Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1989-11-22
1991-02-12
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
4232135, B01J 2106, B01J 2310, B01J 2344, B01J 2346
Patent
active
049924052
ABSTRACT:
A three-way catalyst construction, including its method of making, which deploys palladium and rhodium as precious metal catalysts, and lanthanum oxide and titania as a nonprecious metal catalyst, in a unique combination and in a unique manner. The three-way catalyst construction for automotive emission control, such catalyst being applied to a mechanical carrier having a support comprised substantially of alumina, comprises: (a) a discontinuous lanthanum oxide coating on the support; (b) a catalytic precious metal compound of palladium and rhodium, where rhodium is no greater than 10% by proportion of the palladium with palladium being at least 60% by weight of the precious metal catalyst, said precious metal catalyst being discontinuously supported on the decorated support; and (c) a nonprecious metal catalytic compound of titanium oxide disposed discontinuously on or about said precious metal catalyst compound and lanthana.
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Chattha Mohinder S.
Gandhi Haren S.
Watkins William L. H.
Ford Motor Company
Malleck Joseph W.
May Roger L.
Shine W. J.
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