Method for preparing a catalyst for reduction of nitrogen oxides
US6673740B2 · kind B2 · utility
2Cited by
2References
11Claims
0Family size
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Key dates
| Filing date | Sep 25, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jun 21, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The catalyst is prepared by recycling a spent catalyst discharged from a hydro-desulfurization process of an oil refinery in which the spent catalyst comprises an alumina support with a large specific surface area impregnated with low contents of vanadium and high contents of molybdenum. The thus prepared catalyst has more excellent selective removal activity of nitrogen oxides at a high temperature window by containing suitable amounts of metal components therein as well as a better poisoning resistance to sulfur oxides, compared with the conventional catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.