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7635744 |
Trifluorovinyloxy monomers and polymers
Reactive monomers containing the trifluorovinyloxy group may be copolymerized to form polymers useful as membranes, especially polymer electrolyte membranes for fuel cells. The monomers have the...
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6702929 |
Purification of 1,1,1,3,3-pentafluorobutane
In the synthesis of 1,1,1,3,3-pentafluorobutane (R-365mfc), a mixture of R-365mfc and the impurity 1,1,1,3-tetrafluoro-2-butene (R-1354mzy) is purified and R-1354mzy is removed from the mixture by...
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6203671 |
Method of producing fluorinated compounds
A process for preparing a fluorinated product comprising: (a) reacting a molar excess of an aliphatic starting compound in liquid phase with fluorine in the presence of actinic radiation to produce...
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6179970 |
Process for the preparation of fluoro compounds from the corresponding amines
Compounds containing a primary amino group are converted into compounds containing a fluorine atom in place of the amino group by reaction of the amino compound with hydrogen fluoride and a...
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5944962 |
Process for photochlorination
An improvement in the process for the photochlorination of liquid mixtures of 2 to 6 carbon-containing aliphatic hydrofluorohalocarbons or hydrofluorocarbons and unsaturated hydrocarbons with...
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5688379 |
Process for preparing perfluoroalkyl bromides
The present invention provides a process for preparing a perfluoroalkyl bromide characterized by reacting a perfluoroalkyl iodide represented by the formula C n F 2n +1 I wherein n is an integer...
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5663543 |
Method for producing a polyfluoropropionyl halide
A method for producing a polyfluoropropionyl halide, which is characterized by oxidizing at least one dichloropentafluoropropane selected from 3,3-dichloro-1,1,1,2,2-pentafluoropropane and...
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5569782 |
Process for preparing polyfluorochlorocarbonyl chlorides and perfluorocarbonyl chlorides with addition of chlorine
A process for preparing polyfluorochloro- and perfluorocarbonyl chlorides, for example for preparing perfluoropropionyl chloride, chlorodifluoroacetyl chloride or trifluoroacetyl chloride, in which...
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5539059 |
Perfluorinated polyethers
This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.
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5486275 |
Nitrogen-containing perfluoroalkyl bromide and method for production thereof
A nitrogen-containing perfluoroalkyl bromide, a novel compound to the art, is represented by the formula, ##STR1## wherein Rf 1 and Rf 2 independently stand for a perfluoroalkyl group of one to...
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5446214 |
Cotelomers and a process for making them
A cotelomer of --CH 2 CF 2 -- (VDF) units and CF 2 CF(CF 3 )-- (HFP) units characterized in that the HEP units comprise at least 33% of all VDF and HFP units in the cotelomer combined. Also...
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5421971 |
Hydrochlorofluorocarbons and hydrofluorocarbons and methods for producing the same
A process for the preparation of compounds of the formula, F(CF 2 ) a CC1 2 CC1 2 (CF 2 ) b F where a and b are the same or different and are each an integer ≥1 (including the novel compound...
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5336377 |
Process for removing 2-chloro-1,1-difluoroethylene from 1,1,1,2-tetrafluoroethane and co-producing 2-chloro-1,1,1,2-tetrafluoroethane
2-Chloro-1,1-difluoroethylene (R-1122) is removed from 1,1,1,2-tetrafluoroethane (R-134a) by contacting the R-134a in the vapor phase with chlorine in the presence of ultraviolet light providing an...
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5262025 |
Telechelic telomers of chlorotrifluoroethylene and method for preparing same
Iodine terminated liquid telechelic telomers of chlorotrifluoroethylene (CTFE) containing an average of more than 1 CTFE unit per molecule are novel compounds. The telomers can be prepared by a...
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5259938 |
Process for omega-halo-perfluoro acid chlorides
A liquid phase process for preparing ω-haloperfluoroacid chlorides by the photo oxidation of polyfluoroalkyl mono- and di-chloromethanes in the presence of chlorine using light wavelengths greater...
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4929318 |
Process for preparing halogenated alkane
A halogenated alkane of the formula R--CHXY (I) wherein R is a trifluoromethyl group, a chlorodifluoromethyl group, a dichlorofluoromethyl...
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4820588 |
Shaped articles of polyfluoropolyethers having pendant perfluoroalkoxy groups
Normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, derivatives of the poly(perfluorooxyalkylene) compositions...
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4686024 |
Novel perfluoro chemicals and polyfluorinated compounds and process for production of the same
The present invention relates to novel perfluoro chemicals (PFC), particularly perfluorocyclic ethers and polyfluorinated compounds containing a few chlorine atoms and to a method for the...
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4684452 |
Process for the fluorination in liquid phase of unsaturated compounds
Process for the fluorination with elemental fluorine of fluorinated olefins, carried out in liquid phase using a perfluoropolyether as solvent, at temperatures comprised within the range of from...
