Catalyst of rhodium on alpha alumina-coated substrate

Details Catalyst of rhodium on alpha alumina-coated substrate Catalyst of rhodium on alpha alumina-coated substrate

1978-09-18

1979-10-23

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

4232135, B01J 2104, B01J 2346

Patent

active

041720474

ABSTRACT:
A catalyst system is taught for treating exhaust gases from an internal combustion engine. The catalyst system includes a substrate and a wash coat on the substrate. The wash coat is formed substantially of alpha phase alumina. A catalyst is placed on the wash coat consisting of rhodium metal or rhodium metal with another catalyst metal. By using alpha phase alumina as the wash coat, the rhodium is not dissolved into the wash coat during periods when the catalyst system is subjected to high temperature oxidizing conditions.

REFERENCES:
patent: 3118727 (1964-01-01), Cohn
patent: 3895093 (1975-07-01), Weidenbach et al.
patent: 4006103 (1977-02-01), Meguerian et al.
patent: 4020013 (1977-04-01), Brennan

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