Abstract:
Naphthenic hydrocarbons are isomerized using a catalytic composite comprising a combination of a platinum or palladium component, a rhodium component, a tin component and a halogen component with a porous carrier material.
Abstract:
Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a sulfided acidic multimetallic catalytic composite comprising a combination of catalytically effective amounts of a platinum or palladium component, a rhodium component, a tin component, a halogen component, and a sulfur component with a porous carrier material. The platinum or palladium component, rhodium component, tin component, halogen component, and sulfur component are present in the multimetallic catalyst in amounts respectively, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum or palladium metal, about 0.01 to about 2 wt. % rhodium, about 0.01 to about 5 wt. % tin, about 0.1 to about 3.5 wt. % halogen, and about 0.01 to about 1 wt. % sulfur. Moreover, the metallic components are uniformly dispersed throughout the porous carrier material in carefully controlled oxidation states such that substantially all of the platinum or palladium component and the rhodium component are present therein in a sulfided state or in a mixture of the sulfided state and the elemental metallic state and such that substantially all of the tin component is present therein in an oxidation state above the elemental metal and in a particle size less than 100 Angstroms in maximum dimension. The sulfiding of the catalytic composite is performed prior to any contact of the composite with hydrocarbon and after substantially all of the platinum or palladium and rhodium components are reduced to the elemental metallic state by treatment with a sulfiding gas at conditions selected to incorporate about 0.01 to about 1 wt. % sulfur. The resulting sulfided catalyst has the capability of diminishing undesired demethylation and other hydrogenolysis reactions during initial operation of the process and markedly increasing the over-all stability of the process.
Abstract:
Dehydrogenatable hydrocarbons are dehydrogenated by contacting them, at dehydrogenation conditions, with a catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a Group IB transition metal component, a rhenium component and a tin component with a porous carrier material. A specific example of the catalytic composite disclosed herein is a combination of a platinum group component, a Group IB component, a rhenium component, a tin component and an alkali or alkaline earth component with a porous carrier material wherein substantially all of the platinum group component, the Group IB component and the rhenium component are present as the corresponding elemental metals and substantially all of the tin component is present in an oxidation state above the elemental metal, and wherein the composite contains about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % Group IB metal, about 0.01 to about 2 wt. % rhenium, about 0.01 to about 5 wt. % tin and about 0.01 to about 5 wt. % alkali or alkaline earth metal.
Abstract:
Dehydrogenatable hydrocarbons are dehydrogenated by contacting them at dehydrogenation conditions, with a catalytic composite comprising a combination of catalytically effective amounts of a platinum or palladium component, a rhodium component, and a tin component with a porous carrier material. A specific example of the catalytic composite disclosed herein is a combination of a platinum or palladium component, a rhodium component, a tin component, and an alkali or alkaline earth component with a porous carrier material wherein substantially all of the platinum or palladium component and the rhodium component are present therein as the corresponding elemental metals and substantially all of the tin component and the alkali or alkaline earth component are present therein in an oxidation state above the elemental metal, and wherein the composite contains about 0.01 to about 2 wt. % platinum or palladium, about 0.01 to about 2 wt. % rhodium, about 0.01 to about 5 wt. % tin, and about 0.1 to about 5 wt. % alkali metal or alkaline earth metal.
Abstract:
Olefinic hydrocarbons are isomerized using a catalytic composite comprising a combination of a platinum or palladium component, a rhodium component, a tin component and a halogen component with a porous carrier material.
Abstract:
A gasoline fraction is catalytically reformed by contacting the gasoline fraction and a hydrogen stream at reforming conditions with an activated bimetallic acidic catalytic composite comprising a combination of a platinum group component, a tin component and a halogen component with a porous carrier material, the catalytic composite having been activated by contacting same with an activating gas comprising oxygen and a halogenating component selected from the group consisting of halogen and hydrogen halide at a temperature between 700.degree. and 1100.degree. F. for a time of at least 0.5 to about 10 hours. Also disclosed is a process for activating a catalytic composite containing platinum in the form of platinum, platinum oxide or platinum sulfide, tin in the form of tin oxide or tin sulfide and halide in combination with a porous alumina carrier material, which process comprises contacting the catalytic composite with an activating gas comprising oxygen and a halogenating component selected from the group consisting of halogen and hydrogen halide at a temperature of about 700.degree. to 1100.degree. F. for a time of at least about 0.5 to about 10 hours.
