125037-08-3Relevant academic research and scientific papers
Thermal Decomposition of Some Perfluoro- and Polyfluorodiacyl Peroxides
Chengxue, Zhao,Renmo, Zhou,Heqi, Pan,Xiangshan, Jin,Yangling, Qu,et al.
, p. 2009 - 2013 (1982)
Seven polyfluoroacyl peroxides were synthesized, some of them by a new procedure involving the direct interaction of an acyl fluoride with hydrogen peroxide.In the temperature range of 20-40 deg C, all these peroxides undergo first-order decomposition in dilute 1,1,2-trichloro-1,2,2-trifluoroethane (Freon-113) solutions (F-RF.Differing from other perfluoro or polyfluoro radicals, the perfluoro-α-isopropoxyethyl radicals (10) undergo substantial β scission to form perfluoroisopropyl radicals (11) during their lifetime.The ΔHexc. values for the perfluoroacyl peroxides are about 24 kcal mol-1, or about 5 kcal lower than that of the nonfluorinated diacyl peroxides (ca. 29 kcal mol-1).Apparently, the higher relative rates for 3 and 7 are caused by different factors.The latter peroxide (7) decomposes with a more favorable ΔSexc. term, whereas the former (3) decomposes with lower values of both ΔHexc. and ΔSexc..Thus, weakening of the peroxide bond by H bonding of the peroxide oxygen atom with the acidic ω-hydrogen atom seems to be implicated in the decomposition of 3.With a half-life of 81 min at 20 deg C, 3 may become a useful low-temperature initiator for free-radical reactions and polymerization.
Viscosity effects on the thermal decomposition of bis(perfluoro-2-N-propoxypropionyl) peroxide in dense carbon dioxide and fluorinated solvents
Clayton Bunyard,Kadla,Desimone
, p. 7199 - 7206 (2001)
The thermal decomposition of the free-radical initiator bis(perfluoro-2-N-propoxyprionyl) peroxide (BPPP) was studied in dense carbon dioxide and a series of fluorinated solvents. For the fluorinated solvents, the observed first-order decomposition rate constants, kobs, increased with decreasing solvent viscosity, suggesting a single-bond decomposition mechanism. The kobs values are comparatively larger in dense carbon dioxide and similar to the zero-viscosity rate constants extrapolated from the decomposition kinetics in the fluorinated solvents. The decomposition activation parameters demonstrate a compensation behavior of the activation enthalpy with the activation entropy upon change in solvent viscosity. Comparison of the change in activation parameter values upon change in solvent viscosity for BPPP with two additional initiators, acetyl peroxide (AP) and trifluoroacetyl peroxide (TFAP), further suggests that carbon dioxide exerts a very minimal influence on the decomposition mechanism of these initiators through solvent-cage effects.
SURFACE ACTIVE SUBSTANCES CONTAINING AN OLIGO(HEXAFLUOROPROPENE OXIDE) CHAIN AS A HYDROPHOBIC AND OLEOPHOBIC MOIETY
Ishikawa, Nobuo,Sasabe, Mikio
, p. 241 - 254 (1984)
Oil soluble surface active substances, (HFPO)n-Ar, where Ar is an aryl group and (HFPO)n is an oligo(hexafluoropropene oxide) group, n = 2 - 5, were prepared and tested for their surface activities in toluene or m-xylene.Addition of a small amount of (HFPO)4-6-Ar (0.2 - 0.5 wtpercent) was found to decrease remarkably the surface tension of these solvents (down to 12 - 14 dyncm-1 at 20 deg C).Water soluble surfactans (HFPO)n-Ar'SO3Na, where Ar' is an arylene group, were also prepared by sulfonation of (HFPO)n-Ar.Some of these subtances (n = 4 - 6) decreased the surface tension of water down to 16 dyncm-1 at 20 deg C in the concentration of 10-4 - 10-5 molel-1.
Application of perfluoro(2-propoxypropyl vinyl ether) (PPVE-2) in the synthesis of perfluoro(propyl vinyl ether) (PPVE-1)
Hintzer, Klaus,Hirschberg, Markus E.,Pajkert, Romana,R?schenthaler, Gerd-Volker,Smith, Sean M.,Tverdomed, Sergey N.
, (2020)
A novel preparative method for the conversion of n-C3F7OCF(CF3)CF2OCF = CF2 (PPVE-2) into n-C3F7OCF = CF2 (PPVE-1) is reported. It includes the catalytic oxidation of PPVE-2 with molecular oxygen to furnish a mixture of carbonyl fluorides which are subjected to alkaline hydrolysis resulting in a mixture of salts. Subsequent thermolysis of those salts give rise to an inseparable mixture of PPVE-1 and perfluoro-2-propoxypropanoyl fluoride. Treatment of this mixture with sodium carbonate allowed to obtain sodium perfluoro-2-propoxypropionate and to isolate PPVE-1. Thermolysis of this sodium salt produced an additional amount of PPVE-1, so that the total conversion of PPVE-2 into PPVE-1 is accomplished in good yields. The reaction conditions, the choice of reagent as well as the course of competitive reactions are discussed.
