Synthesis of perfluoroalkyl iodides

Details Synthesis of perfluoroalkyl iodides Synthesis of perfluoroalkyl iodides

1993-01-13

1993-12-07

Lone, Werren B.

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

Organic compounds

Halogen containing

570123, 570124, 570134, 570138, C07C 1704, C07C 21185

Patent

active

052685160

ABSTRACT:
The invention relates to a continuous process for the preparation of perfluoroalkyl iodides containing from 4 to 12 carbon atoms by thermal telomerization of tetrafluoroethylene by pentafluoroethyl iodide or heptafluoroisopropyl iodide in a tubular reactor.
According to the invention, 30 to 75% of the tetrafluoroethylene is supplied at the head of the reactor; the remainder is introduced at a point in the reactor located between the 2/5 and 3/4 of the length of the tube.
The proportion of undesirable heavy telomers is reduced in this way.

REFERENCES:
patent: 3219712 (1965-11-01), Hamptschein et al.
patent: 3226449 (1965-12-01), Blanchard et al.
patent: 3404189 (1968-11-01), Blochl
patent: 3557224 (1971-01-01), Jaeger
patent: 3883604 (1975-05-01), Rudolph et al.
patent: 3956412 (1976-05-01), Knell
patent: 4067916 (1978-01-01), Jaeger
patent: 5015790 (1991-05-01), Hung
European Search Report (Rapport de Recherche) dated Oct. 7, 1992.

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