Production of tetraethyl ammonium perfluoroalkyl sulphonate

Details Production of tetraethyl ammonium perfluoroalkyl sulphonate Production of tetraethyl ammonium perfluoroalkyl sulphonate

1977-12-07

1979-09-18

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 8730

Patent

active

041682777

ABSTRACT:
Production of tetraethyl ammonium perfluoroalkyl sulphonates (C.sub.2 H.sub.5).sub.4 N.sym.R.sub.F SO.sub.3 .crclbar., wherein R.sub.F represents a perfluorinated alkyl radical with about 4 to 10 carbon atoms, by reacting crude perfluoroalkyl sulphonic acid fluoride, i.e. perfluoroalkyl sulphonic acid fluoride which has not been especially purified, with triethylamine and an ethoxy silane, preferably dimethyl diethoxy silane, methyl triethoxy silane or tetraethoxy silane in an inert solvent at temperatures of about 10.degree. to 60.degree. C., preferably about 20.degree. to 40.degree. C. The process according to the invention is particularly suitable for the production of tetraethyl ammonium perfluorooctane sulphonate.

REFERENCES:
patent: 3346612 (1967-10-01), Hansen
patent: 3723512 (1973-03-01), Niederprum et al.
Beyl et al., Liebigs Ann. Chem., 731, pp. 58-66, 1970.
Gramstad et al., J. Chem. Soc., p. 2640, 1957.

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