- Methyl hypofluorite (MeOF) reactions with various fluoroolefins
-
The reaction of methyl hypofluorite (MeOF) with certain fluoroolefins, such as CF2=CF2, CF2=CFCF3, CF2=CFOCF3, CF2=CFOMe, CF2=CClF, CF2=CHF, CF2=CH2, CHF=CH2, CF2=CFCF=CF2, occurred in CD3CN or in the presence of NaF. Using neat MeOF in the presence of NaF was a novel method and gave good results. We observed that when more than three fluorine atoms are bonded to the C-C double bond, the addition products were obtained in mostly good yields.
- Suzuta, Tetsuya,Abe, Takashi,Sekiya, Akira
-
-
Read Online
- PROCESS FOR THE PRODUCTION OF PERFLUORINATED ALKYLVINYLETHERS
-
The present invention relates to a process for producing a perfluorovinylether A-CRf=CF-O-B, comprising the steps of : - contacting at least one α,β-dihaloperfluoro ether represented by the formula A-CRfX-CFX-O-B with zero valent zinc in the presence of an organic nitrogen compound selected in the group consisting of: tertiary aliphatic amines; aromatic heterocycles comprising nitrogen as heteroatom; and guanidines; to form a mixture comprising perfluorovinylether, and - recovering the perfluorovinylether from the mixture, wherein : X is selected from the group consisting of chlorine, bromine, or iodine, Rf is fluorine or is a group of formula –OR'f, where R'f is selected from the group consisting of linear and branched chain perfluoroalkyl radicals A is selected from the group consisting of fluorine and linear and branched chain perfluoroalkyl radicals, and B is selected from the group consisting of linear and branched chain perfluoroalkyl radicals, wherein A and B can contain oxygen and sulfur heteroatoms configured in functional groups selected from ether, ester, ketone, and sulfonyl fluoride, and wherein A and B can be bonded together forming a ring.
- -
-
Page/Page column 8
(2019/07/19)
-
- Method for preparing perfluoromethyl vinyl ether
-
The invention provides a three-step method for preparing perfluoromethyl vinyl ether. The method uses 2-methoxypropanol and perfluoro-2-methoxypropionyl fluoride as raw materials, and conducts an esterification reaction, a fluorination reaction and a thermal decomposition reaction to obtain the fluoromethyl vinyl ether. The method provided by the invention is stable in reaction conditions, easy for industrialized continuous production; and the product perfluoromethyl vinyl ether has high yield and high purity.
- -
-
Page/Page column 6-10
(2019/03/26)
-
- METHOD FOR THE MANUFACTURE OF PERFLUOROVINYLETHERS
-
A method for the hydrodehalogenation of a halofluoroether (HaloFE) having general formula (l-A) or (l-B): (I-A) RfO-CRf'X-CRf"Rf"'X' wherein - Rf represents a C1-C6 perfluoroalkyl or a C1-C6 perfluorooxyalkyl group; - Rf', Rf" and Rf'", equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoroalkyl or C1-C5 perfluorooxyalkyl groups; X and X', equal or different from each other, are independently selected from CI, Br or I; (l-B) wherein: - Rf* and Rf*', equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl or C1-C3 perfluorooxyalkyl groups; - Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X' are as above defined; is herein disclosed, the method comprising contacting said halofluoroether (HaloFE) with hydrogen in the presence of a catalyst comprising at least one transition metal of group VI 11 B and at least one alkali metal of group IA.
- -
-
Paragraph 0058; 0059; 0060; 0061; 0062
(2018/02/28)
-
- METHOD FOR THE MANUFACTURE OF PERFLUOROVINYLETHERS
-
The invention pertains to a method for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HaloFE) having general formula (l-A) or RfO-CRf'X-CRf"Rf"'X' (l-A) wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf', Rf" and Rf'", equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X', equal or different from each other, are independently selected from CI, Br or I; (l-B) wherein Rf* and Rf*', equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X' are as above defined; said method comprising contacting said halofluoroether (HaloFE) with hydrogen in the presence of a catalyst comprising at least one transition metal (M) of group VI 11 B and tin.
- -
-
Paragraph 0063-0065; 0069-0071; 0072-0074; 0075-0076
(2018/03/28)
-
- Methods for producing perfluoromethyl vinyl ether and intermediate thereof
-
The invention discloses a method for producing perfluorinated-2-methoxy propionyl fluorine. In the presence of a polar aprotic solvent, under the action of a main catalyst alkali metal fluoride and a phase transfer catalyst, carbonyl fluoride and hexafluoropropylene oxide react to prepare perfluorinated-2-methoxy propionyl fluorine. The invention further provides a method for preparing perfluoromethyl vinyl ether from perfluorinated-2-methoxy propionyl fluorine. According to the methods, the reaction yield is high, the prepared products are high in purity, operation is easy, and environment friendliness is achieved.
