Abstract: Catalysts which produce cracked gasoline having high octane rating are produced by combining a thermally-stabilized/aluminum exchanged type Y zeolite with an inorganic oxide matrix.

Abstract: Isobutane may be dehydrogenated to isobutylene with increased selectivity by passing isobutane together with hydrogen and ammonia at 700.degree. F.-1200.degree. F. in the presence of a supported catalyst containing Group IA metals (Li, K) plus Pt-Re, Pt-Ge, or Pt-Re-Ge.

Abstract: A shape-selective hydrocracking catalyst prepared by making a composite of a hydrogenation component and a natural ferrierite that has been treated with oxalic acid to impart thereto catalytic activity for converting slightly branched as well as straight chain hydrocarbons. The catalyst is useful for hydrodewaxing and for upgrading naphtha.

Abstract: Particles of alloys of a noble metal chosen from among iridium, osmium, palladium, platinum, rhodium and ruthenium, hereafter represented by M, with at least one non-noble metal chosen among silver, bismuth, cadmium, cobalt, copper, tin, germanium, indium, manganese, mercury, molybdenum, nickel, gold, lead, rhenium, thallium, tellurium, technetium, tungsten, vanadium and zinc, hereafter referred to as Me', and Me', representing at least one non-noble metal, characterized in that they correspond to the general formulaM.sub.n Me'.sub.mwhere n represents an integer equal to 1, 2 or 3 and where m represents an integer equal to 1, 2 or 3, and in that their specific surface area is between 0.5 and 800 m.sup.2 /g of alloy and in that the mean diameter of the alloy particles is between 10 and 10,000 A.The particles are prepared by reducing the mixed oxides of the corresponding formulaM.sub.n Me'.sub.m O.sub.xThey are used as catalyst for dehydrogenation or hydrogenation.

Abstract: A process for the catalytic reforming of a hydrocarbonaceous feedstock at reforming conditions including a pressure of from about 50 to about 250 psig. is disclosed. A portion of the hydrogen-rich vapor phase recovered from the reforming zone effluent at a relatively low pressure is compressed and recycled to the reforming zone without further purification. The balance of said hydrogen-rich vapor phase, or the net hydrogen, is compressed to a relatively high pressure and recontacted with at least a portion of the liquid hydrocarbon phase recovered from said low pressure separation to effect a further purification of said net hydrogen and to maximize the recovery of C.sub.3 -C.sub.6 + material in the liquid phase.

Abstract: A process is provided for effecting hydroisomerization of a C.sub.4 -C.sub.8 paraffin by contacting the same under hydroisomerization conditions with a catalyst comprising a porous crystalline zeolite characterized by a silica/aluminum mole ratio of greater than 12 and a constraint index within the approximate range of 1 to 12, which zeolite has undergone controlled pretreatment by contact with water to enhance the acid activity thereof, expressed as alpha, to greater than about 300. The catalyst also comprises, intimately combined therewith, a minor proportion of a Group VIII metal.

Abstract: Octane and total yield improvement in catalytic cracking processes can be attained by the addition to conventional cracking catalysts of very small amounts of additive catalyst comprising a class of zeolites characterized by a silica to alumina mole ratio greater than about 12 and a constraint index of about 1 to 12. The additive catalyst is added to the conventional cracking catalyst in the cracking process in an amount which provides the zeolite component of the additive catalyst at from about 0.01 weight percent to about 1.0 weight percent of the conventional cracking catalyst in the cracking process.

Abstract: A new reforming process employs a new rhenium-platinum catalytic composite having a rhenium to platinum weight ratio in the range of not less than 2 to about 5, whereby longer relative cycle length is obtained when reforming a naphtha having less than about 0.5 ppm by weight of sulfur than if the rhenium-platinum ratio is outside of such range.

Abstract: There is provided, in accordance with the present invention, a catalyst composition made up of a mixture of two components, one component comprising a minor proportion of platinum and rhenium on a support and the second component comprising a minor proportion of iridium on a separate support. A process for reforming a charge stock, such as naphtha, utilizing such catalyst is also provided.

