Composite catalyst for clarifying exhaust gas containing nitrogen oxides and method for producing the same
US4035263A · kind A · utility
3Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1976 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Feb 19, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/20761
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite catalyst which is capable of clarifying exhaust gas containing nitrogen oxides therein with a high effectiveness over a long period of time while producing no or a very small amount of undesirable by-products such as ammonia, which comprises a catalytic ingredient comprising oxides of nickel and copper in an atomic ratio of nickel to copper of 1:0.05 through 1 and a catalytic base comprising a refractory inorganic material containing at least 50% by weight of zircon therein, said catalytic ingredient being carried on said catalytic base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.