Patent · US Expired

Process for preparing polyfluorocarboxylic acid chlorides and perfluorocarboxylic acid chlorides

US5545298A · kind A · utility

4Cited by

10References

8Claims

0Family size

Assignee

SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

Max Braun · Großburgwedel, DE
Werner Rudolph · Hannover, DE
Kerstin Eichholz · Langenhagen, DE

Key dates

Filing date	Aug 10, 1994
Grant date	Aug 13, 1996
Priority date	—
Expiry date	Aug 10, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/58
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing compounds corresponding to the formula RCFXC(O)Cl, in which X is fluorine or chlorine and R is fluorine or a perfluorinated C1- C10-alkyl group, preferably chlorodifluoroacetyl chloride, by photochemical oxidation of R122 (CF.sub.2 ClCHCl.sub.2) and the preparation of trifluoroacetyl chloride by photochemical oxidation of R123 (CF.sub.3 CHCl.sub.2) with oxygen under irradiation. The reaction is preferably carried out without pressurization and without addition of elemental chlorine.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.