Abstract: A process, or procedure, for the start-up of reforming units, particularly those employing highly active sulfur-sensitive polymetallic, promoted noble metal containing catalysts. On start-up of a reforming unit, a sulfur-containing naphtha feed is fed at reforming conditions over a platinum-catalyst containing lead reactor of a series while bypassing subsequent reactors of the series, the product therefrom is separated into hydrogen-containing gas and C.sub.5.sup.+ liquid fractions, the hydrogen-containing gas fraction is desulfurized and dried and recycled to the platinum-catalyst containing lead reactor and, after sufficient hydrogen has been generated for operation of a Hydrofiner which is used to hydrodesulfurize the naphtha feed for the reformer, product from the platinum-catalyst containing lead reactor is fed to subsequent reactors of the series which contain the more sulfur-sensitive catalysts.

Abstract: A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of palladium and rhenium to which a small amount of iridium is added to increase the aromatic content of the reformate, particularly the high octane C.sub.9 + aromatics, and reduce the cooking tendency of the catalyst. It also encompasses the process of employing such catalyst in reforming, particularly high severity low pressure, semi-regenerative reforming.

Abstract: A process is disclosed for the catalytic reforming of hydrocarbons in the presence of hydrogen, preferably to produce high quality gasoline boiling range products. An improved recovery of normally gaseous hydrocarbons from the net excess hydrogen is realized by chilling and contacting said hydrogen with a normally liquid hydrocarbon stream in a plural stage absorption zone at an elevated pressure.

Abstract: A process for the catalytic reforming of a hydrocarbonaceous feedstock, preferably to produce high quality gasoline boiling range products, is disclosed. Relatively impure hydrogen is separated from the reforming zone effluent, compressed, and recontacted with at least a portion of the liquid reformate product to provide relatively pure hydrogen, a portion of which is recycled to the reforming zone. The balance is further compressed and recontacted with at least a portion of the liquid reformate product to provide an improved recovery of normally gaseous hydrocarbons as well as an improved recovery of purified hydrogen at a pressure suitable for use in the relatively high pressure hydrotreating of sulfur-containing feedstocks.

Abstract: A process for the catalytic reforming of a hydrocarbonaceous feedstock, preferably to produce high quality gasoline boiling range products, is disclosed. Relatively impure hydrogen is separated from the reforming zone effluent, compressed, and recontacted with at least a portion of the liquid reformate product to provide relatively pure hydrogen, a portion of which is recycled to the reforming zone. The balance is further compressed and recontacted with at least a portion of the liquid reformate product in a plural stage absorption zone to provide an improved recovery of normally gaseous hydrocarbons as well as an improved recovery of purified hydrogen at a pressure suitable, for example, the relatively high pressure hydrotreating of sulfur-containing feedstocks.

Abstract: A process is disclosed for the catalytic reforming of hydrocarbons in the presence of hydrogen, preferably to produce high quality gasoline boiling range products. An improved recovery of normally gaseous hydrocarbons from the net excess hydrogen is realized by chilling and contacting said hydrogen with a normally liquid hydrocarbon stream in a plural stage absorption zone at an elevated pressure.

Abstract: In a cyclic process for upgrading a hydrocarbon or hydrocarbon-forming feed by steps including regenerating of the zeolite catalyst, the operating period or cycle is substantially increased by using a ZSM-5 zeolite having a silica-to-alumina mol ratio in the range 61 to 140.

Abstract: A reforming process is disclosed which comprises contacting a sulfur-containing hydrocarbon material in at least one liquid phase scavenging or sulfur removal zone with at least one manganese-containing composition at conditions to remove at least a portion of said sulfur from said hydrocarbon material to produce a hydrocarbon feedstock having a reduced concentration of sulfur; and contacting said hydrocarbon feedstock with a catalyst comprising a minor catalytically effective amount of at least one platinum-group metal component, optionally, a major amount of a porous solid support, optionally, a minor catalytically effective amount of at least one halogen component, and optionally, at least one rhenium component in the presence of hydrogen at hydrocarbon reforming conditions to obtain a hydrocarbon reformate product.

