Process for the reduction of nitrogen oxides in an effluent
US4770863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Feb 13, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00058
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the reduction of nitrogen oxides from an effluent from the combustion of a carbonaceous fuel is presented. More particularly, this process comprises injecting into the effluent droplets of a mixture comprising ammonia and an enhancer selected from the group consisting of hexamethylenetetraamine, a lower carbon alcohol, sugar, furfural, furfural derivatives, a hydroxyl amino hydrocarbon, an amino acid, a protein-containing composition, mixtures of ortho-, meta-, and para-methyl phenols, guanidine, guanidine carbonate, biguanidine, guanylurea sulfate, melamine, dicyandiamide, calcium cyanamide, biuret, 1,1'-azobisformamide, methylol urea, methylol urea-urea condensation product, dimethylol urea, methyl urea, dimethyl urea, and mixtures thereof, under conditions effective to reduce the concentration of nitrogen oxides in the effluent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.