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US 5,395,997 AGranted
Process for the preparation of hydrofluorocarbons having 3 to 7 carbon atoms
AssigneeAlliedSignal Inc.
InventorsMichael Van Der Puy, G. V. Bindu Madhavan, Timothy R. Demmin
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Abstract
The invention relates to a process for preparing hydrofluorocarbons of the formulas CF.sub.3 (CH.sub.2 CF.sub.2).sub.n F comprising reacting at least one reactant selected from CCl.sub.3 (CH.sub.2 CCl.sub.2).sub.n Cl, CCl.sub.3 (CH.sub.2 CF.sub.2).sub.n Cl or CCl.sub.2 [(CH.sub.2 CF.sub.2)Cl].sub.2, where n=1 to 3, with hydrogen fluoride at a temperature of from about 25.degree. to about 200.degree. C.
Claims24
A process for preparing hydrofluorocarbons of the formula:
- CF.sub.3 (CH.sub.2 CF.sub.2).sub.n F I.
- wherein n=1 to 3 comprising reacting at least one reactant selected from CCl.sub.3 (CH.sub.2 CCl.sub.2).sub.n Cl, CCl.sub.3 (CH.sub.2 CF.sub.2).sub.n Cl and CCl.sub.2 [CH.sub.2 CF.sub.2)Cl].sub.2 with hydrogen fluoride at a temperature of from about 25.degree. to about 200.degree. C. in the presence of at least one fluorination catalyst selected from the group consisting of halides of Sn, Ti, Ta and Sb;
- wherein the HF is present in at least stoichiometric amounts per mole of reactant.
Dependencies are inferred from the claim text.