Process for preparing telomers from chlorotrifluoroethylene and

Details Process for preparing telomers from chlorotrifluoroethylene and Process for preparing telomers from chlorotrifluoroethylene and

1987-11-05

1989-07-18

Evans, J. E.

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

Organic compounds

Halogen containing

570139, C07C 1726, C07C 1908

Patent

active

048495565

ABSTRACT:
Telomers are prepared by reacting chlorotrifluoroethylene with 1,1,2-trichlorotrifluoroethane (CCl.sub.2 FCF.sub.2 Cl) in the presence of metallic iron or stainless steel, and optionally, a halide-containing compound selected from the group consisting of tetrabutyl ammonium bromide, tetramethyl ammonium chloride, n-chlorosuccinimide, triethylamine hydrochloride, LiCl, MoCl.sub.5 and FeCl.sub.3. The reaction is conducted at a temperature of from about 150.degree. C. to about 200.degree. C. in a nitrile group-containing solvent selected from the group consisting of acetonitrile, propionitrile and ethyl cyanoacetate. Preferably, the CCl.sub.2 FCF.sub.2 Cl and chlorotrifluoroethylene are present in a mole ratio of from about 1:1 to about 3:1. respectively, to minimize the amount of high molecular weight species formed during the reaction. The telomers of this invention are useful for preparing non-flammable hydraulic fluids.

REFERENCES:
patent: 2462402 (1949-02-01), Joyce
patent: 2700661 (1955-01-01), Miller
patent: 2875253 (1959-02-01), Barnhart
patent: 3843734 (1974-10-01), Trebillon
patent: 4533762 (1985-08-01), Campbell et al.
patent: 4577044 (1986-03-01), Campbell et al.

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