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Matches 851 - 900 out of 6,118

Document Document Title
WO/1992/017559A1
Trichlorofluoromethane refrigeration systems use mineral oil to lubricate the compressor. We have found that the use of 1,1-dichloro-2,2,2-trifluoroethane and mineral oil results in the formation of 1-chloro-2,2,2-trifluoroethane; in the...  
WO/1992/016481A1
A process is disclosed for producing HFC-134a which includes reacting certain tetrahaloethane starting materials (e.g., 2-chloro-1,1,1-trifluoroethane) with HF in the gaseous phase at an elevated temperature in the presence of certain su...  
WO/1992/016197A1
Optically pure (S) metoprolol, which is substantially free of the (R) enantiomer, is a potent beta-blocker for treating myocardial infarction and for relieving the symptoms of angina pectoris, cardiac arrhythmia and hypertension in indiv...  
WO/1992/014444A1
Aerosol formulations for use in metered dose inhalers are disclosed which include 1,1,1,2-tetrafluoroethane alone and in combination with other compounds as well as various hydrocarbon blends. The density, vapor pressure, flame extension...  
WO/1992/013817A1
A vapor phase process is disclosed for producing HCFC-225s, HCFC-235s, HCFC-226s, HFC-236s, and HFC-227s by reacting certain three-carbon reactants containing at least one less fluorine than, and at least as many hydrogen substituents as...  
WO/1992/011339A1
Ternary mixtures of pentafluoroethane, difluoromethane and tetrafluoroethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyu...  
WO/1992/011338A1
Constant boiling mixtures of pentafluoroethane and difluoromethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes, ...  
WO/1992/010453A1
The present invention provides stabilized compositions comprising 1,1-dichloro-1-fluoroethane and effective stabilizing amounts of stabilizer selected from the group consisting of alkanol having 4 to 7 carbon atoms, nitroalkane having 1 ...  
WO/1992/010452A1
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.  
WO/1992/009548A1
A process for producing 3,3-dichloro-1,1,1,2,2-pentafluoropropane (R225ca) and 1,3-dichloro-1,1,2,2,3-pentafluoropropane (R225cb) from tetrafluoroethylene (C¿2?F¿4?) and dichlorofluoromethane (R21) in high yields at high selectivity, b...  
WO/1992/007111A1
Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and trans 1,2-dichloroethylene with methanol or ethanol, the azeotropic mixtures being useful in solvent cleaning applications.  
WO/1992/007112A1
Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and methanol or ethanol or isopropanol, the azeotropic mixtures being useful in solvent cleaning applications, as blowing agents, refrigerants, heating mediums and aerosol prop...  
WO/1992/006941A1
The compounds CF3CHFCHFCF2CF3, CF3CH2CHFCF2CF3, CF3CHFCH2CF2CF3, CF3CHFCHFCF2CF2CF3, CF3CH2CHFCF2CF2CF3, CF3CHFCH2CF2CF2CF3, CF3CF2CH2CHFCF2CF3, CF3CF2CHFCHFCF2CF2CF3, CF3CHFCHFCF2CF2CF2CF3, CF3CHFCH2CF2CF2CF2CF3, CF3CH2CHFCF2CF2CF2CF3, ...  
WO/1992/006060A1
A process for coupling fluorocarbons of the formula Rf-I, RfCH¿2?CH(Rf)-I, RfCH¿2?CH(Rf)CH¿2?CH(Rf)-I, where Rf is C¿n?F¿2n+1? where n is 1 to 10 is disclosed. The process involves an acidic aqueous treatment in the presence of zinc...  
WO/1992/004307A1
The method proposed enables extensively fluorinated alkyl bromides, in particular perfluoroalkyl bromides, to be prepared by reacting extensively fluorinated alkyl iodides with organic bromine compounds in which the bromine atom is coval...  
WO/1992/003397A1
A difluorinated hydrocarbon compound represented by general formula (1) is reacted with cobalt trifluoride to give a trifluorinated hydrocarbon compound represented by general formula (2), wherein R represents lower alkyl and R' and R'' ...  
