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| Number | Title | Issue Date |
| 7943015 | Use of copolymers of perfluoro(alkyl vinyl ether) for photochemical reactions A photochemical reaction apparatus including a reactor and a light source situated so that light from the light source is directed through a portion of the reactor wall is disclosed. The apparatus is characterized by the portion of the reaction wall comprising a cop... | 05/17/2011 |
| 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 contacting the mixture with 1-5 mols of chlorine for each ... | 03/09/2004 |
| 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 a product mixture containing a fluorinated product having... | 03/20/2001 |
| 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 nitrosating reagent under the influence of ultrasound or microwav... | 01/30/2001 |
| 6156163 | Reactant, compound and process for the perfluoroalkylation of the nucleophile, and the derivatives obtained A reagent comprising a compound of formula (I): Rf --M(X) (Z)n --Y--R, wherein R is a hydrocarbon radical advantageously having at most 10 carbon atoms and being selected from alkyls and aryls; Rf is a radical of formula I... | 12/05/2000 |
| 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 ultraviolet light is disclosed. The improvement comprises using... | 08/31/1999 |
| 5750010 | Process for photochlorination An improvement in the process for the photochlorination of liquid mixtures of 1,1-dichloro-1-fluoroethane and unsaturated hydrocarbons with ultraviolet light is disclosed. The improvement comprises using ultraviolet light emitted from an ultraviolet light... | 05/12/1998 |
| 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 Cn F2n+1 I wherein n is an integer of 6 to 10 with bromine in a light-transm... | 11/18/1997 |
| 5674949 | Liquid-phase fluorination This invention pertains to a method for liquid-phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 10/07/1997 |
| 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 1,3-dichloro-1,1,2,2,3-pentafluoropropane by oxygen under irradiat... | 09/02/1997 |
| 5571870 | Liquid phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 11/05/1996 |
| 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 starting materials are employed which have a CHCl2 | 10/29/1996 |
| 5539059 | Perfluorinated polyethers This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.... | 07/23/1996 |
| 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 Rf1 and Rf2 independently stand for a perfluoroalkyl group of one to five carbon atoms, provided that Rf | 01/23/1996 |
| 5461117 | Liquid phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 10/24/1995 |
| 5446214 | Cotelomers and a process for making them A cotelomer of --CH2 CF2 -- (VDF) units and CF2 CF(CF3)-- (HFP) units characterized in that the HEP units comprise at least 33% of all VDF and HFP units in the cotelomer combined. Also claimed is a process for p... | 08/29/1995 |
| 5421971 | Hydrochlorofluorocarbons and hydrofluorocarbons and methods for producing the same A process for the preparation of compounds of the formula, F(CF2)a CC12 CC12 (CF2)b F where a and b are the same or different and are each an integer ࣙ1 (including the novel compound CF | 06/06/1995 |
| 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 exposure of at least about 2 watts-hour/kg.... | 08/09/1994 |
| 5332790 | Liquid-phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 07/26/1994 |
| 5326918 | Purification of 1,1-dichloro-1-fluoroethane This invention relates to a process to remove the unsaturated impurities (in particular vinylidene chloride) present in a crude 1,1-dichloro-1-fluoroethane. This process comprises subjecting the product to be purified, in the liquid phase, in the presence... | 07/05/1994 |
| 5322904 | Liquid-phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 06/21/1994 |
| 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 photochemically initiated reaction between liquified CTFE and... | 11/16/1993 |
| 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 than 280 nm.... | 11/09/1993 |
| 5235119 | Nitrocubanes An efficient direct functionalization of nitrocubanes has been achieved by irradiation of a solution in an oxalyl halide to yield halogenated and halocarbonylated derivatives of nitrocubanes.... | 08/10/1993 |
| 5214222 | Nitrocubanes An efficient direct functionalization of nitrocubanes has been achieved by rradiation of a solution in an oxalyl halide to yield halogenated and halocarbonylated derivatives of nitrocubanes.... | 05/25/1993 |
| 5214221 | Nitrocubanes An efficient direct functionalization of nitrocubanes has been achieved by rradiation of a solution in an oxalyl halide to yield halogenated and halocarbonylated derivatives of nitrocubanes.... | 05/25/1993 |
| 5093432 | Liquid phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 03/03/1992 |
| 5051158 | Process for preparing controlled molecular weight perfluoropolyethers having perfluoroalkyl or perfluorochloroalkyl end groups This invention relates to preparing perfluoropolyethers having neutral end groups by a process based on the photooxidation of C3 F6 and/or C2 F4, thereby obtaining controlled molecular weight products having per... | 09/24/1991 |
| 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 group, a chlorofluoromethyl group, a difluoromethyl group, a fluoromet... | 05/29/1990 |
| 4859299 | Novel perfluoropolyether and process for producing the same A novel perfluoropolyether containing 0.1 to 10% by weight of halogen atoms as bonded in the molecule is obtained by reacting tetrafluoroethylene with oxygen in a fluorinated solvent or a chlorofluorinated solvent under ultraviolet irradiation in the pres... | 08/22/1989 |
| 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 comprising a mixture of non-peroxidic polyfluoropolyether ... | 04/11/1989 |
| 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 preparation thereof.... | 08/11/1987 |
| 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 -25° C. to +120° C., by using gaseous fluorine diluted wit... | 08/04/1987 |
| 4675088 | Synthesis of Rf OTeF5 Pentafluorotellurium hypohalites are reacted with fluorocarbon iodides to form intermediate adducts which are thereafter decomposed to form fluorocarbons containing the TeF5 O-- group.... | 06/23/1987 |
| 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 2,2,2-trifluoroethylthiobenzene derivative is brought into contact with... | 02/17/1987 |
| 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.... | 12/27/1983 |
| 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## wherein R1 represents hydrogen, fluorine, ... | 11/16/1982 |
| 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 reaction products of the photochlorination at a temperature... | 12/11/1979 |
| 4060469 | Preparation of 1,1,1-trifluoro-2,2-dichloroethane 1,1,1-trifluoro-2,2-dichloroethane [CF3 CHCl2 ] is prepared by contacting 1,1,1-trifluoro-2-chloroethane [CF3 CH2 Cl] with a less than molar equivalent of chlorine under conditions of photochemical chlorination.... | 11/29/1977 |
| 4052277 | Process for preparing perfluorinated ethers Process for preparing perfluorinated ethers by exposing perfluorocarbonyl compounds of the formula ##STR1## wherein R1 and R2 mean identical or different perfluoroalkyl radicals optionally containing one or several ether-like bo... | 10/04/1977 |
