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Patent Searching and Data


Matches 701 - 750 out of 6,734

Document Document Title
WO/2000/021660A1
The invention concerns a hydrofluorination catalyst based on a chromium oxide poor in ammonium salts.  
WO/2000/020362A1
3-bromo-1,1,1-trifluoropropane is produced by reacting 3,3,3-trifluoropropene with hydrogen bromide at elevated temperature, e.g., 150 °C to 800 °C, in the presence of an active carbon catalyst. The conversion, yield and selectivity ar...  
WO/2000/017136A1
Before at least one specific material selected from among 1,1,1,3,3-pentachloropropane, 1,1,3,3,-tetrachloropropene and 1,3,3,3-tetrachloropropene is fluorinated by reacting with HF, moisture is sufficiently eliminated from the material(...  
WO/2000/017137A1
A highly efficient and industrially advantageous process for producing 1,1,1,3,3-pentachloropropane (R240f) which comprises reacting carbon tetrachloride with vinyl chloride in the presence of a phosphoryl group-containing compound (phos...  
WO/2000/015588A1
A method for removing one or more fluorinated alkenes from a fluid comprises the step of contacting the fluid with an N-, S-, or P-containing nucleophile for a time sufficient to form an N-, S-, or P-containing nucleophile-fluoroalkene a...  
WO/2000/014040A1
The invention relates to the production of purified 1,1,1,3,3-pentafluorobutane (HFC-365mfc) comprising a reduced content of hydrogen chloride, hydrogen fluoride or unsaturated impurities. To this end, the material to be purified is trea...  
WO/2000/003962A1
A process for producing fluoroethanes consisting mainly of 1,1,1,2-pentafluoroethane by fluorinating at least one member selected from the group consisting of tetrachloroethylene, 2,2-dichloro-1,1,1-trifluoroethane, and 2-chloro-1,1,1,2-...  
WO/1999/062851A1
A process is disclosed for the manufacture of CF¿3?CF=CF¿2?, and optionally a least one compound selected from CF¿3?CH¿2?CF¿3? and CF¿3?CHFCHF¿2?. The process involves contacting a reactor feed including a precursor stream of at l...  
WO/1999/062849A1
A process for the manufacture of CF¿3?CF=CF¿2? is disclosed. The process involves contacting 2,3-dichloro-1,1,1,2,3,3-hexafluoropropane with at least 0.1 mole of hydrogen in a reaction vessel of titanium, nickel or iron or their alloys...  
WO/1999/062848A1
The invention relates to a method for producing alkyl chloride, alkenyl chloride and alkinyl chloride from alcohols by means of a reaction with a chlorinating agent in the presence of a catalyst which is a urea compound of formula (I): R...  
WO/1999/059951A1
1-chloro-3,3-dimethylbutane is oxidized by dimethyl sulfoxide, in the presence of an effective amount of inorganic bromide or iodide, and in the presence of an effective amount of base, to produce 3,3-dimethylbutyraldehyde.  
WO/1999/058484A1
An azeotrope-like composition comprising a perfluorobutyl methyl ether and a brominated hydrocarbon. The azeotrope-like composition has excellent dissolving ability.  
WO1999051556A3
A process is disclosed for the separation of a mixture of HF and CF3CC12CF3. The process involves placing the mixture in a separation zone at a temperature of from about 0 DEG C to about 100 DEG C and at a pressure sufficient to maintain...  
WO/1999/058481A1
A system and process for producing a fluorinated organic compound, said process comprising (a) reacting an organic compound with a fluorination agent in the presence of a liquid-phase fluorination catalyst to produce a product stream; (b...  
WO/1999/057088A1
The preparation of gaseous products from the thermal decomposition of 1,2-dichloroethane is simplified if the cracked gas is cooled down to a temperature ranging from approximately 150 to 180 °C. Only one subordinated portion which cont...  
WO/1999/052844A1
The invention relates to the preparation of 1-chloro-1,1,3,3,3-pentafluoropropane (HCFC-235fa), useful as an intermediate in the production of 1,1,1,3,3-pentafluoropropane (HFC-245fa). The invention further relates to a process for the p...  
WO/1999/051556A2
A process is disclosed for the separation of a mixture of HF and CF¿3?CC1¿2?CF¿3?. The process involves placing the mixture in a separation zone at a temperature of from about 0 °C to about 100 °C and at a pressure sufficient to mai...  
WO/1999/051553A1
A process is disclosed for the manufacture of hexafluoropropylene and 1,1,1,2,3,3,3-heptafluoropropane. The process involves: (a) feeding 1,1,2-trichloro-3,3,3-trifluoropropene-1, HF and Cl¿2? to a first reaction zone containing a catal...  
WO/1999/051555A1
A process is disclosed for the separation of a mixture of HF and CF¿3?CC1FCF¿3?. The process involves placing the mixture in a separation zone at a temperature of from about -30 °C to about 100 °C and at a pressure sufficient to main...  
WO/1999/050208A1
A process for the purification of difluoromethane comprising: (a) subjecting a mixture comprising at least difluoromethane (HFC-32) and dichlorodifluoromethane (CFC-12) to a first distillation step in which a majority of either CFC-12 or...  
WO/1999/050209A1
A fluorinated saturated hydrocarbon having a -CH¿2?-CHF-bond is produced (a) by providing a mixture of a fluorinated saturated hydrocarbon having a -CHF-CHF-bond and a fluorinated saturated having a -CH¿2?-CHF-bond as a feed stock, sel...  
WO/1999/048850A1
The present invention relates to mixtures of difluoromethane ('HFC-32') and chlorine. More particularly, the invention provides azeotrope-like compositions of HFC-32 and chlorine.  
WO/1999/048849A1
A process for producing 1,1,1,3,3-pentafluoropropane (HFC-245fa) which comprises: a first step in which 1-chloro-3,3,3-trifluoropropene (1233zd) is reacted with hydrogen fluoride in a gas phase to mainly obtain 1,3,3,3-tetrafluoropropene...  
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...  

Matches 701 - 750 out of 6,734