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Matches 701 - 750 out of 6,662

Document Document Title
WO/1999/048606A1
The invention relates to a method for producing a supported catalyst used for the production of 1,2-dichloroethane by tabletting a mixture of pseudo-boehmite and gamma alumina at a weight ratio of between 4:1 to 1:4, possibly with the ad...  
WO/1999/044973A1
Disclosed is PFC-C318 containing less than 10 parts-per-million-molar of halogenated impurities and processes for producing such substantially-pure PFC-C318. In operating these processes, various PFC-C318-containing azeotropes and azeotr...  
WO1999026906A3
A process for producing fluorinated organic compounds comprising reacting an organic compound fluorination agent in the presence of a fluorination catalyst, while maintaining a pressure less than sufficient for high-temperature distillat...  
WO/1999/043635A1
The invention concerns improved catalytic hydrofluorination of saturated or unsaturated organic compounds corresponding to the general formula C¿w?H¿x?Cl¿y?F¿z? (I) wherein w is an integer ranging between 1 and 6, x is an integer ran...  
WO/1999/040053A1
Production of heptafluoropropane from chlorocarbon feedstocks, e.g. 2-hydro-2-chloropropane or a 2-chloro-propene, by reaction with HF in a 2-stage reaction process.  
WO/1999/034918A1
A catalyst for the oxychlorination of ethylene to 1,2-dichloroethane is prepared by impregnating a $g(g)-alumina support with a magnesium salt, drying the product, and impregnating the product with a copper salt, preferably together with...  
WO/1999/032843A1
There are provided a process for separating and purifying fluorine compounds, in which a proper rectifying operation of a mixed gas can be carried out even when it contains methane trifluoride, whereby fluorine compound components contai...  
WO/1999/031032A1
A process for the preparation of pentafluoroethane by fluorinating a chlorinated carbon compound in the presence of a non-crystalline chromium catalyst comprising as the main component a chromium compound which contains at least one meta...  
WO/1999/026908A1
The invention provides a method for separating fluorocarbons from mixtures of fluorocarbon and hydrogen fluoride. In particular, the invention provides a method for separating fluorocarbons, such as pentafluoropropane, from azeotropic mi...  
WO/1999/026906A2
A process for producing fluorinated organic compounds comprising reacting an organic compound fluorination agent in the presence of a fluorination catalyst, while maintaining a pressure less than sufficient for high-temperature distillat...  
WO/1999/026907A1
Preparation of a fluorine-containing organic compound by reacting a haloalkene with hydrogen fluoride wherein both the fluorine-containing organic compound and the haloalkene separately form azeotropes with hydrogen fluoride and wherein ...  
WO/1999/026594A1
The invention concerns a hair lotion characterised in that it contains a solvent¿n consisting of at least a hydrofluoroether of general formula (I) C¿n?H¿m?F¿2n+1-m?-O-C¿p?H¿q?F¿2p+1-q? in which n = 1 to 20; m = 0 to 2n+1; p = 1 t...  
WO/1999/025670A1
A liquid phase fluorination process for producing difluoromethane without corrosion is provided. In the process of this invention, methylene chloride and hydrogen fluoride are reacted in a reactor made of fluorinated polymer to produce a...  
WO/1999/025786A1
Mixtures of 1,1,1,2-tetrafluoroethane ('HFC-134a') or 1,1,2,2-tetrafluoroethane ('HFC-134') and 1,1,1,2,3,3,3-heptafluoropropane ('HFC-227ea') are provided. More specifically, the invention provides mixtures of HFC-134a or HFC-134 and HF...  
WO/1999/024358A1
Nitrogen trifluoride (NF¿3?) containing less than 10 parts-per-million molar impurities, e.g., tetrafluoromethane (PFC-14), is disclosed. A zeotropic and extractive distillation processes using entraining agents for separating NF¿3?, a...  
WO/1999/020585A1
Disclosed are processes for separating 1,1,1,3,3-pentafluoropropane (HFC-245fa) from hydrogen fluoride (HF) by distillation, wherein hydrocarbons, chlorofluorocarbons, hydrochlorofluorocarbons and fluorocarbons are used as entraining age...  
WO/1999/019285A1
A process for the preparation of 1,1,1,2,2-pentafluoroethane by fluorinating a halohydro-carbonaceous feedstock containing 2-chloro-1,1,1,2-tetrafluoroethane with hydrogen fluoride in a gas phase, characterized in that: (i) a chromium fl...  