Development of technology of perfluoroethyl isopropyl ketone production
Fenichev,Babenko,Bispen,Moldavskii
, p. 376 - 386 (2013)
Synthesis of perfluoroethyl isopropyl ketone by an interaction of hexafluoropropene with perfluoropropionic acid fluoride or hexafluoropropene oxide was examined. Interchangeability of perfluoropropionic acid fluoride and hexafluoropropene oxide was demonstrated. The features of perfluoroethyl isopropyl ketone synthesis were studied in polar aprotic solvents on catalysts: alkali metal fluoride. A method for obtaining perfluoroethyl isopropyl ketone by direct catalytic reaction in a tubular reactor without use of solvents was suggested and investigated. The mechanism of interaction was considered. The main impurities resulting in obtaining perfluoroethyl isopropyl ketone were determined. The methods of cleaning perfluoroethyl isopropyl ketone were worked out.
One stone two birds: Degradation of persistent organic pollutants to a valuable industrial chemical production of pentafluoropropionyl fluoride from HFPO oligomers catalyzed by cesium fluoride in tetraglyme
Geng, Qian,Xiao, Xin,He, Guang-Rui,Yao, Su-Mei,Liang, Guang-Xin
, p. 1009 - 1012 (2016)
Hexafluoropropylene oxide (HFPO) oligomers are toxic, bioaccumulative, and persistent organic pollutants (POPs). Consuming the harmful chemicals to prevent them from releasing to nature is of serious significance as far as both natural environments and human health are concerned. In this study, investigation on degradation of HFPO oligomers to pentafluoropropionyl fluoride (PPF), a valuable industrial chemical, is reported. Different combinations of alkali metal fluoride in either diglyme or tetraglyme under both flask and batch autoclave conditions were examined. Under the optimal reaction conditions, HFPO oligomers (n?=?2–10) were completely degraded to PPF in over 90% yield. Reactions on 200?g scale were tested and no deduction of efficiency was observed, which indicates the potential for practical industrial application of this chemistry.
Hydrofluoroether compound and its preparation method and application (by machine translation)
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Paragraph 0066; 0068; 0069, (2019/04/26)
The invention belongs to the field of hydrofluoroether, in particular to a hydrofluoroether compound and its preparation method and application. Hydrofluoroether compound expressed by following formula: F [CF (CF3 ) CF2 O]x - RH ; Wherein x=2 - 7; RH =CH3 , C2 H5 , N - C3 H7 Or i - C3 H7 . The present invention provides a hydrofluoroether compound, only fluorine-containing this the only halogen element, not having to damage the ozone layer material, is an environment-friendly non-combustible heat transfer agent, solvent and cleaning agent. (by machine translation)
METHOD FOR PREPARING FLUORINE-CONTAINING VINYL ETHER
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Paragraph 0030-0031, (2014/10/29)
Provided is a method for preparing fluorine-containing vinyl ether. The method comprises: carrying out hydrolytic neutralization on a small molecular weight byproduct which is produced in the process of preparing perfluoropolyether or a perfluorinated surfactant by photooxidation of fluorine-containing olefin; and obtaining fluorine-containing vinyl ether by drying and cracking. The byproduct produced in the process of preparing perfluoropolyether or the perfluorinated surfactant is utilized, thereby solving the emission problem of industrial wastes, reducing environment pollution, and generating available fluorine-containing vinyl ether.
Catalytic synthesis of certain perfluorinated ketones and study of their structure by 19F NMR spectroscopy
Fenichev,Berenblit,Bispen,Lebedev,Moldavskii
, p. 1243 - 1251 (2014/02/14)
An efficient catalyst of a perfluorinated ketone synthesis of a high selectivity in the absence of solvent was proposed. Products of reaction of perfluorinated fluorides of various structures with tetrafluoroethylene and hexafluoropropylene in the presence of efficient catalysts without solvent were examined. The structure of the resulting products and their isomeric composition were identified by 19F NMR spectrscopy. Pleiades Publishing, Ltd., 2013.
PROCESS FOR PRODUCTION OF FLUORINATED SULFONYL FLUORIDES
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Page/Page column 27, (2010/11/08)
It is an object of the present invention to solve difficulty in production and to provide a process to obtain fluorinated sulfonyl fluoride compound having various molecular structures efficiently at a low cost. That is, the present invention provides a process which comprises reacting (FSO2-)nRA(-E-RB)m (1F) with fluorine in a liquid phase to form (FSO2-)nRAF(-EF-RBF)m (2), and decomposing this compound to obtain (FSO2-)nRAF(-EF1)m (3), provided that RA is a (n+m)valent organic group having at least two carbon atoms, RAF is a group having RA fluorinated, or the like, each of RB and RBF is a fluorinated monovalent organic group, or the like, E is -COOCH2- or the like, EF is -COOCF2- or the like, EF1 is -COF or the like, n is an integer of at least 2, and m is an integer of at least 1.