- -
-
Paragraph 0035; 0036
(2017/05/11)
-
- Perfluoromethyl vinyl ether preparation method
-
The present invention discloses a perfluoromethyl vinyl ether preparation method, wherein a trifluoromethoxy salt CF3OM is adopted as a raw material, and reacts with chlorotrifluoroethylene in the presence of a phase transfer agent to prepare the perfluoromethyl vinyl ether. The present invention further discloses a preparation method of the perfluoromethyl vinyl ether. According to the present invention, the preparation method has characteristics of high product yield, low risk factor, safety and environmental protection, and is suitable for industrial production.
- -
-
Paragraph 0026; 0027
(2016/10/07)
-
- Method for Preparing Fluorine-Containing Vinyl Ether
-
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.
- -
-
Paragraph 0033-0035
(2014/11/13)
-
- Method for manufacturing perfluorovinylethers
-
The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): [in-line-formulae]RfO—CRf′X—CRf″Rf′″X″??(I-A)[/in-line-formulae] wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf′, Rf″ and Rf′″, equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X′, equal or different from each other, are independently chosen among Cl, Br or I; wherein Rf* and Rf*′, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X′ are as above defined; said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising palladium and at least one transition metal (M) selected from the group consisting of the metals of group VIIIB, other than palladium, and of group IB.
- -
-
Paragraph 0060-0063; 0067-0069
(2014/01/07)
-
- METHOD FOR MANUFACTURING PERFLUOROVINYLETHERS
-
The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (l-A) or (l-B): RfO-CRf'X-CRf"Rf"'X' (l-A) wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf', Rf" and Rf'", equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X', equal or different from each other, are independently chosen among CI, Br or I; wherein Rf* and Rf*', equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X' are as above defined; said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising palladium and at least one transition metal (M) selected from the group consisting of the metals of group VIIIB, other than palladium, and of group IB.
- -
-
Page/Page column 11-12
(2012/08/27)
-
- 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.
- -
-
-
- METHOD FOR MANUFACTURING PERFLUOROVINYLETHERS
-
The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): RfO-CRf'X-CRf''Rf'''X' (I-A) wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf', Rf" and Rf"' equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X', equal or different from each other, are independently chosen among Cl, Br or I; formula (I-B); wherein Rf* and Rf*', equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X' are as above defined; said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising at least one transition metal of group VIII B at a temperature of at most 340°C.
- -
-
Page/Page column 8-9
(2010/01/07)
-
- Pyrolytic decarboxylation of some derivatives of perfluorinated mono- and dicarboxylic acids
-
Pathways of pyrolysis of perfluorinated carboxylic acids are considered in relation to the structure of the acids and reaction conditions. The reaction mechanism is discussed.
- Lebedev,Berenblit,Starobin,Gubanov
-
p. 1640 - 1645
(2007/10/03)
-
- INVESTIGATIONS IN THE REGION OF INDUSTRIAL FLUORINATED COMPOUNDS
-
The synthesis and properties of ozone-friendly fluorohydrocarbons, fluoroolefins, and fluorinated compounds with functional groups (acids, alcohols, esters, and others), used for the creation of effective surfactants, ion-exchange membranes for various purposes, heat-resistant oils, and greases, were investigated.A technology was developed for the production of highly pure fluorinated compounds for microelectronics, fiber optics, and medicine.
- Maksimov, B. N.
-
p. 1935 - 1940
(2007/10/03)
-
- THERMOGRAPHIC INVESTIGATION OF THE DECARBOXYLATION OF SALTS OF PERFLUORINATED CARBOXYLIC ACIDS
-
The thermal stability of the salts of metals of the first group with perfluorinated carboxylic acids was investigated by a differential thermal method.The calculations of the A, E, and n parameters were made on a Minsk 32 computer.For the investigated series of salts the reactions has first-order kinetics.In the case of the pyrolysis of the salts of perfluoromethoxypropionic acid the yield of perfluoromethyl vinyl ether depends not only on the cation of the salt but is determined to a significant degree by the structural features of the carbon skeleton.Tetrafluoroethylene and perfluoromethoxypropionyl fluoride were detected as side products.A mechanism for the process, which explains the formation of the main reaction products, was proposed and confirmed experimentally.
- Gubanov, V. A.,Zevakin, I. A.,Gurari, V. E.,Tumanova, A. V.,Dolgopol'skii, I. M.,et al.
-
p. 1409 - 1412
(2007/10/02)
-