354-64-3Relevant articles and documents
Preparation of trifluoroiodomethane via vapour-phase catalytic reaction between pentafluoroethane and iodine
Mao, Aiqin,Wang, Hua,Tan, Linhua,Nin, Xiangyang,Pan, Renming
, p. 4640 - 4642 (2013/07/19)
A new route for preparing C33I has been developed via a reaction between C2HF5 and I2. The influence of reaction temperature and active components of the catalysts on the amount of C33I was investigated. The result suggests that the selectivity of the C33I can be controlled by reaction conditions and active component of catalyst. The process for the formation of C33I and by-products is also discussed.
Preparation of trifluoroiodomethane via vapor-phase catalytic reaction between hexafluoropropylene oxide and iodine
Yang, Guang-Cheng,Jia, Xiao-Qing,Pan, Ren-Ming,Quan, Heng-Dao
experimental part, p. 985 - 988 (2010/02/28)
Based on our previous investigation on the reaction mechanism to produce difluorocarbene and subsequent CF3I starting with CHF3 and I2, a new route for preparing CF3I at a relative low temperature, 200 °C, has b
Investigation of CF2 carbene on the surface of activated charcoal in the synthesis of trifluoroiodomethane via vapor-phase catalytic reaction
Yang, Guang-Cheng,Lei, Shi,Pan, Ren-Ming,Quan, Heng-Dao
experimental part, p. 231 - 235 (2009/08/07)
This paper investigates the synthetic mechanism of trifluoroiodomethane (CF3I) in the reaction of trifluoromethane and iodine via vapor-phase catalytic reaction. It is suggested that CF2 carbene is the key intermediate and is formed in the pyrolysis process of CHF3 at high temperature. However, in pyrolysis of CHF3 under activated charcoal (AC) existing conditions, no C2F4 was detected. H2 and 2-methyl-2-butene could not trap the CF2 carbene. When treating the remained compounds on the used AC with H2, CH4 is formed on the process. It is proposed that CF2 carbene combines with AC strongly and transfers into CF3 radical on heat. In addition, it is found that the AC is not only the catalyst supporter to form CF3I, but also a co-catalyst to promote the formation of CF2 carbene and CF3 radical.
METHOD FOR PRETREATING AND REGENERATING CATALYSTS USED IN A PROCESS FOR MAKING FLUOROIODOALKANES
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Page/Page column 3-4, (2009/06/27)
A process for the preparation of a fluoroiodoalkane represented by the structural formula CF3(CF2)n—I, wherein n is 0 or 1. The process has the step of reacting a source of iodine with a compound represented by the structural formula CF3(CF2)n—Y, wherein Y is selected from H, Cl, Br and COOH and wherein n is 0 or 1. The reaction is carried out at a temperature from about 100° C. to about 750° C. and at a pressure from about 0.001 to about 100 atm for a contact time from about 0.001 second to about 300 hours in the presence a catalyst. The catalyst is subject to one or both of the following: (a) treating the catalyst prior to the reaction via contact with a gas selected from the group consisting of hydrogen fluoride, trifluoromethane, hydrogen, hydrogen iodide, iodine, fluorine, and oxygen, wherein the contact is carried out at a temperature and for a contact time sufficient to reduce the length of the induction period of the catalyst; and (b) treating the catalyst after the reaction via contact with a gas selected from the group consisting of hydrogen fluoride, hydrogen, fluorine, oxygen, or air at a temperature and for a contact time sufficient to regenerate the catalyst.
Catalyst for the synthesis of CF3I and CF3CF2I
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Page/Page column 2, (2008/12/08)
A process for the preparation of a fluoroiodoalkane compound represented by the formula: CF3(CF2)n—Y, wherein n is 0 or 1. The process includes contacting A, B and C. A is represented by the formula: CF3(CF2)n—Y, wherein n is 0 or 1, and Y is selected from the group consisting of: H, Cl, Br, and COOH. B is a source of iodine, and C is a catalyst containing elements with d1s1 configuration and lanthanide elements. The process occurs at a temperature, and for a contact time, sufficient to produce the fluoroiodoalkane compound.
