Process for preparing fluorinated vinyl ethers
AssigneeHoechst Aktiengesellschaft
InventorsSteffen Dapperheld, Werner Schwertfeger, Manfred Wildt
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for preparing compounds of the formula (I) R.sub.1 --O--CF.dbd.CF.sub.2 by elimination of halogen atoms from compounds of the formula ##STR1## by electrolysis. The compounds of the formula (II) are electrolyzed in an undivided or divided electrolysis cell in an organic liquid which can also contain water at a temperature from -20.degree. C. to the boiling temperature of the electrolyte or catholyte at a current density of 1-500 mA/cm.sup.2 at a cathode made of lead, cadmium, zinc, copper, tin, zirconium, mercury, alloys of these metals or carbon.
Claims19
A process for preparing compounds of the formula
- (I) R.sub.1 --O--CF.dbd.CF.sub.2
- by elimination of halogen atoms from compounds of the formula ##STR22## in which R.sub.1 is ##STR23## with R.sub.4 = F, Cl, perfluoralkyl having 1-3 carbon atoms
- X = F, Cl, Br, I, H, --O--alkyl, --COO--alkyl,
- --SO.sub.2 F
- Y = F, Cl,
- n = 0-10
- m = 0-5
- R.sub.2 = Cl, Br,
- R.sub.3 = Cl, Br,
- which comprises electrolyzing the compounds of the formula (II) in an undivided or divided electrolysis cell in an organic liquid which can also contain water at a temperature of -20.degree. C. to the boiling temperature of the electrolyte or catholyte at a current density of 1-500 mA/cm.sup.2 at a cathode composed of lead, cadmium, zinc, copper, tin, zirconium, mercury, alloys of these metals or carbon.
Dependencies are inferred from the claim text.