Method for removing ammonia from ammonia contaminated fly ash
US6077494A · kind A · utility
16Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1999 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Feb 24, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01C1/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for removing ammonia from coal fly ash contaminated by ammonium salts is disclosed. The method involves the addition of small amounts of water, and in some cases, small amounts of an alkali source, to the fly ash to liberate the ammonia trapped therein. The ammonia liberation may be further aided by vigorous mixing of the fly ash.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.