Abstract:
A superactive acidic bimetallic catalytic composite, comprising a combination of catalytically effective amounts of a platinum group component and a tin component and of a computed amount of a halogen component with a porous carrier material, is disclosed. The platinum group and tin component are present in the composite in amounts, calculated on an elemental basis, of about 0.01 to about 2 wt. % platinum group metal and about 0.01 to about 5 wt. % tin. The amount of the halogen component is selected as a function of the surface area of the porous carrier material and of the moles of tin contained in the composite in accordance with a hereinafter disclosed relationship. Moreover, the tin component is uniformly dispersed throughout the porous carrier material in a particle size having a maximum dimension less than 100 A and substantially all of the platinum group component is present as the elemental metal and substantially all of the tin is present in an oxidation state above that of the elemental metal. The principal utility of this superactive acidic bimetallic composite is in the conversion of hydrocarbons, particularly in the reforming of a gasoline fraction. A specific example of the superactive acidic bimetallic catalyst disclosed is a combination of a platinum group metal, tin and chlorine with an alumina carrier material wherein the tin component is uniformly dispersed throughout the alumina carrier material in a positive oxidation state and in a relatively small particle size and wherein the composite contains, on an elemental basis, about 0.01 to 2 wt. % platinum metal, about 0.01 to 5 wt. % tin and chlorine in an amount determined as a function of the surface area of the alumina and of the mole content of tin in accordance with an equation herein specified.
Abstract:
A process for hydrotreating (hydroprocessing) hydrocarbons and mixtures of hydrocarbons utilizing a catalytic composite of a porous carrier material, a platinum or palladium component, a rhodium component and a tin component, in which process there is effected a chemical consumption of hydrogen. A specific example of one such catalyst is a composite of a crystalline aluminosilicate, a platinum component, a rhodium component and a tin component, for utilization in a hydrocracking process. Other hydrocarbon hydroprocesses are directed toward the hydrogenation of aromatic nuclei, the ring-opening of cyclic hydrocarbons, desulfurization, denitrification, hydrogenation, etc.
Abstract:
A process for hydrotreating (hydroprocessing) hydrocarbons and mixtures of hydrocarbons utilizing a catalytic composite of a porous carrier material, a platinum or palladium component, a rhodium component and a tin component, in which process there is effected a chemical consumption of hydrogen. A specific example of one such catalyst is a composite of a crystalline aluminosilicate, a platinum component, a rhodium component and a tin component, for utilization in a hydrocracking process. Other hydrocarbon hydroprocesses are directed toward the hydrogenation of aromatic nuclei, the ring-opening of cyclic hydrocarbons, desulfurization, denitrification, hydrogenation, etc.
Abstract:
Dehydrogenatable hydrocarbons are dehydrogenated by contacting them at dehydrogenation conditions with a catalytic composite, comprising a combination of catalytically effective amounts of a platinum or palladium component, an iridium component, a rhenium component, and a tin component with a porous carrier material. A specific example of the subject dehydrogenation method involves contacting a dehydrogenatable hydrocarbon and hydrogen, at dehydrogenation conditions, with a catalytic composite comprising a combination of a platinum or palladium component, an iridium component, a rhenium component, and a tin component with a porous carrier material wherein substantially all of the platinum or palladium component, the iridium component and the rhenium component are present as the corresponding elemental metals and substantially all of the tin component is present in an oxidation state above the elemental metal, and wherein the composite contains about 0.01 to about 2 wt.% platinum or palladium, about 0.01 to about 2 wt.% iridium, about 0.01 to about 2 wt.% rhenium, and about 0.01 to about 5 wt.% tin.