- Preparation method of hexafluoropropylene oxide (by machine translation)
-
The application belongs to, the technical field of inorganic chemistry, and particularly relates to a preparation method of. hexafluoropropylene oxide, and the preparation method of hexafluoropropene oxide comprises the, following steps of: reacting a nitrogen oxide, compound, with hexafluoropropylene as a,raw material to obtain hexafluoropropylene oxide as a raw material. (by machine translation)
- -
-
Paragraph 0033-0050
(2019/12/31)
-
- METHOD FOR PRODUCING FLUORINE-CONTAINING EPOXY COMPOUND
-
PROBLEM TO BE SOLVED: To provide a method for producing a fluorine-containing epoxy compound that makes it possible to obtain a target product in high yield without conducting the reaction in a minute space necessarily. SOLUTION: The present invention provides a method for producing a fluorine-containing epoxy compound represented by formula (1), including step A1 of reacting a fluorine-containing olefin compound with sodium hypochlorite penta-hydrate, or step A2 of reacting a fluorine-containing olefin compound with hypohalite in the presence of an acid acceptor such as a basic salt having 4-12 pKa (25°C) [R1-R3 are H, F, Cl or Rf; Rf is (halo) fluoroalkyl group]. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
- -
-
Paragraph 0099; 0100; 0101; 0102; 0103
(2019/03/15)
-
- Method for synthesis of hexafluoropropylene oxide by use of two-liquid-phase buffer solution method under atmospheric pressure
-
The present invention discloses a method for synthesis of hexafluoropropylene oxide by use of a two-liquid-phase buffer solution method under atmospheric pressure, and belongs to the technical field of fluorine chemical industry, and the method is as follows: under atmospheric pressure, sodium hypochlorite is used as an oxidant, a buffer system is used for assisting reaction, C12-C18 alkyl trimethyl ammonium bromide is used as a catalyst, and the two-liquid-phase method is used for synthesis of hexafluoropropylene oxide, the specific steps of the two-liquid-phase method are as follows: under atmospheric pressure, the buffer system is dissolved in an aqueous sodium hypochlorite solution, and then the C12-C18 alkyl trimethyl ammonium bromide and toluene are added into the aqueous sodium hypochlorite solution to form a mixture. The method is mild in reaction conditions, safe and reliable in production, low in power consumption, simple in process, low in production cost, better in environmental protection property, and high in economic efficiency.
- -
-
Paragraph 0055; 0056
(2016/11/28)
-
- Prepare hexafluoropropylene oxide's device under gentle condition in succession
-
The utility model discloses a prepare hexafluoropropylene oxide's device under gentle condition in succession, including premixer, peristaltic pump, gaseous storage tank, spiral reactor, liquid separation jar and gas collection jar, the other end of peristaltic pump pass through the three -way valve with gaseous storage tank and spiral reactor's matter entrance connects, the export of spiral reactor's material through the three -way valve with liquid separation jar and gas collection jar are connected. Compared with the prior art, the utility model discloses utilize spiral pipe continuous reactor to realize continuous production hexafluoropropylene oxide under gentle condition, spiral reactor had both done benefit to the gas -liquid intensive mixing, did benefit to gas -liquid quickly separating again, and the conversion rate of reaction is high, and the selectivity is good.
- -
-
Paragraph 0021; 0022; 0023; 0024
(2016/12/16)
-
- A process for the preparation of hexafluoropropylene oxide
-
The invention discloses a preparation method for hexafluoropropylene oxide. Hexafluoropropylene is used for preparing hexafluoropropylene oxide through a molecular oxygen liquid-phase oxidation method. A hexafluoropropylene solvent used in the molecular oxygen liquid-phase oxidation method is mixture of perfluoropolyethers and fluorocarbon, and a metallic oxide catalyst is added in a reaction process of the molecular oxygen liquid-phase oxidation method. The preparation method has the advantages that the metallic oxide catalyst is added so that temperature required by a reaction is reduced, solubility of hexafluoropropylene in the solvent is greatly increased, and reaction selectivity is improved.
- -
-
Paragraph 0028-0029
(2017/03/18)
-
- METHOD FOR PRODUCING HEXAFLUOROPROPYLENE OXIDE
-
The present invention provides a novel method for producing hexafluoropropylene oxide, which can attain a high HFPO selectivity without using a phase transfer catalyst. Hexafluoropropylene (HFP), a water-soluble and aprotic organic solvent, and an aqueous solution of an oxidizing agent are introduced into a small space, thereby bringing into contact with each other and reacting hexafluoropropylene with the oxidizing agent to obtain hexafluoropropylene oxide (HFPO).
