Method for reactivating catalysts used for removing nitrogen oxides with steam
US4572903A · kind A · utility
10Cited by
2References
1Claims
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Key dates
| Filing date | Aug 27, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Aug 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/515
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for reactivating catalysts which comprises the steps of: PA1 jetting dry steam into a reactor which is charged with the catalysts deteriorated in performance, in order to remove dust adhering to and accumulating on the surfaces of the catalysts; PA1 spraying wet steam of 0.4 or less in wetness thereinto to elute and remove water-soluble poisonous materials accumulated inside the catalysts; and PA1 drying the catalysts with the dry steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.