Catalysts for cleaning exhaust gases

Details Catalysts for cleaning exhaust gases Catalysts for cleaning exhaust gases

1995-08-11

1998-01-20

Lewis, Michael

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 64, 502 71, 502 74, 502 77, B01J 2906

Patent

active

057100845

ABSTRACT:
A catalyst for cleaning exhaust gases has a first catalyst layer having as an active metal on an elemental support at least one noble metal selected from the group consisting of platinum, rhodium and palladium and a second catalyst layer having iridium as an active metal which is provided as a overlayer on the first catalyst layer.

REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 5164350 (1992-11-01), Abe et al.
Database WPI, Week 9347, Derwent Publications Ltd., London, GB, AN 93-373729 and JP-A-05 277 368 (TOYO KOGYO), 26 Oct. 1992, abstract only.
Database WPI, Week 9216, Derwent Publications Ltd., London, GB, AN 92-129097 and JP-A-04 074 534 (Nissan Motor), 9 Mar. 1992, abstract only.
European Search Report 95 85 0139 (Nov. 24, 1995).

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