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| Number | Title | Issue Date |
| 7205444 | 1,1,1,3,3,3-hexafluoropropane purification with photochlorination equipment A continuous, vapor phase method for purifying a crude mixture of 1,1,1,3,3,3-hexafluoropropane and one or more unsaturated fluorocarbon compounds, the process comprising: a) providing a photochlorinator vessel comprising | 04/17/2007 |
| 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 |
| 6551469 | Photochlorination of 1,1,1,3,3-pentafluoropropane A process for preparing 1-chloro-1,1,3,3,3-pentafluoropropane, CF3 CH2 CF2 Cl, comprising contacting in a reaction zone in the substantial absence of oxygen, reactants comprising chlorine and 1,1,1,3,3-pentafluoropropane, ... | 04/22/2003 |
| 6245200 | Photo-oxidation method using MoS2 nanocluster materials A method of photo-oxidizing a hydrocarbon compound is provided by dispersing MoS2 nanoclusters in a solvent containing a hydrocarbon compound contaminant to form a stable solution mixture and irradiating the mixture to photo-oxide the hydrocarb... | 06/12/2001 |
| 6114591 | Process for preparing highly chlorinated paraffins The chlorination of paraffins is carried out in the presence of water and in the absence of an organic solvent. In this way, it is possible to prepare highly chlorinated paraffins in a simple manner. The presence of hydrochloric acid even at high temperat... | 09/05/2000 |
| 6077982 | Purification of 1,1,1,3,3-pentafluoropropane (R-245fa) In the synthesis of 1,1,1,3,3-pentafluoropropane (R-245fa), a mixture of R-245fa and the impurity 1-chloro-3,3,3-trifluoropropene (R-1233zd) is purified and R-1233zd is removed from the mixture by contacting the mixture with 1-5 mols of chlorine for each ... | 06/20/2000 |
| 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 |
| 5880317 | Preparation of 1,1,2,3,3-pentafluoropropane The present invention relates to a process for the reduction dechlorination of ClCF2 CFClCF2 Cl to HCF2 CHFCF2 H comprising the step of contacting 1,2,3-trichloropentafluoroethane and H2 over a cataly... | 03/09/1999 |
| 5773673 | Method of making chlorinated hydrocarbons Disclosed is a method of making chlorinated hydrocarbons. A mixture is prepared of a hydrocarbon or partially chlorinated hydrocarbon from C18 to C30 and either benzotrifluoride or parachlorobenzotrifluoride in an amount sufficient t... | 06/30/1998 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 5198593 | Process for purification of ethylene compound having fluorine-containing organic group A process for purifying an ethylene compound having a fluorine-containing organic group (fluorine-containing ethylene compound) by mixing the fluorine-containing ethylene compound with an alkali metal or alkaline earth metal reducing agent, and subjecting... | 03/30/1993 |
| 5190626 | Process for removing vinylidene chloride and other unsaturated compounds from 1,1-dichloro-1-fluoroethane Vinylidene chloride is removed from 1,1-dichloro-1-fluoroethane (HCFC-141b) by contacting the HCFC-141b in the vapor phase with chlorine in the presence of ultraviolet light providing an exposure up to about 50 watts-hour/kg.... | 03/02/1993 |
| 5104503 | Photochemical dimerization of organic compounds At least one of selectivity and reaction rate of photosensitized vapor phase dimerizations, including dehydrodimerizations, hydrodimerizations and cross-dimerizations of saturated and unsaturated organic compounds is improved by conducting the dimerizatio... | 04/14/1992 |
| 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 |
| 5087776 | New perfluoroalkanes obtained by photochemical fluorination and use thereof as polymerization initiators The present invention relates to branched perfluoroalkanes which, having bonds between a quaternary carbon atom and a tertiary carbon atom, easily undergo a homolytic scission of the C--C bond thereby releasing (non-persistent) radicals which may be used ... | 02/11/1992 |
| 5068470 | Perfluoroalkenes and fluorination products thereof The present invention relates to the synthesis of new terminal olefins, perfluoro 2,4-dimethyl 3-ethylpentene and perfluoro 2-isopropyl 3,3-dimethylbutene, and to the subsequent fluorination thereof in order to obtain highly branched perfluoroalkanes, cap... | 11/26/1991 |