WO/1999/019286A1
A process for producing 1,1,1,2,2-pentafluoroethane by fluorinating at least either of 2,2-dichloro-1,1,1-trifluoroethane and 2-chloro-1,1,1,2-tetrafluoroethane as a starting material with hydrogen fluoride, characterized by separating t...  
WO/1999/019284A1
Disclosed herein is a telomerization process for preparing fluorinated alkyl iodide telomers, comprising telomerizing a starting polyfluoroalkyl iodide with a terminally unsaturated perfluoro olefin or monochlorofluoro olefin.  
WO/1999/007660A1
The present invention provides extractive distillation processes for removing difluoromethane (HFC-32) from a mixture comprising HFC-32 and at least one of chlorodifluoromethane (CFC-12), 1,1,1-trifluoroethane (HFC-143a), chloropentafluo...  
WO/1999/007659A1
The invention concerns a method for obtaining halogenated hydrocarbons comprising at least 3 carbon atoms which consists in reacting a haloalkane with a halogenated olefin in the substantial absence of nitrile and in introducing the reag...  
WO/1999/006342A1
A process for the preparation of 1,1,1,2,3,3,3-heptafluoropropane (HFC 227ea) by reacting hydrogen fluoride with hexafluoropropane (HFP) in the vapour phase over a fluorination catalyst using a molar ratio of HF:HFP is at least 3.5:1. Th...  
WO/1999/002642A1
This invention provides a stabilized alkyl bromide based solvent system that is useful for cleaning and degreasing a wide variety of metal objects. The solvent is stabilized with a stabilizer system that includes a dialkyl carbonate such...  
WO1998037043A3  
WO/1999/001412A1
The invention relates to a continuous method for producing pentafluoroethyl iodine, iodine pentafluoride and tetrafluoroethylene, characterized in that the iodine is dissolved in iodine pentafluoride and the solution obtained is continuo...  
WO/1999/000344A1
A process for producing a hydrofluorocarbon (HFC) comprising: (a) providing a fluoropolymer-lined reactor; (b) adding a chlorinated organic compound in liquid phase and a fluorination agent to the reactor; and (c) reacting at least a por...  
WO/1999/000897A1
Novel structures and methods for forming useful high temperature superconducting devices, most particularly resonators, are provided. Structures resulting in reduced peak current densities relative to known structures achieve numerous de...  
WO/1999/000345A1
The invention provides a process for the preparation of 1,1,2,3,3,4-hexafluorobutane by telomerization of chlorotrifluoroethylene to produce 1,1,3,4-tetrachlorohexafluorobutane followed by reduction of that compound to 1,1,2,3,3,4-hexafl...  
WO/1998/056742A1
A method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture of them, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixt...  
WO/1998/054117A1
A compound having the formula: CF¿3?CH¿2-w?(H¿1-x?CH¿2-y?R¿m?R'¿n?CH¿1-z?)¿p?H¿2-q ?CF¿3? wherein w=0, 1 or 2; x=0 or 1; y=0, 1 or 2; m=0, 1 or 2; n=0 or 1; z=0 or 1; p=1 or 2; and q=0, 1 or 2; with the provisos that 1$m(F)w+x$...  
WO/1998/052889A1
A method by which pentafluoroethane (HFC-125) can be efficiently separated from a mixture of HFC-125 with chloropentafluoroethane (CFC-115). The process for preparing high-concentration HFC-125 by the extractive distillation of a mixture...  
WO/1998/051650A1
Compositions comprising linear or cyclic fluorinated, saturated hydrocarbons of the following general formulae (I): Rf�1?-R�1?-Rf�2? and (II): Rf�1?-R�2?-Rf�2?. Each composition comprises more than 10 molar % and less than 95...  
WO/1998/051649A1
Compositions comprising linear or cyclic fluorinated, saturated hydrocarbons of the following general formula (I) Rf�1?-R�1?-Rf�2? and (II) Rf�1?-R�2?-Rf�2, and the use thereof. Each composition comprises more than 10 molar %...  
WO/1998/051651A1
Incombustible fluorinated hydrocarbons excellent in detergency and stabilities to alkalis, water and heat; and polymer-containing fluids obtained by dissolving or dispersing a film-forming polymer, preferably a fluoropolymer in a solvent...  
