic composite has particular utility as a paraffin dehydrogenation catalyst.
摘要:
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.
摘要:
Methane is upgraded to higher molecular weight hydrocarbons in a process using a novel catalyst comprising boron, tin and zinc. The feed admixture also comprises oxygen. The novel catalyst may comprise one or more Group I-A or II-A elements, preferably potassium.
摘要:
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.
摘要:
A novel dehydrogenation process is disclosed. This process comprises contacting dehydrogenatable hydrocarbons with a catalytic composite comprising a platinum component, a tin component, a potassium component, a lithium component, and an alumina support, wherein the lithium to potassium atomic ratio of said catalytic composite is in the range of from 3:1 to 5:1. The process of the invention has particular utility for the dehydrogenation of C.sub.3 -C.sub.30 paraffins.
摘要:
Methane is upgraded to higher molecular weight hydrocarbons in a process using a novel catalyst comprising oxides of boron, tin and zinc. The feed admixture also comprises oxygen. The novel catalyst may comprise one or more Group I-A or II-A elements, preferably potassium and is characterized by its method of manufacture.
摘要:
A novel catalytic composite and a process of its use is disclosed. The catalyst comprises a platinum group metal component, a first modifier component selected from Group IA and IIA elements of the Periodic Table, a second modifier components selected from the group of elements consisting of palladium, iridum, and osmium, and a third modifier component selected from the elements of Group IVA of the Peridoic Table of the Elements. All of the catalytic components are located on a refractory oxide support having a nominal diameter (d) of from 50 to 1000 microns. The catalytic composite is characterized in that the second modifier component is surface-impregnated upon the support in such a manner that the average concentration of the surface-impregnated second modifier component on the outside 0.2d micron catalyst layer is at least 2 times the average concentration of the second modifier component in 0.4d micron diameter center core of the catalyst where d is the nominal diameter, and wherein the first modifier metal component is uniformly impregnated. The catalytic composite has been found to be most useful in the dehydrogenation of dehydrogenatable hydrocarbons.
摘要:
A novel catalytic composite is disclosed. Also disclosed is a use for the novel composite and a method for preparing the same. The catalytic composite comprises a Group VIII, noble metal component, a co-formed IVA metal component, an alkali metal or alkaline earth metal component and an alumina support having a surface area of from 5 to 150 m.sup.2 /g. Additionally the alumina support is such that less than about 18% of the total pore volume of the support is associated with pores having mean diameters of about 300 Angstroms or less and more than about 55% of the total pore volume of the support is associated with pores having mean diameters of about 600 Angstroms or more. The novel catalytic composite has particular utility as a paraffin dehydrogenation catalyst.
摘要:
A novel hydrocarbon conversion catalyst is disclosed. Additionally, a method of preparing the catalyst and a process for its use are disclosed. The catalyst comprises a platinum group component, a Group IVA component and an alkali component on a carrier material. The alkali component further comprises from about 0.05 to about 10.0 wt. %, on the weight of the composite, of a second alkali metal. The catalyst has particular utility as a dehydrogenation catalyst.