Procedure for the preparation of alkyl isocyanates
US5315034A · kind A · utility
6Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | May 11, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C263/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Multistep process for the preparation of alkyl mono and diisocyanates consisting in reacting the corresponding aliphatic amine or diamine with dimethylcarbonate and, substantially, in partially vaporizing and converting the urethane thus formed in an evaporator to subsequently terminate the cracking in a II.degree. reactor, and finally subjecting the cracking product to fractional distillation at reduced pressure, recycling the unconverted part to the partial vaporization step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.