Cobalt oxide-based catalytic substances for the oxidation of ammonia
US4036935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1976 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Feb 9, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention concerns catalytic substances for the oxidation of ammonia, for the production of nitric acid, comprising cobalt oxide as the main component. Such substances, besides cobalt oxide, also contain additives formed of aluminum oxide and possibly oxides of thorium, cerium, zinc and cadmium, the amount of aluminum oxide added being from 5% to 15% by weight of the finished substances and the amount of the other oxides being from 0 to 25% by weight of the finished substances; these substances are in particular shaped by pelleting or extrusion, dried and then calcined at temperatures of the order of from 900.degree. to 1000.degree. C. The advantages of these catalytic substances lie in a high degree of activity and a high level of strength, which are maintained during use thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.