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4675088 |
Synthesis of R.sub.f OTeF.sub.5
Pentafluorotellurium hypohalites are reacted with fluorocarbon iodides to form intermediate adducts which are thereafter decomposed to form fluorocarbons containing the TeF 5 O-- group.
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4643811 |
Photochemical process for the preparation of dichlorotrifluoroethoxy- and dichlorotrifluoroethlythiobenzene derivatives
A process for the preparation of 1,1-dichloro-2,2,2-trifluoroethoxybenzene derivatives or 1,1-dichloro-2,2,2-trifluoroethylthiobenzene derivatives. A 2,2,2-trifluoroethoxybenzene or a...
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4422913 |
Process for the production of 1,1,2-trichloro-2,2-difluoroethane
The compound 1,1,2-trichloro-2,2-difluoroethane is prepared in high yield by contacting 1,1-difluoroethylene and chlorine in the presence of a free radical initiator in a liquid reaction medium.
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4359371 |
Process for preparing bromine- and fluorine-containing halogenated hydrocarbons
A process for brominating fluorine-containing halogenated hydrocarbons is disclosed which comprises the step of reacting at least one halogenated fluorohydrocarbon compound of formula (I) ##STR1##...
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4178316 |
Method of preparing 1,1-difluoroethylene from acetylene
An improvement in a method of preparing 1,1-difluoroethylene from 1,1-difluoroethane by photochlorinating 1,1-difluoroethane to 1,1-difluoro-1-chloroethane and immediately thereafter reacting the...
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4060469 |
Preparation of 1,1,1-trifluoro-2,2-dichloroethane
1,1,1-trifluoro-2,2-dichloroethane [CF 3 CHCl 2 ] is prepared by contacting 1,1,1-trifluoro-2-chloroethane [CF 3 CH 2 Cl] with a less than molar equivalent of chlorine under conditions of...
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4052277 |
Process for preparing perfluorinated ethers
Process for preparing perfluorinated ethers by exposing perfluorocarbonyl compounds of the formula ##STR1## wherein R 1 and R 2 mean identical or different perfluoroalkyl radicals optionally...
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4049516 |
Photochemical process for the production of halogeno-alkanes
In a photochemical process, halogeno-alkanes are produced by irradiation of an ethylenic compound and of an excess amount of bromhydric acid, the reaction being advantageously carried out in the...
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4046656 |
Photochlorination process for methyl aromatic compounds
The rate of photochlorination of methyl aromatic compounds, such as toluene, cresol, xylene, toluenesulfonyl chloride, methylnaphthalene, diphenylmethane, etc., is increased when carried out in the...
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3816285 |
PHOTONITROSATION PROCESS USING SWIRL-FLOW PLASMA ARC RADIATION
Non-ionizing high intensity predominantly continuum light radiation having a source intensity of at least about 350 watts per square centimeter steradian when integrated throughout the entire...
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3674664 |
METHOD OF PREPARING CHLOROACETYL CHLORIDE
A method of preparing chloroacetyl chloride which comprises reacting by contacting in the vapor phase, at a temperature of about 20° to 350° C., vinylidene chloride with O 2 in the presence of a...
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3549698 |
FLUOROALKYL GEM-DIOLS
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3458416 |
PHOTOLYTIC CONDENSATION OF SATURATED HYDROCARBONS WITH POLYCHLORINATED OLEFINS
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3444249 |
2,2-DICHLORO - 1,1,3,3 - TETRAFLUOROPROPANE AND METHOD OF PREPARING SAME
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3377393 |
1, 1, 1, 2, 2-pentafluoro-3-chloro-3, 3-dibromopropane
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3317618 |
Process for coupling halogenated organic compounds and products thereof
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3255098 |
Photochemical preparation of 2, 2-chlorofluoropropane
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3211636 |
Preparation of monochlorofluoroalkanes
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3177260 |
New organic compound and process for making the same
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3142708 |
Method for preparing alpha, omega-dihaloalkanes
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3117068 |
Method of conducting exothermic gas phase chemical reactions
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3091648 |
Vinylidine fluoride derived cotelomer oils
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3089833 |
Preparation of highly fluorinated alkyl chlorides by irradiation with ultraviolet light of fluoroacyl chlorides alone or admixed with fluoroolefins
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3089911 |
Halogenated organic compounds
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3083240 |
Process for producing chlorobromomethanes
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3046304 |
Coupling of halogenated organic compounds
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2972638 |
Process for making fluorinated compounds
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2967810 |
Process for preparing highly fluorinated compounds
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2904603 |
2, 3-dibromo-1, 2, 3-trichloro-1, 1-difluoropropane
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2904601 |
1, 2-dibromo-3-chloro-1, 1, 3, 3-tetrafluoropropane
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2861032 |
Preparation of 1, 1-difluoro-1-chloroethane
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