Process for the production of formamides
US4098820A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Mar 10, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/75
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to an improved process for the production of a formamide, wherein a current of a gas containing carbon monoxide is reacted at elevated temperature (50.degree.-200.degree. C) and pressure (5-110 bars) in a reaction zone with a recycled current of liquid reaction mixture containing PA1 (a) a nitrogen-containing compound selected from the group consisting of ammonia, a primary alkylamine and a secondary alkylamine (e.g. monomethylamine or dimethylamine); PA1 (b) a methanolic solution of an alkali metal or earth metal methoxide as catalyst, and PA1 (c) the formamide produced as reaction product, Part of the current of liquid reaction mixture being withdrawn in order to recover the formamide therefrom. The characteristic feature of the invention consists in that the recycled liquid reaction mixture is used for sucking and dispersing the current of gas in the reaction zone. Advantages of the process are: excellent heat exchange, high productivity and yield, absence of solid deposits on the internal surfaces of the apparatus, lower operating pressures and temperatures, use of apparatus of smaller dimensions, suppression of recycling of carbon monoxide, continuous ope…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.