Branched internally unsaturated perfluoro-olefins by

Branched internally unsaturated perfluoro-olefins by

Oligomerising tetrafluoroethylene (TFE) by contacting TFE in anhydrous conditions with at least one source of fluorine, viz. fluorides of K, Rb, Cs, or a quaternary ammonium radical, the fluoro-acids of K, Rb, r Cs, r the fluorinated salts giving rise to F ions, so as to produced branched-chain, int...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CROSBIE FIELDING,HAROLD, JOHN RUDGE,ALFRED
Format: Patent
Sprache:eng ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Oligomerising tetrafluoroethylene (TFE) by contacting TFE in anhydrous conditions with at least one source of fluorine, viz. fluorides of K, Rb, Cs, or a quaternary ammonium radical, the fluoro-acids of K, Rb, r Cs, r the fluorinated salts giving rise to F ions, so as to produced branched-chain, internally unsaturated perfluoro-olefins, preferably of formula (C2F4), where n = 4-7. Carrying out the reaction at 30-170 deg.C in an inert solvent, particularly dimethylformamide, using 0.1-15% of CsF relative to weight of TFE, under super-atmospheric pressure.