Catalyst for purifying exhaust gas and method of producing same

Details Catalyst for purifying exhaust gas and method of producing same Catalyst for purifying exhaust gas and method of producing same

1996-11-25

1998-09-29

Langel, Wayne

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502326, 502327, 4232135, B01J 2300, B01J 2340, B01J 802

Patent

active

058145761

ABSTRACT:
A catalyst for purifying exhaust gas from an automotive internal combustion engine. The catalyst comprises a monolithic carrier which is coated with a catalyst component carrying layer which includes rhodium and a zirconium oxide. The zirconium oxide contains at least one element selected from the group consisting of magnesium, calcium, strontium, barium, yttrium and lanthanum. The zirconium oxide in the catalyst component carrying layer O.sub.c where X is at least one element selected from the group consisting of magnesium, calcium, strontium, barium, yttrium and lanthanum; and a, b and c indicate ratios in number of atoms, in which a is within a range of from 0.01 to 0.6 on the assumption of b being 1.0, and c is a number of oxygen atom which satisfies valence of respective elements.

REFERENCES:
patent: 5045521 (1991-09-01), Lox et al.
patent: 5198403 (1993-03-01), Brand et al.
patent: 5275997 (1994-01-01), Ganguli et al.
patent: 5492878 (1996-02-01), Fujii et al.

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