Abstract: There is disclosed a catalyst, which catalyst comprises a physical particle-form mixture of a Component A and a Component B, said Component A comprising at least one Group VIII noble metal deposed on a solid catalyst support material providing acidic catalytic sites and said Component B comprising rhenium or a compound of rhenium deposed on a solid catalyst support material, said catalyst having been prepared by thoroughly blending finely-divided particles of Component A and Component B to provide a thoroughly-blended composite, said finely-divided particles having a particle diameter that is less than 100 mesh (150 microns), and forming said composite into particles having a size that is greater than 100 mesh (150 microns) and being suitable for use in a hydrocarbon conversion reaction zone.

Abstract: Steam dehydrocyclization of paraffinic hydrocarbons to aromatic hydrocarbons is effected in the presence of catalyst, typically a supported rhodium catalyst bearing copper.

Abstract: Octane and total yield improvement in catalytic cracking processes can be attained by the addition to conventional cracking catalysts of very small amounts of additive catalyst comprising a class of zeolites characterized by a silica to alumina mole ratio greater than 12 and a constraint index of about 1 to 12. The weight ratio of said zeolite of the additive catalyst to the amount of active component, e.g. faujasite zeolite, in the conventional cracking catalyst ranges from between about 1:400 and about 1:15.

Abstract: A process is provided for increasing gasoline octane number and/or total gasoline yield in catalytic cracking units by the addition of a very small amount of finely divided shape selective additive promoter, which additive promoter is not intimately combined with a substantial amount of another solid prior to contact with the cracking catalyst. The additive promoter, in one embodiment, is a crystalline aluminosilicate zeolite having a silica to alumina mole ratio greater than about 12 and a constraint index within the approximate range of 1 to 12.

Abstract: Steam dehydrocyclization of paraffinic hydrocarbons to aromatic hydrocarbons is effected in the presence of supported catalyst, typically bearing rhodium and preferably chromium and potassium, and characterized by a pH less than about 8.

Abstract: There is disclosed a catalyst, which catalyst comprises a physical particle-form mixture of a Component A and a Component B, said Component A comprising at least one Group VIII noble metal deposed on a solid catalyst support material providing acidic catalytic sites and said Component B comprising rhenium or a compound of rhenium deposed on a solid catalyst support material, said catalyst having been prepared by thoroughly blending finely-divided particles of Component A and Component B to provide a thoroughly-blended composite, said finely-divided particles having a particle diameter that is less than 100 mesh (150 microns), and forming said composite into particles having a size that is greater than 100 mesh (150 microns) and being suitable for use in a hydrocarbon conversion reaction zone.

Abstract: Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a novel attenuated superactive multimetallic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component, which is maintained in the elemental metallic state during the incorporation and pyrolysis of the rhenium carbonyl component, and of an iron component. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, pyrolyzed rhenium carbonyl component, iron component and optional halogen component are preferably present in the multimetallic catalytic composite in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, about 0.

Abstract: A method is provided for preparing a synthetic crystalline aluminosilicate zeolite Alpha containing platinum-group metal within the zeolite pores as synthesized, thereby providing shape-selective hydrogenation activity. The method comprises synthesizing the zeolite from a reaction mixture of controlled composition including a source of a cationic platinum-group metal complex. Catalysts made with the zeolite synthesized in accordance hereto are stable, both thermally and in the presence of steam, and exhibit beneficial shape-selectivity in catalysis and absorption.

Abstract: A hydrocarbon conversion catalyst comprising at least one platinum-group metal deposited on a composite comprising (I) alumina and (II) rhenium deposited on silica. The catalyst eliminates the need for presulfiding treatment required by conventional rhenium-promoted catalyst in reforming service, without comparative loss in reforming performance.

