Method of manufacturing an exhaust gas purifying catalyst
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United States of America Patent
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May 4, 1993
Grant Date -
N/A
app pub date -
Mar 27, 1991
filing date -
Mar 30, 1990
priority date (Note) -
Expired
status (Latency Note)
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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.
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