Method and composition for utilizing lime-urea hydrates to simultaneously reduce NO.sub.x and SO.sub.x in combustion effluents
US4731233A · kind A · utility
31Cited by
7References
13Claims
0Family size
Inventors
Key dates
| Filing date | Jan 9, 1986 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Jan 9, 2006 |
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, employing 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.