Exhaust emission control device and method of manufacturing the same
US6231817A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Dec 11, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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 .mu.m to 50 .mu.m. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.