Method of recycling spent flue gas denitration catalyst
US7943544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Dec 6, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a method of recycling a spent flue gas denitration catalyst and a method of determining a washing time of the spent flue gas denitration catalyst. The method of recycling the spent flue gas denitration catalyst includes physically removing solids deposited in the spent flue gas denitration catalyst, removing poisoning substances deposited in the spent flue gas denitration catalyst by washing the spent flue gas denitration catalyst with a washing liquid for a washing time determined by measuring the hydrogen ion concentration of the washing liquid and drying the resulting spent flue gas denitration catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.