Method of manufacturing an exhaust gas purifying catalyst

Details Method of manufacturing an exhaust gas purifying catalyst Method of manufacturing an exhaust gas purifying catalyst

1991-03-27

1993-05-04

Shine, W. J.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502439, 4232135, B01J 2104, B01J 2342, B01J 2346, B01J 3200

Patent

active

052082067

ABSTRACT:
In a method of manufacturing an exhaust gas purifying catalyst, a carrier of heat-resistant alloy steel containing aluminum is initially prepared as a metallic carrier. A first alumina slurry containing fine particles of hydrated alumina and water is then coated on the surface of the metallic carrier and is in turn dried and calcined so that a first alumina layer may be formed on the surface of the metallic carrier. Thereafter, a second alumina slurry containing gamma-alumina particles, hydrated alumina and water is coated on the surface of the first alumina layer and is in turn dried and calcined so that a second alumina layer may be formed on the surface of the first alumina layer.

REFERENCES:
patent: 3920583 (1975-11-01), Pugh
patent: 4096095 (1978-06-01), Cairns
patent: 4279782 (1981-07-01), Chapman et al.
patent: 4397770 (1983-08-01), Cairns et al.
patent: 4888320 (1989-12-01), Ihara et al.

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