PREPARATION OF 1,1-DICHLORO-2,2,2-TRIFLUOROETHANE

PREPARATION OF 1,1-DICHLORO-2,2,2-TRIFLUOROETHANE

PURPOSE:To prepare the titled compound useful as a refrigerant, etc. in high yield, by reducing an easily preparably 1,1,1-trichloro-2,2,2-trifluoroethane as a starting raw material with zinc in a protonic solvent. CONSTITUTION:1,1,1,-Trichloro-2,2,2-trifluoroethane obtained by isomerizing CCl2FCClF...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TAKAMATSU SHIYUUICHI, MISAKI SUSUMU
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:PURPOSE:To prepare the titled compound useful as a refrigerant, etc. in high yield, by reducing an easily preparably 1,1,1-trichloro-2,2,2-trifluoroethane as a starting raw material with zinc in a protonic solvent. CONSTITUTION:1,1,1,-Trichloro-2,2,2-trifluoroethane obtained by isomerizing CCl2FCClF2 with an aluminum halide catalyst or photochlorinating CH3CF3 is reduced with zinc in protonic solvent, e.g. water or acetic acid, preferably about 50-150 deg.C, particularly about 70-90 deg.C, under about 0-10kg/cm .G, preferably about 2-4kg/cm .G, to give 1,1-dichloro-2,2,2-trifluoroethane. USE:An intermediate for ''Flon 124'' which is a working fluid and trifluoroacetic acid.