Exhaust-gas catalyst with reduced tendency to store sulfur oxide

Details Exhaust-gas catalyst with reduced tendency to store sulfur oxide Exhaust-gas catalyst with reduced tendency to store sulfur oxide

1989-05-01

1990-10-16

Shine, W. J.

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

Catalyst or precursor therefor

Boron or compound containing same

4232135, B01J 2102, B01J 2104, B01J 2310, B01J 2340

Patent

active

049635212

ABSTRACT:
A catalyst for purifying the exhaust gases of internal combustion engines by means of oxidation and reduction with a reduced tendency to store sulfur oxides and to emit H.sub.2 S contains active Al.sub.2 O.sub.3 as carrier which is charged with CeO.sub.2 and optionally with ZrO.sub.2 as well as with platinum, and/or palladium, and optionally rhodium and also contains in addition 0.7 to 20% by weight B.sub.2 O.sub.3 relative to Al.sub.2 O.sub.3.

REFERENCES:
patent: 4120821 (1978-10-01), Iizuka et al.
patent: 4233183 (1980-11-01), Inaba et al.
patent: 4237030 (1980-12-01), Noguchi et al.
patent: 4294726 (1981-10-01), Bozon et al.
patent: 4581343 (1986-04-01), Blanchard et al.

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