Production of phosgene
US4346047A · kind A · utility
1Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1978 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Oct 2, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A molten salt containing the higher and lower valent chlorides, such as mixture of cuprous and cupric chloride, is contacted with oxygen and hydrogen chloride to enrich the salt in the higher valent metal chloride. The salt enriched in the higher valent metal chloride is contacted with carbon monoxide to both strip gaseous chlorine from the salt and produce phosgene by reaction with carbon monoxide and thereby recover essentially all chlorine values added to the salt. The reaction can be effected to provide stoichiometric quantities of carbon monoxide and chlorine in the effluent for producing additional phosgene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.