Catalyst for purifying exhaust gas from diesel engines

Details Catalyst for purifying exhaust gas from diesel engines Catalyst for purifying exhaust gas from diesel engines

1991-06-20

1993-01-05

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

502242, 502325, 502527, B01J 2904, B01J 3504, B01J 2340

Patent

active

051770415

ABSTRACT:
A catalyst for purifying exhaust gas from Diesel engines, having a catalyst component-carrying layer made of a refractory three-dimensional structure having carried thereon a catalyst component containing (a) a refractory inorganic oxide, (b) at least one noble metal selected from palladium and platinum, and (c) rhodium, wherein the rhodium is contained only in an upper layer portion of the catalyst component-carrying layer corresponding to no more than 80% in thickness of the catalyst component-carrying layer.

REFERENCES:
patent: 3914376 (1975-10-01), Barker
patent: 3965040 (1976-06-01), Kobylinski et al.
patent: 4128506 (1978-12-01), Hegedus et al.
patent: 4152301 (1979-05-01), Summers et al.
patent: 4153579 (1979-05-01), Summers et al.
patent: 4172047 (1979-10-01), Gandhi et al.
patent: 4806519 (1989-02-01), Chiba et al.

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