| 5026928 | Perfluoroalkenes and fluorination products thereof The present invention relates to the synthesis of new terminal olefins, perfluoro 2,4-dimethyl 3-ethylpentene and perfluoro 2-isopropyl 3,3-dimethylbutene, and to the subsequent fluorination thereof in order to obtain highly branched perfluoroalkanes, cap... | 06/25/1991 |
| 4978435 | Free chlorine removal process Free chlorine values are removed by radical chlorination from uncombined admixtures thereof, notably admixtures of free chlorine and at least one halogenated organic compound that is not completely chloro-substituted.... | 12/18/1990 |
| 4935114 | Microwave-enhanced chemical processes A process for disposal of toxic wastes including chlorinated hydrocarbons, comprising, establishing a bed of non-metallic particulates having a high dielectric loss factor. Effecting intimate contact of the particulates and the toxic wastes at a temperatu... | 06/19/1990 |
| 4874488 | Photochemical dimerization and functionalization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and silanes The space-time yield and/or the selectivity of the photochemical dimerization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and primary, secondary and tertiary silanes with Hg and U.V. light is enhanced by refluxing the substrate in... | 10/17/1989 |
| 4801763 | Selective chlorination of chlorotrifluoroethylene telomers A process is disclosed for purifying and stabilizing a mixture of regular chlorotrifluoroethyelne telomers of formula RCXCl(CF2 CFCl)n Br from bromine-containing irregular telomer impurities of similar molecular weight. The telomer m... | 01/31/1989 |
| 4765876 | Simultaneous production of higher chloromethanes The higher chloromethanes, i.e., CH2 Cl2, CHCl3 and CCl4, are simultaneously produced by chlorinating methyl chloride with chlorine in a first reaction zone A, chlorinating at least one of the higher chlorometha... | 08/23/1988 |
| 4746760 | Process for functionalizing alkanes Process for functionalizing saturated hydrocarbons comprising: (a) reacting said saturated hydrocarbons of the formula: wherein H represents a hydrogen atom; and R1 represents a saturated hydrocarbon radical, with a metal complex of the formula: wherei... | 05/24/1988 |
| 4731170 | Process for preparing alpha, omega-haloperfluoroalkanes A process for preparing ,ω-dihaloperfluoroalkanes consisting in dihalogenating ,ω-diiodoperfluoroalkanes, or ,ω-chloroiodoperfluoroalkanes or ,ω-bromoiodoperfluoroalkanes with Cl2 or Br2.... | 03/15/1988 |
| 4689130 | Continuous production of higher chloroalkanes The higher chloroalkanes, advantageously the higher chloromethanes, are continuously produced from at least one lesser chloroalkane, by (i) continuously introducing chlorine and said at least one lesser chloroalkane into a stream of reaction medium contin... | 08/25/1987 |
| 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 |
| 4614572 | Liquid phase chlorination of chlorinated methanes This invention relates to an improved liquid phase chlorination process for the chlorination of methyl chloride to preferentially produce methylene chloride. The chlorine is provided to the reaction mixture in a mole percent, based upon the total moles of... | 09/30/1986 |
| 4417964 | Method of preparing olefinic compounds A method of preparing compounds having at least one olefinic double bond, ich method comprises irradiating the corresponding saturated halogenated compound in gaseous form, with pulsed coherent light or incoherent light, adjusting the wavelength of the ir... | 11/29/1983 |
| 4328078 | Method of producing carbon-13 by multiphoton decomposition of C3 F.sub. A method of producing carbon--13 by multiphoton decomposition of C3 F6, said material containing carbon--12 and carbon--13 isotopic species, comprising irradiating gaseous C3 F6 in a reaction chamber at a pressu... | 05/04/1982 |
| 4324930 | 2,3-Dichloro-2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoropentane and process for its manufacture The compound 2,3-dichloro-2-trifluoromethyl-1,1,1,3,4,4,5,5,5-nonafluoropentane is obtained by chlorinating perfluoro(2-methyl-2-pentene) with elementary chlorine in the presence of light rich in energy. This compound is distinguished by a high therm... | 04/13/1982 |
