Synthesis of n-perfluorooctyl bromide

Details Synthesis of n-perfluorooctyl bromide Synthesis of n-perfluorooctyl bromide

1995-05-30

1996-08-13

Siegel, Alan

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

Organic compounds

Halogen containing

C07C 1907

Patent

active

055457762

ABSTRACT:
The invention relates to the preparation of n-perfluorooctyl bromide. The continuous process according to the invention consists in reacting bromine with 1-hydroheptadecafluoro-n-octane in the gaseous phase, at a temperature between 450.degree. and 520.degree. C. in a Br.sub.2 /C.sub.8 F.sub.17 H mole ratio which can be from 0.2 to 5 and with a contact time between 2 and 240 seconds.
The C.sub.8 F.sub.17 Br selectivity is almost complete and information of toxic sub-products like perfluoroisobutene is avoided.

REFERENCES:
patent: 3456024 (1969-07-01), Loree
patent: 5057633 (1991-10-01), Drivon et al.
patent: 5073651 (1991-12-01), Raab
McBee et al Indust & Eng Chem. vol. 39, No. 3, Mar. 1947, pp. 420, 421.

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