WO/1992/002476A1
A method is disclosed for increasing in a composition the mole fraction of a compound selected from the group CF3CHCl2, CF3CHF2 and CF3CHClF relative to the total mole fraction of the other two compounds of the group. The method comprise...  
WO/1992/002666A1
Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane; ethanol; and nitromethane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and d...  
WO/1992/002475A1
According to the process of the invention, highly fluorinated alkyl bromides, preferably perfluoroalkyl bromides, are produced by the reaction of highly fluorinated alkyl iodides with phase transfer catalysts in bromide form.  
WO/1992/001762A1
Near-Azeotropic blends of: pentafluoroethane and 1,1,1-trifluoroethane with one or more of chlorodifluoromethane, 1,2,2,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, 1-chloro-1,1,2,2-tetrafluoroethane, 1-chloro-1,2,2,2-tetrafluoroethan...  
WO/1992/001659A1
A method of removing chloroprene by heating 1,2-dichloroethane containing it in a temperature range above the boiling point (85 °C) of the dichloroethane and below the thermal decomposition temperature (300 °C) thereof. This method can...  
WO/1992/000263A1
Novel partially fluorinated alkanes having formula (I), wherein each R is the same or different and is selected from the group consisting of CF3, CHF2, CH2F, and CH3CF2, and R' is an alkyl or fluoroalkyl group having 1 to 6 carbon atoms ...  
WO/1991/018853A1
Process for the preparation of fluorinated alkanes by contacting a starting material of halogenated alkene or alkane with 1 to 150 molar equivalents based on catalyst of HF, 1 to 30 molar equivalents based on catalyst of a dehydrating ag...  
WO/1991/018856A1
Perchloroethylene is oxychlorinated to provide hexachloroethane which is reacted with methane to produce methyl chloride which is hydrolyzed to form methyl alcohol product and hydrogen chloride which is recycled to the oxychlorination step.  
WO/1991/018852A1
A thermal manufacturing method for producing 1,1-dichloro-1-fluoroethane by hydrofluorinating vinylidene chloride in the absence of a catalyst.  
WO/1991/017824A1
A process is disclosed for the treatment of a new or deactivated supported metal catalyst containing noble metal to prepare said catalyst for use in the hydrodehalogenation of a compound having the formula: CnHmFpXq, where each X is inde...  
WO/1991/016390A1
Azeotrope-like blends are disclosed comprising effective amounts of 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1-difluoroethane (HFC-152a) and a halocarbon selected from the group consisting of 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124),...  
WO/1991/015445A1
1,1,1,2-Tetrafluoroethane (R134a) is purified to remove 50-10,000 wt. ppm of 2-chloro-1,1-difluoroethylene (R1122) by contacting with a zeolite or carbon molecular sieve having an average pore diameter of 3.8 to 4.8 Angstroms. The zeolit...  
WO/1991/014666A1
A process for halogen exchange fluorination by contacting a halocarbon having a replaceable halogen other than fluorine with KF.nHF wherein n is 0.5-3 to provide a fluorinated hydrocarbon having at least one more fluorine than the starti...  
WO/1991/013968A1
The azeotrope of 1,1,1,2-tetrafluoroethane and dimethyl ether and its use as a refrigerant, aerosol propellant and polymer foam blowing agent are disclosed.  
WO/1991/013934A1
Azeotropic mixtures of dichloropentafluoropropane (HCFC-225) and trans-1,2-dichloroethylene (T-HCC-1130) with methanol or ethanol or isopropanol, are useful in solvent cleaning applications as refrigerants, aerosol propellants and polyme...  
WO/1991/013946A1
Azeotropic mixtures of perfluoro-dimethylcyclobutane with 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane, are useful in solvent cleaning applications, and as refrigerants, aerosol propellants and polymer blowing agents.  
WO/1991/013932A1
The azeotrope of 1-chloro-1,2,2,2-tetrafluoroethane and dimethyl ether is useful as a refrigerant, aerosol propellant and polymer foam blowing agent.  