Abstract: Dehydrocyclizable hydrocarbons are converted to aromatics by contacting them at hydrocarbon dehydrocyclization conditions with an acidic multimetallic catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a nickel component, a zinc component, and a halogen component with a porous carrier material. The platinum group, nickel, zinc and halogen components are present in the multimetallic catalyst in amounts respectively, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % nickel, about 0.01 to about 5 wt. % zinc, and about 0.1 to about 3.5 wt. % halogen.

Abstract: There is disclosed a catalyst for the reforming of hydrocarbon streams. This catalyst comprises iridium as a hydrogenation component on a support of zirconia and alumina. The support comprises zirconia in an amount of about 3 wt.% to about 15 wt.% zirconia or at least 60 wt.% zirconia. The iridium is present in an amount of about 0.05 wt.% to about 1.5 wt.%, calculated as the metal and based upon the total weight of the catalyst.Also disclosed is a reforming process, which process comprises contacting a hydrocarbon stream in a reaction zone under reforming conditions and in the presence of hydrogen with the above-described catalyst.

Abstract: A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of palladium and platinum in total concentration ranging from about 0.2 to about 0.6 percent, in molar concentration of palladium:platinum ranging from about 1:1 to about 10:1 composited with an inorganic oxide support. In its preferred aspects the catalyst composite also contains rhenium, and more preferably a small amount of copper is added to suppress hydrogenolysis, which is particularly acute in reforming during the early period of operation when the catalyst is placed on stream, i.e., at the startup of a reactor; and process of employing such catalysts in reforming.

Abstract: Dehydrocyclizable hydrocarbons are converted to aromatics by contacting them at hydrocarbon dehydrocyclization conditions with an attenuated superactive acidic multimetallic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing catalytically effective amounts of a halogen component, a silver component and a uniform dispersion a catalytically effective amount of a platinum group component which is maintained in the elemental metallic state. The platinum group, pyrolyzed rhenium carbonyl, silver and halogen components are present in the multimetallic catalyst in amounts respectively, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, about 0.01 to about 5 wt. % silver and about 0.1 to about 3.5 wt. % halogen.

Abstract: A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of platinum and rhenium to which a small amount of copper is added to suppress hydrogenolysis, which is particularly acute in reforming during the early period of operation when the catalyst is placed on stream, i.e., at the startup of a reactor; and process of employing such catalyst in reforming.

Abstract: A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of palladium and rhenium to which a small amount of iridium is added to increase the aromatic content of the reformate, particularly the high octane C.sub.9.sup.+ aromatics, and reduce the coking tendency of the catalyst. It also encompasses the process of employing such catalyst in reforming, particularly high severity low pressure, semi-regenerative reforming.

Abstract: There is provided, in accordance with the present invention, a catalyst composition made up of a mixture of two components, one component comprising a minor proportion of platinum and rhenium on a support and the second component comprising a minor proportion of iridium on a separate support. A process for reforming a charge stock, such as naphtha, utilizing such catalyst is also provided.

Abstract: Process for reforming a hydrocarbon charge under reforming conditions in a reforming zone wherein added sulfur is introduced into said zone to counteract excessive hydrocracking of said charge utilizing a catalyst consisting essentially of a minor proportion of platinum on a support and a minor proportion of iridium on a separate support.

Abstract: ZSM-5 type zeolites as more specifically defined hereinabove, are added to reforming catalysts in order to produce a new catalyst composition with high catalytic activity and excellent selectivity. These new catalysts when utilized in reforming naphtha, reduce the C.sub.1 plus C.sub.2 concentrations in reformer gas product, while increasing the C.sub.3 plus C.sub.4 concentrations.

Abstract: Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a novel activated multimetallic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed ruthenium carbonyl component with a porous carrier material containing a uniform dispersion of a catalytically effective amount of a platinum group component, which is maintained in the elemental metallic state during the incorporation and pyrolysis of the ruthenium carbonyl component, and of a rhenium component. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, pyrolyzed ruthenium carbonyl component, rhenium component and optional halogen component are preferably present in the multimetallic catalytic composite in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % of the uniformly dispersed platinum group metal, about 0.01 to about 2 wt.

