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US 5,347,059 AGranted
Process for preparing 1,1-dichloro-1,3,3,3-tetra-fluoropropane
AssigneeSolvay (Societe Anonyme)
InventorsPascal Pennetreau, Francine Janssens, Pierre Barthelemy
Life of this patent
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Abstract
The invention relates to a process for preparing 1,1-dichloro-1,3,3,3-tetrafluoropropane by reacting, in the liquid phase, 1,1,1,3,3,3-hexachloropropane with hydrogen fluoride, in the presence of a catalyst.
Claims8
A process for preparing 1,1-dichloro-1,3,3,3-tetrafluoropropane, comprising:
- reacting 1,1,1,3,3,3-hexachloropropane in the liquid phase with hydrogen fluoride, in a mole ratio of hydrogen fluoride to 1,1,1,3,3,3-hexachloropropane of at least 4 and not exceed more than 20, at a reaction temperature of at least about 100.degree. C. and not more than about 150.degree. C., and in the presence of a tin tetrachloride catalyst to produce 1,1-dichloro-1,3,3,3-tetrafluoropropane;
- and
- recovering said 1,1-dichloro-1,3,3,3-tetrafluoropropane.
Dependencies are inferred from the claim text.