Catalytic washcoat and method of preparation of the same

Details Catalytic washcoat and method of preparation of the same Catalytic washcoat and method of preparation of the same

1988-09-30

1990-02-13

Shine, W. J.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502320, 502332, 502333, 502334, 502335, 502336, 502439, 4232135, B01J 2104, B01J 3200

Patent

active

049007122

ABSTRACT:
The invention is concerned with a method of adsorbing uniformly onto preformed high surface area crystalline alumina one or more catalytically active non-noble (doping) oxide(s) and preferably alumina-stablilizing non-noble doping oxide(s), both from substantially neutral aqueous colloidal solutions thereof, drying and calcining the doped alumina to form an improved washcoating composition for receiving additionally catalytic noble metal particles.

REFERENCES:
patent: 4738947 (1988-04-01), Wan et al.
patent: 4791091 (1988-12-01), Bricker et al.
Ceria-Promoted Three-Way Catalysts for Auto Exhaust Emission Control, by Gwan Kim.
Ind. Eng. Chem. Prod. Res. Dev. 1982, 21, pp. 267-274, note, especially, p. 268, col. 1, under side heading "Monolithic TWC", lines 11-12 , and p. 272, col. 1, Effect of Non-Noble Metal Oxide Additives.

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