Halogen exchange process for manufacture of hydrochlorofluoropro

Details Halogen exchange process for manufacture of hydrochlorofluoropro Halogen exchange process for manufacture of hydrochlorofluoropro

1991-12-16

1997-03-04

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C07C 1720

Patent

active

056081278

ABSTRACT:
A process for the manufacture of a hydrochlorofluoropropane by halogen exchange using SbF.sub.5-y Cl.sub.y, where y=0 to 1, at 50.degree.-100.degree. C. to fluorinate a hydrochlorofluoropropane precursor characterized by the formula C.sub.3 HCl.sub.7-x F.sub.x, where x=2 to 5 and H is at a terminal carbon, wherein the degree of halogen exchange, p, and the number of moles, n, of SbF.sub.5-y Cl.sub.y per mole of precursor is such that (5-y)-(p
) is at least 3. Such a process produces a more highly fluorinated hydrochlorofluoropropane substantially free of perhalogenated or carbon--carbon cleavage products.

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