Abstract: A process for the catalytic conversion of aromatic fractions additionally containing variable proportions of C.sub.5 to C.sub.11 non-aromatic hydrocarbons, to obtain substantially pure benzene and hydrogen, by water dealkylation of the aromatic hydrocarbons and simultaneous reforming of the non-aromatic hydrocarbons, characterized in that aromatic fractions having boiling points which may be varied depending on the yield of hydrogen desired, are treated by steam at temperatures from 350.degree. C. to 600.degree. C., at a pressure of 1 to 80 bars, a volume of liquid passed per unit volume of catalyst of 0.1 to 10 and a water/hydrocarbon charge flow rate ratio of 0.2 to 4, in the presence of a dealkylation catalyst selected from at least one group VIII metal, on a support selected from a sieve L, a pretreated gamma alumina, and a mixed spinel (M.sub.x M'.sub.1-x) Al.sub.2 O.sub.4, M being a non-noble group VIII metal, and M' being selected from the group consisting of magnesium, manganese, and copper.

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 cobalt component, and a tantalum component with a porous carrier material. A specific example of the nonacidic catalytic composite disclosed herein is a combination of a platinum group component, a cobalt component, a tantalum component, and an alkali or alkaline earth component with a porous carrier material in amounts sufficient to result in a composite containing about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, about 0.01 to about 5 wt. % tantalum, and about 0.1 to about 5 wt. % alkali metal or alkaline earth metal.

Abstract: Catalyst compositions are provided comprising a refractory support, about 0.1 to about 2 percent by weight of platinum, about 0.1 to about 2 percent by weight of iridium and about 0.1 to about 5 weight percent of halogen where the platinum and iridium are contained on separate particles of said support. The relative weight ratio of the particles containing platinum and those containing iridium is between about 10:1 to about 1:10. The compositions are useful as hydrocarbon conversion catalysts and are especially applicable for use in catalyzing the reforming of naphtha petroleum fractions. There is also disclosed a reforming process conducted in the presence of hydrogen, under reforming conditions, in the presence of the above catalyst.

Abstract: Process for reforming a hydrocarbon charge under reforming conditions in a reforming zone containing a sulfur-sensitive metal containing reforming catalyst wherein over-cracking of the charge stock and excessive temperature rise in the reforming zone is suppressed by pre-conditioning the catalyst, prior to contact with the charge, with a reformate of specified octane number and aromatics content.

Abstract: An amorphous aluminosilicate sol with uniform size particles and a porous amorphous aluminosilicate powder are useful as catalyst in petroleum cracking. Water is removed from the sol without gelling so that the particles become uniformly packed into aggregates having pores of substantially uniform size and coating said powder with a surface layer 0 to 15% by weight of a metal or metal oxide, said powder having a specific surface area of 30 to 750 m.sup.2 /g, a bulk density of 0.5 g/cc or more and substantially uniform size pore diameters of from 20 A to 250 A, with pore diameters of 20 A to 45 A having a uniformity such that at least 90% of the pore volume is made up of pores of from 0.6D to 1.4D and pore diameters of 45 A to 250 A having a uniformity such that at least 80% of the pore volume is made up of pores of from 0.6D to 1.4D, where D is the median pore diameter.

Abstract: Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a novel attenuated superactive multimetallic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of a catalytically effective amount of a platinum group component, which is maintained in the elemental metallic state during the incorporation and pyrolysis of the rhenium carbonyl component, and of an iron component. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, pyrolyzed rhenium carbonyl component, iron component and optional halogen component are preferably present in the multimetallic catalytic composite in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, about 0.

Abstract: A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of platinum and rhenium to which a small amount of copper is added to suppress hydrogenolysis, which is particularly acute in reforming during the early period of operation when the catalyst is placed on stream, i.e., at the startup of a reactor; and process of employing such catalyst in reforming.