- -
-
Page/Page column 4-5
(2012/02/01)
-
- Oxidation of hexafluoropropylene with oxygen to hexafluoropropylene oxide
-
A method for pressure oxidation of hexafluoropropylene (HFP) with oxygen to hexafluoropropylene oxide (HFPO) has been presented. The oxidation was carried out in a periodically operated reactor. The influence of temperature, the nature of the solvent, and the molar ratio of HFP/O2 on the course of oxidation was investigated during the preliminary studies. The magnitudes describing the process were the conversion of HFP, the selectivity of transformation to HFPO in relation to HFP consumed, and the yield of HFPO in relation to the initial amount of HFP. The optimisation of the technological parameters of oxidation, temperature, HFP/O2 molar ratio, and the reaction time was performed by the application of a statistical experimental design method. The function describing the process was the yield of HFPO.
- Wroblewska, Agnieszka,Milchert, Eugeniusz,Meissner, Egbert
-
body text
p. 272 - 277
(2010/04/28)
-
- GASEOUS DIELECTRICS WITH LOW GLOBAL WARMING POTENTIALS
-
A dielectric gaseous compound which exhibits the following properties: a boiling point in the range between about ?20° C. to about ?273° C.; non-ozone depleting; a GWP less than about 22,200; chemical stability, as measured by a negative standard enthalpy of formation (dHf0); a toxicity level such that when the dielectric gas leaks, the effective diluted concentration does not exceed its PEL; and a dielectric strength greater than air.
- -
-
-
- PROCESS FOR PRODUCTION OF HEXAFLUOROPROPYLENE OXIDE
-
There is provided a process for producing hexafluoropropylene oxide which is novel and capable of achieving a higher yield. An organic phase comprising hexafluoropropylene (HFP) in an organic solvent and an aqueous phase comprising an oxygen-containing oxidizing agent in water are supplied to a small space (or microspace), preferably together with a phase transfer catalyst. The organic phase and the aqueous phase are contacted with each other in the small space, thereby reacting hexafluoropropylene (HFP) with the oxygen-containing oxidizing agent, preferably by an action of the phase transfer catalyst to give hexafluoropropylene oxide (HFPO). After the reaction, the organic phase and the aqueous phase are taken out from the small space to obtain an organic phase comprising the hexafluoropropylene oxide (HFPO).
- -
-
Page/Page column 8-9
(2009/09/05)
-
- Manufacturing method of hexafluoropropylene oxide with high yield
-
The present invention relates to a method for preparing hexafluoropropylene oxide with high yield, and particularly to a method for preparing hexafluoropropylene oxide comprising the step of performing a two-phase interfacial reaction between an organic phase containing hexafluoropropylene and an aqueous phase containing a hypochlorite oxidant in the presence of a phase-transfer catalyst and a non-ionic surfactant to improve the degree of emulsification and dispersion of the organic phase and to increase the contact interfacial area, thereby increasing the efficiency and the yield of the reaction.
- -
-
Page/Page column 2-3
(2008/06/13)
-
- Process for producing hexafluoropropylene oxide
-
A process for producing hexafluoropropylene oxide, which comprises contacting a reaction product containing hexafluoropropylene oxide obtained by reacting hexafluoropropylene with oxygen, with at least one adsorbent selected from activated carbon and the following metal oxides, wherein the metal oxides are oxides of at least one metal selected from Groups 1 and 2 of the Periodic Table, Zr and Si.
