Catalyst composition and process for making same
AssigneeBP Chemicals Limited & Johnson Matthey Public Limited Company
InventorsMichael James Baker, John William Couves, Kenneth George Griffin, Peter Johnston, James Colin McNicol, George Frederick Salem
Life of this patent
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Abstract
A composition and process for making same in which the composition comprises support particles having at least one catalytically active metal or precursor thereof distributed therein in a layer below the surface of said particle, said layer being between an inner and an outer region of said support particle) and each of said inner and outer regions having a lower concentration of said metal or precursor thereof than said layer.
Claims27
A composition comprising support particles having at least one catalytically active metal or precursor thereof distributed therein, in which the metal or precursor thereof is distributed in the support particle in a layer below the surface of said particle, said layer being between an inner and an outer region of said support particle, and each of said inner and outer regions having a lower concentration of said metal or precursor thereof than said layer.
A process for preparing a supported metal catalyst composition which process comprises impregnating support particles with a solution of least one catalytically active metal, or precursor thereof, such that the metal, or its precursor, is in a mobile state in the support particles and then treating the mobile metal, or precursor, in the support particles with at least one chemical reagent to deposit and immobilize the metal, or its precursor, in the support particles such that the metal or its precursor, is distributed in each support particle in a layer below the surface of said support particle, said layer being between an inner and an outer region, each of said inner and outer regions having a lower concentration of said metal or precursor than said layer.
Dependencies are inferred from the claim text.