Alumina catalyst stable at high temperatures

Details Alumina catalyst stable at high temperatures Alumina catalyst stable at high temperatures

1981-10-28

1984-03-20

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502202, 502263, 502302, 502323, 502332, 502334, 502341, 502344, 502349, 502354, 502355, 4232135, B01J 2102, B01J 2104, B01J 2112, B01J 2310

Patent

active

044382197

ABSTRACT:
An alumina catalyst, which has a desired porosity and surface area and is stable at high temperatures is formed by contacting a substrate with an alkali aluminate solution for a period of time sufficient to form an adherent film of hydrated alumina on the substrate, separating the substrate with the adherent film of hydrated alumina from the solution, heating the substrate and alumina film under calcining conditions until an alumina film of desired porosity and surface area is formed, and then contacting the calcined alumina film with a material which stabilizes the alumina during subsequent heating. Optionally, the alumina film can then be further calcined at a temperature higher than that used in the first calcining conditions, preferably at a temperature up to about 1260.degree. C. The stabilizing material can be one of several compounds including those of barium, silcon, and the rare earth metals. Further, dissolving the stabilizing material and a catalytic metal, such as platinum, into a solvent, and contacting this solution with the calcined alumina film produces a substantially even distribution of the catalytic metal on the calcined alumina film.

REFERENCES:
patent: 3172866 (1965-03-01), Belon
patent: 3231520 (1966-01-01), Leak et al.
patent: 3291564 (1966-12-01), Kearby
patent: 3819536 (1974-06-01), Dalla Betta et al.
patent: 4140655 (1979-02-01), Chabot et al.

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