Abstract: A catalyst constituted of a composite which includes hydrogenation-dehydrogenation components comprised of palladium and platinum in total concentration ranging from about 0.2 to about 0.6 percent, in molar concentration of palladium:platinum ranging from about 1:1 to about 10:1 composited with an inorganic oxide support. In its preferred aspects the catalyst composite also contains rhenium, and more preferably a small amount of copper is added to suppress hydrogenolysis, which is particularly acute in reforming during the early period of operation when the catalyst is placed on stream, i.e., at the startup of a reactor; and process of employing such catalysts in reforming.

Abstract: Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a novel attenuated superactive multimetallic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of a catalytically effective amount of a platinum group component, which is maintained in the elemental metallic state during the incorporation and pyrolysis of the rhenium carbonyl component, and of a germanium component. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, pyrolyzed rhenium carbonyl component, germanium component and optional halogen component are preferably present in the multimetallic catalytic composite in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, about 0.

Abstract: Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a novel sulfided superactive multimetallic catalytic composite comprising a sulfided combination of a catalytically effective amount of a pyrolyzed rhenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component, which is maintained in the elemental metallic state during the incorporation and pyrolysis of the rhenium carbonyl component. In a highly preferred embodiment, this novel catalytic composite also contains a catalytically effective amount of a halogen component. The platinum group component, pyrolyzed rhenium carbonyl component, sulfur component, and optional halogen component are preferably present in the multimetallic catalytic composite in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, 0.001 to about 0.2 wt.

Abstract: A novel catalyst precursor which comprises a Group IV-B transition metal oxide deposited on the surface of an inorganic metal oxide support, preferably alumina; especially where the Group IV-B transition metal oxide is deposited on the support surface as discrete areas separated by areas of support surface which contain little, if any, of said Group IV-B transition metal oxide; and a catalyst composition comprised of a cluster of a Group IV-B transition metal oxide and a Group VIII metal preferably a Group VIII noble metal, deposited on an inorganic metal oxide support, particularly an alumina support, especially where the clusters are deposited on the surface of the support, as discrete clusters separated by areas of support surface which contain little, if any, of said Group VI-B transition metal oxide, or clusters of said Group IV-B and Group VIII metals.

Abstract: Dehydrogenatable hydrocarbons are dehydrogenated by contacting them, at dehydrogenation conditions, with a nonacidic catalytic composite comprising a combination of catalytically effective amounts of platinum group component, a cobalt component, a cadmium component, and an alkali or alkaline earth component with a porous carrier material in amounts sufficient to result in a composite containing, on an elemental basis, about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, about 0.01 to about 5 wt. % cadmium and about 0.1 to about 5 wt. % alkali metal or alkaline earth metal.

Abstract: A process for reforming a naphtha feedstock is disclosed. The reforming process is effected at reforming conditions in contact with a catalyst comprising a platinum group metal component and a Group IV-A metal component composited with an alumina support wherein said support is prepared by admixing an alpha alumina monohydrate with an aqueous ammoniacal solution having a pH of at least about 7.5 to form a stable suspension. A salt of a strong acid, e.g., aluminum nitrate, is commingled with the suspension to form an extrudable paste or dough. On extrusion, the extrudate is dried and calcined to form said alumina support.

Abstract: There is disclosed a catalyst for the reforming of hydrocarbon streams. This catalyst comprises iridium as a hydrogenation component on a support of zirconia and alumina. The support comprises zirconia in an amount of about 3 wt. % to about 15 wt. % zirconia or at least 60 wt. % zirconia. The iridium is present in an amount of about 0.05 wt. % to about 1.5 wt. %, calculated as the metal and based upon the total weight of the catalyst.Also disclosed is a reforming process, which process comprises contacting a hydrocarbon stream in a reaction zone under reforming conditions and in the presence of hydrogen with the above-described catalyst.