Abstract:
THE PRESENT INVENTION IS CONCERNED WITH CATALYSTS IN WHICH THE ACTIVE COMPONENTS ARE HIGHLY DISPERSED AND STABLE NOBLE METALS. IN ONE SPECIFIC ASPECT, THE INVENTION DEALS WITH CATALYST USEFUL IN THE REDUCTION OR ELIMINATION OF NOXIOUS COMPONENTS IN AUTO EXHAUST GASES. IN ANOTHER SPECIFIC ASPECT, THE INVENTION DEALS WITH THE STABILIZATION OF NOBLE METALS BY SELECTED SUPPORTS.
Abstract:
A HYDROPROCESSING CATALYST OF AN ALUMINA-CONTAINING CARRIER MATERIAL, A NICKEL COMPONENT AND AN IRON COMPONENT. THE CATALYST IS PREPARED VIA COEXTEUSION WHICH INHIBITS THE FORMATION OF NICKEL ALUMINATE TO THE EXTENT THAT LESS THAN ABOUT 0.1% THEREOF APPEARS IN THE FINAL CATALYTIC COMPOSITE.
Abstract:
CATALYSTS FOR THE OXIDATION, AMMOXIDATION AND OXIDATIVE DEHYDROGENATION OF OLEFINS COMPRISE COMPOSITIONS HAVING SCHEELITE TYPE CRYSTAL STRUCTURE, BISMUTH, AND CATION VACANCIES. ILLUSTRATIVE IS NA.44BI.52$.04MO O4.
Abstract:
In a process for the hydrogenation of an anthraquinone to the corresponding anthrahydroquinone in the production of hydrogen perioxide comprising hydrogenating said anthraquinone, oxidizing the resulting anthrahydroquinone and extracting hydrogen peroxide, the step comprising conducting said hydrogenation in the presence of a selective hydrogenation catalyst consisting essentially of a member selected from the group consisting of palladium black, palladium supported on a carrier, nickel, a palladium compound and a palladium compound supported on a carrier, wherein said catalyst has been treated with hydrogen or a molecular hydrogen containing gas at a temperature of from 150* to 650* C and for a period of time of from 10 to 240 minutes.
Abstract:
AN IMPROVED CATALYST COMPRISING A REFRACTORY SUPPORT AND PLATINUM PROMOTED WITH BOTH IRIDIUM AND GALLIUM, EXHIBITING INCREASED ACTIVITY AND SELECTIVE CHARACTERISTICS FOR THE DEHYDROCYCLIZATION AND REFORMING OF HYDROCARBONS IS PROVIDED. IN ONE EMBODIMENT, ALUMINA PROMOTER WITH PLATINUM, IRIDIUM, AMD GALLIUM, CONVERTED N-HEPTANE TO BENZENE AND TOLUENE WITH SUBSTANTIAL CONVERSION AT HIGH SELECTIVITY.
Abstract:
The catalyst comprises a hydrogenation component, a small amount of rhenium, and a small amount of gallium on a solid catalytic support comprising a porous refractory inorganic oxide. The rhenium and the gallium may be present either in the elemental form or as compounds. The preferred hydrogenation component is a Group VIII noble metal and the preferred porous refractory inorganic oxide is a catalytically active alumina. The reforming process comprises contacting a petroleum hydrocarbon stream in a reforming zone under reforming conditions and in the presence of hydrogen with the above-described catalyst. In one embodiment, the process comprises contacting a partially-reformed hydrocarbon stream in a reforming zone under reforming conditions and in the presence of hydrogen with the above catalyst. In another embodiment, the process comprises contacting a naphtha in a reforming zone under reforming conditions and in the presence of hydrogen with the above catalyst. In a third embodiment, the process comprises contacting the petroleum hydrocarbon stream in a first reforming zone under reforming conditions and in the presence of hydrogen with a first reforming catalyst to produce a first reformate and subsequently contacting the first reformate in a second reforming zone under reforming conditions and in the presence of hydrogen with a second reforming catalyst, said second reforming catalyst being the catalyst described in the preceding paragraph.