Surface Chemistry and Radiation Chemistry of Trifluoroiodomethane (CF 3I) on Mo(110)
Nakayama, Nozomi,Ferrenz, Elizabeth E.,Ostling, Denise R.,Nichols, Andrea S.,Faulk, Janelle F.,Arumainayagam, Christopher R.
, p. 4080 - 4085 (2007/10/03)
The surface-induced and electron-induced chemistry of trifluoroiodomethane (CF3I), a potential replacement for chlorofluorocarbons (CFCs) and chlorofluorobromocarbons (halons), were investigated under ultrahigh vacuum conditions (p a?? 1 a?? 10-10 Torr) on Mo(110). Results of temperature-programmed desorption (TPD) experiments indicate that dissociative adsorption of CF3I leads only to nonselective decomposition on Mo(110), in contrast to reactions of CF3I on other metal surfaces. Desorption of CF3 radicals and atomic iodine was detected mass spectrometrically during low-energy (10-100 eV) electron irradiation of four monolayer thick films of CF3I condensed at 100 K. Results of postirradiation temperature-programmed desorption experiments were used to identify CF2I2, C2F5I, C 2F6, C2F4I2, and CFI3 as electron-induced reaction products of CF3I. Except for CFI 3, all of these electron-induced reaction products of CF3I have been previously identified in ?3-radiolysis studies, supporting our earlier claim that temperature-programmed desorption experiments conducted following low-energy electron irradiation of multilayer thin films provide an effective method to investigate the effects of high-energy radiation, including radical-radical reactions.
Kinetics of the photochemical reaction of C, Ind. Eng. Chem. Process Des. 2F5I and C4F9I with C2F4
Linyang, Zhang,Xiaoyu, Zhang,Wcihua, Yang,Xudong, Lou,Fuss
, p. 1158 - 1164 (2007/10/03)
Although the formal insertion of C2F4 into the CI bond of iodides is a chain reaction, we found quantum yields clearly below 1. We show that this is due to an inhibition reaction: the ,Ind. Eng. Chem. Process Des.ery rapid reaction of the radicals with molecular iodine, which accumulates during the reaction in amounts equal to the radical dimers. The corresponding kinetic model quantitati,Ind. Eng. Chem. Process Des.ely describes the quantum yields and product distributions, if we assume for the rate constants kn for the addition of the F(C, Ind. Eng. Chem. Process Des. 2F4)n radicals to C2F4 (in 107 cm3 mol-1 s-1 at 373 and 303 K, respecti,Ind. Eng. Chem. Process Des.ely): k1 = 19 and 3.6, k2 = 8.0 and 1.9, k3 = 1.6 (303 K). ,Ind. Eng. Chem. Process Des.CH ,Ind. Eng. Chem. Process Des.erlagsgesellschaft mbH, 1997.
Lewis acid catalyzed conjugated iodofluorination of fluoroolefins
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, (2008/06/13)
A process for the preparation of perfluoroalkyl iodides, especially perfluoroethyl iodide, by reaction of perfluorinated compounds which contain a carbon carbon double bond with ICl in HF solvent in the presence of Lewis acid catalysts. The compounds are used as telogens for the telomerization of tetrafluoroethylene to long-chain perfluoroalkyl iodides.
Facile conversion of perfluoroacyl fluorides into other acyl halides
Fukaya, Haruhiko,Matsumoto, Tomonori,Hayashi, Eiji,Hayakawa, Yoshio,Abe, Takashi
, p. 915 - 920 (2007/10/03)
Nine perfluoroacyl fluorides underwent halogen exchange when treated with anhydrous lithium halides to give acyl chlorides, bromides and iodides in high yields. The temperature dependence of this reaction is described. In the reaction with perfluorodiacyl fluoride, the diacyl halides possessing different acyl halide-groups were also produced. Of the alkaline metal salts used halogen exchange was successful only with lithium salts because of the interaction between lithium and fluorine.
