Preparation of trifluoroiodomethane via vapor-phase catalytic reaction between hexafluoropropylene oxide and iodine

Based on our previous investigation on the reaction mechanism to produce difluorocarbene and subsequent CF 3I starting with CHF 3 and I 2, a new route for preparing CF 3I at a relative low temperature, 200 °C, has been developed via a vapor-phase catalytic reaction between hexafluoropropylene oxide...

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Bibliographic Details
Published in:Journal of fluorine chemistry 2009-10, Vol.130 (10), p.985-988
Main Authors: Yang, Guang-Cheng, Jia, Xiao-Qing, Pan, Ren-Ming, Quan, Heng-Dao
Format: Article
Language:English
Subjects:
CF 2 carbene
CF 3I
Disproportionation
Hexafluoropropylene oxide
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Summary:Based on our previous investigation on the reaction mechanism to produce difluorocarbene and subsequent CF 3I starting with CHF 3 and I 2, a new route for preparing CF 3I at a relative low temperature, 200 °C, has been developed via a vapor-phase catalytic reaction between hexafluoropropylene oxide with I 2 in the presence of KF supported on activate charcoal as a catalyst. The influence of reaction temperature and reaction time on the amount of CF 3I was investigated. In the reaction process, coke-formation was suggested on the surface of catalysts by means of BET, XPS and TG-DTA analysis. The process for the formation of CF 3I and by-products is also discussed.
ISSN:0022-1139
1873-3328
DOI:10.1016/j.jfluchem.2009.06.010