Catalysts with high cobalt surface area
AssigneeJohnson Matthey PLC
InventorsMartinus C. Lok, Gordon J. Kelly, Gavin Gray
Life of this patent
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Abstract
A catalyst or precursor thereto comprising cobalt and/or a cobalt compound on a transition alumina support having a total cobalt content of at least 41% by weight and a cobalt surface area, after reduction, greater than 25 m2 per gram of total cobalt. The catalyst or precursor may be made by slurrying a transition alumina powder having a pore volume of at least 0.7 ml/g with an aqueous cobalt ammine carbonate complex and heating the slurry to decompose the complex.
Claims19
A particulate catalyst precursor comprising cobalt compounds supported on a transition alumina support and having a total cobalt content of 20 to 85% by weight, a pore volume above 0.3 ml/g, and a surface-weighted mean diameter D[3,2] in the range 1 μm to 200 μm and which, upon reduction, has a cobalt surface area of at least 25 m2 per gram of total cobalt.
A particulate catalyst comprising cobalt supported on a transition alumina support and having a total cobalt content of 20 to 85% by weight, a pore volume above 0.3 ml/g, a surface-weighted mean diameter D[3,2] in the range 1 μm to 200 μm, and a cobalt surface area of at least 25 m2 per gram of total cobalt.
A method of making a catalyst precursor containing 20 to 85% by weight of total cobalt comprising slurrying a transition alumina powder having a pore volume above 0.7 ml/g with an aqueous solution of a cobalt ammine complex, heating the slurry to cause the cobalt ammine complex to decompose with the deposition of an insoluble cobalt compound, filtering the solid residue from the aqueous medium and drying the solid residue.
Dependencies are inferred from the claim text.