Method for removing gaseous pollutants in highly dilute concentrations from air at room temperatures
US4474739A · kind A · utility
8Cited by
6References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 29, 1983 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Jun 29, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/8621
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hydrogen sulfide and hydrogen cyanide are catalytically removed from air at room temperatures. Air containing H.sub.2 S and HCN in dilute concentrations is contacted with a dry, activated catalyst formed of palladium (II) and copper (II) salts such as chlorides, on an alumina substrate, at a temperature in the range of -20.degree. C. to 85.degree. C. The catalyst may also contain nickel (II) chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.