Removal of phosphine contaminant from carbon monoxide gas mixtures
US4185079A · kind A · utility
8Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Jun 8, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10K1/102
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for removing small concentrations of phosphine contained in a carbon monoxide gas mixture by preferentially oxidizing the phosphine, in which the phosphine is oxidized with air at a temperature of from 500.degree. C. to 800.degree. C. to form phosphorus pentoxide, which is recovered from the gas mixture preferably as phosphoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.