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US 5,472,926 AGranted
Process for preparing a supported metal catalyst and catalyst thereof
AssigneeMinistero Dell `Universita` E Della Ricerca Scientifica E Tecnologica
InventorsGiuseppe Gubitosa, Maurizio Giampietri, Giuliano Vecchiato
Life of this patent
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Abstract
The process for preparing supported metal catalysts comprises the step of spending, in a solution of a metal compound, a carrier suitable for interacting with said compound, causing a polymer to interact with said carrier and submitting the resulting solid product to thermal treatment.
Claims4
A process for producing a supported metal catalyst which comprises:
- (a) heating a suspension comprising an aqueous solution of (i) a metal complex selected from the group consisting of Ni(NH.sub.3).sub.6 Cl.sub.2, Ni(NH.sub.3).sub.6 (OH).sub.2, and Ni(NH.sub.3).sub.6 CO.sub.3, (ii) a carrier capable of interacting with the metal complex, and (iii) a polymer capable of interacting both with the carrier and the metal in the metal complex once the complex has decomposed, so as to decompose the metal complex and thereby form a water-insoluble compound, wherein the polymer is selected from the group consisting of polyvinyl alcohol, polyethylene glycol, methylcellulose, hydroxymethylcellulose, polyacrylic acid, polyvinylpyrrolidone, polyacrylamide, and poly-alpha-methylstyrene, and
- (b) calcining the water-insoluble compound at a temperature of at least 400.degree. C. thereby producing a supported metal catalyst,
- wherein the amounts of metal complex, carrier, and polymer in the suspension are such that the concentration of metal in the supported metal catalyst is from 10% to 70% by weight, and the quantity of the polymer is such that the metal/polymer ratio in the supported metal catalyst is within the range of 3 to 11 by weight.
A supported metal catalyst produced by a process comprising:
- (a) heating a suspension comprising an aqueous solution of (i) a metal complex selected from the group consisting of Ni(NH.sub.3).sub.6 Cl.sub.2, Ni(NH.sub.3).sub.6 (OH).sub.2, and Ni(NH.sub.3).sub.6 CO.sub.3, (ii) a carrier capable of interacting with the metal complex, and (iii) a polymer capable of interacting both with the carrier and the metal in the metal complex once the complex has decomposed, so as to decompose the metal complex and thereby form a water-insoluble compound, wherein the polymer is selected from the group consisting of polyvinyl alcohol, methylcellulose, hydroxymethylcellulose, polyacrylic acid, polyvinylpyrrolidone, polyacrylamide, and poly-alpha-methylstyrene, and
- (b) calcining the water-insoluble compound at a temperature of at least 400.degree. C. thereby producing a supported metal catalyst,
- wherein the amounts of metal complex, carrier, and polymer in the suspension are such that the concentration of metal in the supported metal catalyst is from 10% to 70% by weight, and the quantity of the polymer is such that the metal/polymer ratio in the supported metal catalyst is within the range of 3 to 11 by weight.
Dependencies are inferred from the claim text.