Process for the preparation of fluoromalonic acid and its derivatives
US4950367A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Jan 26, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B3/25
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for the preparation of fluoromalonic acid and derivatives thereof having the formula ##STR1## wherein R.sup.2 and R.sup.3 are equal or different and represent hydroxyl, the group OX, wherein X represents an alkali metal, alkaline earth metal or NH.sub.4.sup.+ ion or a C.sub.1 -C.sub.12 -alkyl group, or represent the group NR.sup.4 R.sup.5, wherein R.sup.4 and R.sup.5 are equal or different and are hydrogen or a hydrocarbon group of 1 to 12 carbon atoms, which comprises subjecting a compound of the formula ##STR2## wherein R.sup.1 is halogen of an atomic weight in the range from 35 to 127 and R.sup.2 and R.sup.3 have the meaning indicated above, to an electrolysis in an electrolyte liquid consisting of water, an organic solvent or a mixture thereof, at a temperature in the range of from - 20.degree. C. to the boiling temperature of the electrolyte, at a current density in the range of from 1 to 600 mA/cm.sup.2 at a cathode consisting of lead, cadmium, zinc, copper, tin, zirconium, mercury, alloys of at least 2 of these metals or of carbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.