20:;75-72-9Relevant articles and documents
EXPLOSIVE REACTIONS OF LIQUID MIXTURES OF CHLORINE TRIFLUORIDE WITH HYDROCARBONS AND HALOCARBONS
Brower, K. R.
, p. 333 - 350 (1986)
Combinations of liquid ClF3 with several hydrocarbons and halocarbons have been caused to explode by sudden mixing at various temperatures from 25 degC downward.The mixtures occasionally detonate.By fast recording of pressure, flame ionization, and carbon deposition it is found that mixtures derived from all of the fuels tested except perfluorohexane initiate in less than 1 ms at all temperatures down -70 degC.An ionic mechanism is proposed.Analysis of the explosion gases indicates that all chemical bonds including C-H are labilized owing to the extremely high temperature.Calorimetric measurements agree with calculated heats of explosion.
Heterogeneous catalyzed decomposition reactions of dichlorodifluoromethane in the presence of water on γ-alumina
Kemnitz,Kohne,Lieske
, p. 197 - 204 (1997)
The heterogeneous catalyzed decomposition of CCl2F2 (CFC-12) in the presence of water was investigated, employing γ-alumina as catalyst. The catalyzed hydrolysis reaction yields very high conversion degrees of CFC-12 in the first reaction stage. For a period of about 3 h there is a remarkable lack of balance between the amount of liberated HF and HCl owing to the uptake of HF by the oxide solid forming α-AlF3. Only after about 3 h does the heterogeneous solid/gas reaction come to an end and then the HCl and the HF balance is equal. With the increasing fluoride content of the solid phase, the decomposition degree of CFC-12 decreases to a stable value of about 60% with respect to liberated CO2. The conversion degree of CFC-12 seems to be higher but this is owing to the formation of CClF3 (CFC-13), which is nearly stable under the conditions used. Mechanistic explanations are given for the formation of CClF3 whether by dismutation reactions or owing to hydrofluorination reactions of CFC-12. Arguments are given about which mechanism might be the most probable. Furthermore, mechanistic hypotheses are concluded and discussed with respect to the processes at the catalyst surface on the basis of the experimental results.
PROCESSES FOR PRODUCING TRIFLUOROIODOMETHANE
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Paragraph 0053-0055, (2020/03/09)
The present disclosure provides a gas-phase process for producing trifluoroiodomethane, the process comprising providing a reactant stream comprising hydrogen iodide and trifluoroacetyl halide selected from the group consisting of trifluoroacetyl chloride, trifluoroacetyl fluoride, trifluoroacetyl bromide, and combinations thereof, and reacting the reactant stream in the presence of a catalyst at a temperature from about 200° C. to about 600° C. to produce a product stream comprising the trifluoroiodomethane.
Cu-catalyzed chlorotrifluoromethylation of alkenes with CF3SO2Cl
Zhang, Wei,Lin, Jin-Hong,Xiao, Ji-Chang
supporting information, p. 25 - 31 (2018/09/18)
Although CF3SO2Cl is an efficient chlorotrifluoromethylation reagent, an expensive transition metal complex usually has to be used. We found that CuCl2-catalyzed chlorotrifluoromethylation of alkenes with CF3SO2Cl occurred smoothly under mild conditions. A wide substrate scope and good functional group compatibility were observed.
One-Step Process for Hexafluoro-2-Butene
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Paragraph 0033; 0034, (2016/02/18)
Disclosed is a one step process for making of 1,1,1,4,4,4-hexafluoro-2-butene. More specifically, the present invention provides a process for making hexafluoro-2-butene, continuously, from 2-chloro-3,3,3-trifluoropronene using Fe2O3/NiO impregnated carbon catalyst at 600° to 650° C.
PROCESS FOR 1-CHLORO-3,3,3-TRIFLUOROPROPENE FROM TRIFLUOROMETHANE
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Paragraph 0056; 0057, (2015/02/25)
The present invention provides routes for making 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) from commercially available raw materials. More specifically, this invention provides routes for HCFO-1233zd from inexpensive and commercially available trifluoromethane (HFC-23).
Chemical ionization using CF3+: Efficient detection of small alkanes and fluorocarbons
Dehon, Christophe,Lemaire, Jo?l,Heninger, Michel,Chaput, Aurélie,Mestdagh, Hélène
experimental part, p. 113 - 119 (2011/08/21)
The trifluoromethyl ion CF3+ is evaluated as a chemical ionization (CI) precursor in a compact Fourier Transform Ion Cyclotron Resonance (FTICR) mass spectrometer. It reacts with alkanes by hydride abstraction allowing characterization and quantification of alkanes up to C4 and cyclic. With larger alkanes fragmentation occurs. Fluorocarbons react by fluoride abstraction. Rate coefficients have been measured for reaction with alkanes, fluoroalkanes, chlorofluoroalkanes as well as several common VOCs. Use of CF3+ for trace analysis in air has been tested on an air sample containing traces of acetone, toluene, benzene and cyclohexane. The results are consistent with those obtained with H3O+ precursor and allow additional cyclohexane quantification.
Methane and methyl chloride as selective reducing agent in the transformation of hydrochlorofluorocarbons or chlorofluorocarbons to hydrofluorocarbons
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Page/Page column 6, (2008/06/13)
A gas phase reaction process for producing a hydrofluorocarbon from a hydrochlorofluorocarbon or chlorofluorocarbon reactant by contacting, in the presence of a catalyst, the hydrochlorofluorocarbon or chlorofluorocarbon reactant with a reducing agent selected from methane, methyl chloride and mixtures thereof, to produce the hydrofluorocarbon.
Method for the preparation of high surface area metal fluorides
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Page/Page column 8, (2010/10/20)
The present invention is related to a method for preparing an amorphous metal fluoride of the formula MX+FX-δ comprising the steps of a) providing a precursor, whereby the precursor comprises a structure having a formula of Mx+F(x-δ)-yBy; and b) reacting the precursor with a fluorinating agent generating the amorphous metal flouride having a formula of Mx+Fx-δ, whereby M is selected from the group comprising metals of the second, third and fourth main group and any subgroup of the periodic table, B is a coordinately bound group; x is any integer of 2 or 3; y is any integer between 1 and 3; δ is 0 to 0.1; and x?δ>y.
Nitrogen trifluoride as an oxidative co-reagent in high temperature vapor phase hydrofluorinations
Belter, Randolph K.,Sweval, Mark S.,Iikubo, Yuichi
, p. 816 - 820 (2008/03/27)
Nitrogen trifluoride (NF3) has proven to be a useful additive in high temperature vapor phase hydrofluorination reactions of chlorocarbons. The activity of chromium-based catalysts is maintained by introducing a co-stream of NF3 into the reagent chlorocarbon and HF stream. NF3 is a desirable additive instead of O2 as there is no water generation due to its use.
