Direct one-step synthesis of CF 3 -I

Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing

Reexamination Certificate

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C570S123000, C570S170000

Reexamination Certificate

active

07071367

ABSTRACT:
The present invention provides a process for the preparation of trifluoromethyl iodide. The process includes the step of: contacting in a reactor a compound represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?CF3—Win-line-formulae description="In-line Formulae" end="tail"?and a compound represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?Z-Iin-line-formulae description="In-line Formulae" end="tail"?wherein W is selected from CF3, hydrogen and bromine; Z is selected from hydrogen, iodine and chlorine. The step of contacting is carried out, optionally in the presence of a catalyst and further optionally in the presence of air, at a temperature, pressure and for a length of time sufficient to produce the trifluoromethyl iodide.

REFERENCES:
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patent: 5892136 (1999-04-01), Nagasaki et al.
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Abstract: Tordeux,Process for the preparation of trifluoromethyl iodide, Rhone-Poulenc Chimie SA.
Abstract: Lee,Synthesis of CF3I by direct iodiniation of CF3COOH on solid catalyst, Waste Research Team, Energy & Environment Department, Taejou S. Korea, 2002.
Abstract: Su,A simple, novel method for the preparation of trifluoromethyl iodide and diiododifluoromethane, Journal of the Chemical Society, 1992.
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Abstract: Nagasaki,Study on a novel catalytic reaction and its mechanism for CF3I synthesis, Research Laboratory, Tosoh F-Tech, Inc., Yamaguchi, Japan, 2004.
Dhooge,Low Environmental Impact, High Performance Foam Blowing Agents Based on Iodofluorocarbons, Environmental Technology and Education Center, Albuquerque, New Mexico.
Nagasaki,The Development of a Novel Catalytic Technology for CF3I Manufacture, Research Laboratory, Tosoh F-Tech, Inc., Yamaguchi, Japan.
Glass,Gas Phase Combustion Suppression of Various Fuels by CF3I,Environmental Technology and Education Center, Albuquerque, New Mexico, 1999.

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