Abstract:
THE ACTIVE CATALYST FOR BURNING POLLUTANTS EXHAUSTED FORM AN INTERNAL COMBUSTION ENGINE CONSISTS ESSENTIALLY OF SORPTIVE ALUMINA MATRIX, FROM ABOUT 5 TO ABOUT 18 WEIGHT PERCENT MANGANESE MONOXIDE, FROM ABOUT 2 TO ABOUT 8 WEIGHT PERCENT CHROMIUM SESQUIOXIDE, AND FROM ABOUT 0.01 TO ABOUT 0.2 WEIGHT PERCENT PALLADIUM, THE UNIT WEIGHT RATIO OF MANGANESE MONOXIDE TO CHROMIUM SESQUIOXIDE BEING GREATER THAN ABOUT 2 AND LESS THAN ABOUT 3.5, AND THE TOTAL WEIGHT OF SUCH 2 OXIDES BEING FROM ABOUT 8 TO ABOUT 24%.
Abstract:
THE EXHAUST GAS FROM INTERNAL COMBUSTION ENGINES OR THE LIKE IS TREATED TO CONVERT HARMFUL OR POLLUTANT COMPONENTS SUCH AS NITROGEN OXIDES, CARBON MONOXIDE AND UNBURNED HYDROCARBONS TO INNOCUOUS COMPOUNDS, BY CONTACTING THE EXHAUST GAS WITH A CATALYST COMPOSITION CONTAINING NICKEL, COBALT AND MANGANESE IN CATALYTICALLY EFFECTIVE AMOUNTS, DEPOSITED ON A CARRIER SUCH AS ALPHA ALUMINA.
Abstract:
SILICEOUS ZEOLITE CATALYSTS COMPRISING ZEOLITE MONOAND/OR DIVALENT METAL CATIONS AND A NON-ZEOLITIC GROUP VIII METAL HYDROGENATING COMPONENT SUPPORTED THEREON, WHICH CATALYSTS HAVE UNDERGONE DAMAGE BY THERMAL AND/ OR HYDROTHERMAL STRESSES RESULTING IN A MALDISTRIBUTION OF THE METAL COMPONENTS, ARE REJUVENATED IN ACTIVITY BY A SEQUENTIAL TREATMENT WITH AN AQUEOUS AMMONIUM SALT TO EXCHANGE OUT AT LEAST A PORTION OF THE ZEOLITIC MONOAND/OR DIVALENT METAL IONS, AND WITH AQUEOUS AMMONIA TO EFFECT A REDISTRIBUTION OF THE GROUP VIII METAL. THE TREATMENTS MAY BE PERFORMED IN EITHER ORDER.
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 AND A LEAD COMPONENT WITH A POROUS CARRIER MATERIAL. A SPECIFIC EXAMPLE OF THE CATALYTIC COMPOSITE DISCLOSED HEREIN IS A COMBINATION OF A PLATINUM COMPONENT, A LEAD COMPONENT AND AN ALKALI OR ALKALINE EARTH COMPONENT WITH A POROUS CARRIER MATERIAL WHEREIN THE PLATINUM AND LEAD COMPONENTS ARE UNIFORMLY DISTRIBUTED THROUGHOUT THE POROUS CARRIER MATERIAL, WHEREIN THE COMPOSITE CONTAINS ABOUT 0.01 TO ABOUT 2 WT. PERCENT OF PLATINUM AND ABOUT 0.01 TO ABOUT 5 WT. PERCENT OF THE ALKALI METAL OR ALKALINE EARTH METAL AND WHEREIN THE LEAD COMPONENT IS PRESENT IN AN AMOUNT SUFFICIENT TO RESULT IN AN ATOMIC RATIO OF LEAD TO PLATINUM OF ABOUT 0.05:1 TO ABOUT 0.6:1.