Catalysts for the removal of nitrogen oxides
US4966873A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1988 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Nov 30, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a catalyst for removing nitrogen oxides from exhaust gases from internal combustion devices such as boilers, gas turbine and diesel engines which is characterized in that the catalyst contains Component A comprising type II anhydrous gypsum (insoluble anhydrite) and Component B comprising titanium oxide, the sum of the weights of Components A and B is equal to or more than 80 weight % of the total weight of the catalyst, the weight ratio of Component B to (Component A+Component B) is between 0.05 and 0.3, and the catalyst contains at least one or more of the oxides of vanadium, tungsten, molybdenum, iron, copper, chromium and manganese.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.