Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2005-09-06
2005-09-06
Nguyen, Cam N. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S331000, C502S332000, C502S334000, C502S339000, C502S346000
Reexamination Certificate
active
06939824
ABSTRACT:
A highly durable exhaust emission control device which is provided in a container disposed in an intermediate portion of an exhaust system, wherein the exhaust emission control device comprises (1) a heat-resistant porous body having communicating pores, (2) a mixture of copper oxide and aluminum oxide supported on the surface of the porous body, and (3) platinum supported on the surface and an inner portion of the mixture, the grain size of the copper oxide being from 0.1 μm to 50 μm. The exhaust emission control device is manufactured by preparing the heat-resistant porous body; (2) applying to the porous body a slurry of a mixture of copper oxide and aluminum oxide and/or compounds convertible into these oxides by firing, and baking the mixture and/or compounds; and (3) applying a water-soluble platinum compound to the porous body, and baking the platinum compound. The platinum compound may be applied with the oxide mixture and/or the compounds of copper and aluminum to the porous body.
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Ihara Tomohiko
Nakagama Syoji
Shimoda Kouhei
McDermott Will & Emery LLP
Nguyen Cam N.
Sumitomo Electric Industries Ltd.
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