Purification of organic isocyanates
US4065362A · kind A · utility
6Cited by
5References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1975 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Jun 2, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C263/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for purifying an organic isocyanate which comprises heating an organic isocyanate in admixture with a treating agent selected from the group consisting of a metal salt of mercaptobenzothiazol, a dithiocarbamic acid derivative, an alkyl-substituted phenol, a thio-bisphenol, and a triaryl phosphite at a temperature not lower than 100.degree. C and subsequently distilling the thusly treated mixture to recover a purified organic isocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.