Method of preparing supported platinum group metal catalysts
US4370260A · kind A · utility
2Cited by
2References
20Claims
0Family size
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Inventor
Key dates
| Filing date | Apr 20, 1981 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Apr 20, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A refractory inorganic oxide support is impregnated with a mixture which contains a platinum sulfito complex solution, a palladium sulfito complex solution, and a rhodium nitrate solution and has a pH of from about 1 to about 5. Activation of the impregnated support provides a three-way automotive exhaust catalyst having high efficiency and improved durability by a single impregnation method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.