Method and composition for utilizing lime-urea hydrates to simultaneously reduce NO.sub.x and SO.sub.x in combustion effluents
US4795586A · kind A · utility
7Cited by
8References
3Claims
0Family size
Inventors
Key dates
| Filing date | Nov 19, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Nov 19, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods and compositions are provided for simultaneous reduction of NO.sub.x and SO.sub.x in combustion effluents and process gas streams, exmploying a sorbent material of calcium or dolomitic lime hydrated with aqueous carboxamides, optionally with carbinol reductants, in amounts sufficient to reduce the NO.sub.x and SO.sub.x concentrations from the effluents. The sorbent material may be introduced as dry powders or wet hydrates in effluent streams at temperatures ranging from 400.degree. to 2400.degree. F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.