WO/1998/050329A1
The invention concerns a method for obtaining 1,1,1,3,3-pentachlorobutane which consists in reacting carbon tetrachloride with 2-chloroprop-1-ene in the presence of a copper (I) or (II) compound as telomerisation catalyst. Advantageously...  
WO/1998/050331A1
A process for removing carbon dioxide from a fluorocarbon carbon dioxide mixture in which the fluorocarbon carbon dioxide mixture is contacted with a semipermeable polyimide membrane to form at least one exit stream having an increased c...  
WO/1998/050330A1
The invention concerns a method for obtaining halogenated hydrocarbons containing at least 3 carbon atoms by reacting a haloalkane with an olefin in the presence of a copper organic compound as catalyst, of a solvent and/or a co-catalyst...  
WO/1998/042645A1
A process is disclosed for forming adducts of the formula: RR?1�R?2�CCR?1�R?2�F or (FR?1�R?2�CCRR?2�CH�2?)�2? where R is CH�3?, CH�2?F, C�2?H�4?F or F(CF�2?)�n?CH�2?CH�2? (where n is an integer from 1 to...  
WO/1998/040334A1
The present invention provides a process for the preparation of chlorofluorohydrocarbon 1,1-difluoro-1,4-dichlorobutane by reacting 1,1,1,4-tetrachlorobutane or 1,1,4-trichlorobut-1-ene with hydrogen fluoride in the vapour phase. The pro...  
WO/1998/040335A1
A tetrahalogenopropane as a starting material is chlorofluorinated by reacting it preferably with chlorine and hydrofluoric acid in the presence of a catalyst to thereby obtain 1,1,1,3,3-pentafluoropropane. Thus, 1,1,1,3,3-pentafluoropro...  
WO/1998/037043A2
A process is disclosed for producing the pentafluoropropenes of the formula CF�3?CX=CF�2?, where X is H or Cl. The process involves hydrodehalogenating CF�3?CCl�2?CF�3? with hydrogen at an elevated temperature in the vapor phas...  
WO/1998/037046A1
A process for producing n-propyl bromide during the bromination of bis- of trisphenols uses non-aqueous n-propanol as the bromination solvent, providing salable yields of n-propyl bromide to accompany the brominated bisphenol or trisphenol.  
WO/1998/037044A1
The invention relates to a method for cleaning methyl chloride contaminated with C�1?-C�3? hydrocarbons and/or isobutane. The invention relates in particular to a method for removing impurities from methyl chloride used in the produc...  
WO/1998/033756A1
A process is disclosed for producing the hydrofluorocarbon CF�3?CH�2?CHF�2?. The process involves dehydrofluorinating CF�3?CH�2?CF�3? at an elevated temperature in the vapor phase over a catalyst of (1) aluminum fluoride, (2)...  
WO/1998/032521A1
A method is proposed to recover and concentrate perfluorinated compounds and hydrofluorocarbon gases from effluent gases in manufacturing processes. The method involves contacting the gas with a membrane module equipped with inorganic, m...  
WO/1998/031649A1
A liquid phase process is disclosed for producing halogenated alkane adducts of the formula CAR?1�R?2�CBR?3�R?4� (where A, B, R?1�, R?2�, R?3� and R?4� are as defined in the specification) which involves contacting a corr...  
WO/1998/031650A1
In order to isomerize a hydrofluorocarbon with a certain thermodynamic stability (HFC 1) into hydrofluorocarbon with greater thermodynamic stability (HFC 2), the hydrofluorocarbon HFC1 is subjected to a thermal treatment in the presence ...  
WO/1998/028247A1
The invention provides a process for production of 1,1,1,2,3,3,3-heptafluoropropane, HFC-227ea. In particular, the invention provides an inexpensive process for producing HFC-227ea in good yield by reacting 1,1,1,3,3,3-hexafluoropropane,...  
WO/1998/027145A1
The invention relates to novel mixtures containing 50-99 wt. % 1,1,1,3,3-pentafluorobutane and 1 to 5o wt. % of at least one fluorohydrocarbon selected from a group consisting of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane, 1...  
WO/1998/021171A1
A process for the catalytic fluorination of hydrochlorocarbons and hydrochlorofluorocarbons in the liquid phase. The process is useful for fluorinating hydrochloropropanes, hydrochlorofluoropropanes, hydrochloropropenes and hydrochlorofl...  

Matches 701 - 750 out of 6,662