- -
-
Page/Page column 4 - 5
(2008/06/13)
-
- Kinetics and mechanism of the thermal gas-phase reaction between NO 2 and perfluoropropene
-
The reaction of NO2 with perfluoropropene (C3F 6) has been studied at 413.1, 421.0 and 432.8 K, using a conventional static system. The initial pressure of NO2 was varied between 43.6 and 204.0 Torr and that of C3F6 between 10.2 and 108.5 Torr. Several experiments were made adding CF4, varying its pressure from 338.8 to 433.6 Torr. Four products were observed: NO and perfluoropropene oxide (PFPO), formed in equivalent amounts, CF3CF(NO 2)CF2NO2 and CF3C(O)CF 2NO2. The relation R = [PFPO]/([CF3CF(NO 2)CF2NO2] + [CF3C(O)CF 2NO2]) increases with temperature and decreases as the concentration of NO2 and the total pressure M increase. The yields of PFPO, based on the amount of C3F6 consumed, varied between 63 and 89% and those of CF3CF(NO2)CF 2NO2 between 0.33 and 0.08%. Increasing the temperature, the yields of CF3C(O)CF2NO2 decreased from 0.04 to 0.01%. The reaction is homogenous and the consumption rate of perfluoropropene, -d[C3F6]/dt = k1 [C 3F6][NO2], is independent of the total pressure. The following mechanism is postulated to explain the experimental results: 1) C3F6 + NO2 → CF 3C?FCF2NO2, 2) CF 3C?FCF2NO2 → PFPO + NO, 3) CF3C?FCF2NO2 +NO2 + M → CF3CF(NO2)CF2NO2 + M, 4) CF3C?FCF2NO2 + NO2 → CF3C(O)CF2NO2 + FNO. k1 = (4.57 ± 1.4) × 106 exp(-(15.44 ± 1.2) kcal mol-1/RT) dm3 mol-1 s-1. The value of k2, the rate constant for the unimolecular dissociation of the radical CF3C?FCF2NO2, was found to be of order of 1014 s-1.
- Romano, Rosana M.,Czarnowski, Joanna
-
p. 575 - 597
(2007/10/03)
-
- Effect of temperature on low-temperature liquid-phase oxidation of hexafluoropropene by molecular oxygen
-
The effect of temperature on the rate of consumption of hexafluoropropylene and the rates of formation of the products (perfluoropolyether polyperoxide, trifluoroacetyl fluoride, carbonyl fluoride, and hexafluoropropene oxide) over the temperature range 213-303 K at various oxygen pressures and a constant initiation rate was studied. The apparent activation energies were calculated.
- Shapovalov
-
p. 1338 - 1340
(2007/10/03)
-
- On the Possibility of the Formation of Carbonyl Compounds in Reactions Involving Peroxide Radicals
-
It is shown that, for low-temperature liquid-phase oxidation of hexafluoropropene by molecular oxygen, the conventionally accepted mechanism of formation of carbonyl compounds, via the fragmentation of alkoxy radicals, is not confirmed experimentally; the most likely alternative is an anomalous reaction path involving a terminationless interaction of peroxide radicals.
- Shapovalov, V. V.,Poluektov, V. A.,Ryabinin, N. A.
-
p. 552 - 555
(2007/10/02)
-
- Process for preparation of perfluoropropane oxide
-
An improved process for the preparation of perfluoropropene oxide by the reaction of perfluoropropene with hydrogen peroxide in an aqueous alkaline medium is described. The improved process is characterized by carrying out the reaction in the presence of a phase-transfer catalyst selected from the group consisting of quaternary ammonium salts, phosphonium salts, and lipophilic complexing agents for cations, and by carrying out the addition of an aqueous solution of an inorganic base to the reaction mixture gradually so that a constant reaction temperature between -10° C. and -60° C. is maintained.
- -
-
-
- SYNTHESIS OF PENTAFLUOROSELENIUMOXIDE FLUOROCARBONS
-
The reaction of xenon bis-pentafluoroseleniumoxide, Xe(OSeF5)5, with the haloolefins, CF2=CF2, CF3CF=CF2, CF2=CFCl, and CF2=CFH, results in the low to moderate yield addition of two SeF5O- groups to the double bond.These are the first examples of this type of addition.From c-C5F8 and the above olefins these same reactions also gave as products, C2F5OSeF5, n-C3F7OSeF5, c-C5F9OSeF5, and SeF5OCF2COCl in higher yields than the bis SeF5O- compounds.Surprisingly, those olefins capable of forming thermally stable epoxides, i.e.C3F6 and c-C5F8, were found to produce significant yields of the corresponding epoxides as a by-product in these reactions, while the remaining olefins gave significant amounts of acid fluorides instead.Characterizing data are presented for all of these new RfOSeF5 compounds.
- Schack, Carl J.,Christe, Karl O.
-
p. 163 - 172
(2007/10/02)
-
- β-Substituted polyfluoropropionate salts and derivatives
-
β-substituted polyfluoropropionate salts, derivatives and copolymers and processes for the preparation thereof.
- -
-
-
- Fluorine containing ketones
-
By reaction of a perfluoro vinyl ether with a perfluoro carbonic acid fluoride perfluorinated ketones of the formula R1 --O--CF(CF3)--CO--R2 with at least 13 carbon atoms may be obtained. These ketones may be used as inert solvents of high boiling point. The reaction is catalyzed by cesium fluoride and carried out in an aprotic polar solvent.
- -
-
-
