Process for elimination of hexavalent chromium compounds on metallic substrates within zero-PGM catalyst systems
US8969228B2 · kind B2 · utility
32Cited by
5References
17Claims
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Key dates
| Filing date | Jul 12, 2013 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Jul 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/52712
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Systems and Methods for manufacturing ZPGM catalysts systems that may allow the prevention of formation or the conversion of corrosion causing compounds, such as hexavalent chromium compounds, within ZPGM catalyst systems are disclosed. ZPGM catalysts systems, may include metallic substrate, which may include alloys of iron and chromium, a washcoat and an overcoat. Disclosed manufacturing processes may include a thermal decomposition of hexavalent chromium compounds which may allow the decomposition of such compounds into trivalent chromium compounds, and may also produce metallic catalyst, such as silver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.