Isocyanate manufacture
US8552217B2 · kind B2 · utility
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1References
20Claims
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Assignee
Inventors
Key dates
| Filing date | Feb 4, 2011 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Oct 12, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/771
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention encompasses the finding that improvements can be achieved in manufacture of isocyanates through the use of a substitute for or a precursor of phosgene. Methods and compositions utilized in accordance with the present invention can be useful in situations in which it is difficult to use phosgene, and in particular gaseous phosgene. In some embodiments, a substitute for or a precursor of phosgene used in accordance with the present invention for preparing isocyanates is or comprises diphosgene (ClCO2CCl3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.