Three-way catalyst for automotive emission control

Details Three-way catalyst for automotive emission control Three-way catalyst for automotive emission control

B - Operations, Transporting

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B01J 21/08 (2006.01) B01D 53/94 (2006.01) B01J 23/10 (2006.01) B01J 23/56 (2006.01) B01J 23/63 (2006.01)

Patent

CA 2026405

-18- Abstract of the Disclosure 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. 4528L

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