Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1986-10-22
1988-06-28
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
4232135, B01J 2104, B01J 2106, B01J 2310, B01J 2374
Patent
active
047539151
ABSTRACT:
A carrier-supported catalyst is made by applying one or more non-noble metal and noble metal components on to a ceramic honeycomb structure coated with a layer of a heat-resistant metal oxide. To this end, the ceramic honeycomb structure is dipped at least once into an aqueous suspension of pseudoboehmite and zirconium oxide hydrate, the honeycomb structure so treated is dried at temperatures of up to 250.degree. C. and calcined at temperatures of up to 1000.degree. C.; next, the honeycomb structure is impregnated with an aqueous solution of at least one iron salt, and, if desired, nickel and cerium salts, dried at temperatures of up to 250.degree. C. and annealed at temperatures of up to 600.degree. C.; next, the honeycomb structure is impregnated with an aqueous solution containing at least one soluble compound of platinum, rhodium or palladium, and, if desired cerium, one of the solutions under (b) or (c) being required to contain cerium; the honeycomb structure so treated is ultimately dried at temperatures of up to 250.degree. C. and annealed at temperatures of up to 600.degree. C.
REFERENCES:
patent: 4294726 (1981-10-01), Bozon et al.
patent: 4367162 (1983-01-01), Fujitani et al.
patent: 4587231 (1986-05-01), Sawamura et al.
Glaser Hermann
Goedicke Eitel
Vogt Wilhelm
Hoechst Aktiengesellschaft
Shine W. J.
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