WO/1991/013967A1
Azeotropic mixtures of perfluoro-1,2-dimethylcyclobutane, methanol and either 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane, are useful in solvent cleaning applications, and as refrigerants, aerosol propellants and polymer blowi...  
WO/1991/013048A1
A process for halogen exchange fluorination by contacting a solid composition of alkali metal fluoride with a gaseous halocarbon having a replaceable halogen other than fluorine to produce a fluorinated hydrocarbon having at least one mo...  
WO/1991/012225A1
A process for halogen exchange fluorination by contacting a halocarbon having a replaceable halogen other than fluorine with CsF or RbF.nHF wherein n is 0.5-3 to provide a fluorinated hydrocarbon having at least one more fluorine than th...  
WO/1991/011495A1
Novel advantageous vehicle gas mixtures contain two or more components, at least one of which is a partly fluorinated lower alkane, and may be used in medical preparations.  
WO/1991/011496A1
Besides 1,1,1,2,3,3,3-heptafluoropropane, novel advantageous vehicle gases may contain one or more further vehicle gas components and may be used in medical preparations.  
WO/1991/009827A1
Method for producing chloroform by catalytic hydrogenolysis of carbontetrachloride in liquid phase, characterized in that carbontetrachloride in liquid phase is reacted with gaseous hydrogen or with a gas containing molecular hydrogen, a...  
WO/1991/009091A1
Novel azeotrope-like compositions comprising 1,2-difluoroethane and dichlorotrifluoroethane which are useful in a variety of industrial applications including refrigerant applications, solvent applications, and blowing agent applications.  
WO/1991/005753A1
A process for the preparation of chlorofluoropropanes of the formula C3HCl2F5 by contacting monofluorodichloromethane with tetrafluoroethylene in the presence of a modified aluminum chloride catalyst at a temperature of 0 to 150 °C. The...  
WO/1991/005752A1
Halocarbons such as CCl2F2, CF3CFHCl or CF3CFCl2 which contain chlorine and/or bromine are contacted with hydrogen in the presence of silicon carbide and/or a metal selected from aluminum, molybdenum, titanium, nickel, iron or cobalt (or...  
WO/1991/005035A1
Stable azeotrope-like compositions consisting essentially of dichloropentafluoropropane and an alkanol having 1-4 carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of pri...  
WO/1991/004955A1
A halocarbon product made from the reaction of excess hydrogen fluoride with a halocarbon, containing excess hydrogen fluoride as an azeotrope is purified by fluorination in the presence of additional halocarbon or halo-olefin.  
WO/1991/005082A1
Azeotrope-like compositions comprising dichloropentafluoropropane and 1,2-dichloroethylene are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defl...  
WO/1991/001287A1
A process for producing a dichloropentafluoropropane, which comprises subjecting CF�2?=CF�2? and CCl�3?X (wherein X is Cl, F or H) to an addition reaction, and reducing and/or fluorinating the resulting C�3?Cl�3?F�4?X to obta...  
WO/1990/012774A1
An adiabatic vapor phase chlorination of methylene chloride, methyl chloride or a mixture thereof is improved by the injection of a portion of the methylene chloride, methyl chloride or mixture thereof into the reactor in the liquid stat...  
WO/1990/010612A1
R-1122 (2-chloro-1,1-difluoro-ethylene) can be substantially removed from a stream of R-134a over a zeolite or carbon molecular sieve having a mean pore size of about 3.8 to 4.8 Angstroms. Preferred are 5A synthetic zeolites or calcium c...  
WO/1990/009972A1
The fluoroalkyl derivative of the invention is a new compound represented by general formula (I) or (II), wherein R1 represents (a) (wherein X represents hydrogen, chlorine, bromine, fluorine, iodine, methyl, ethyl, methoxy, ethoxy or ni...  
WO/1990/008814A1
A hydrochlorofluorocarbon azeotropic or azeotropic-like mixture comprising at least one member selected from the group consisting of hydrogen-containing fluoropropanes of the formula (I): CH¿a?Cl¿b?F¿c?CF¿2?CH¿x?Cl¿y?F¿z?, wherein...  

Matches 851 - 900 out of 6,118