Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 851 - 900 out of 3,458

Document Document Title
WO/1992/006060
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/1992/004307
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/1992/003397
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/1992/002476
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/1992/002666
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/1992/002475
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/1992/001762
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/1992/001659
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/1992/000263
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/1991/018853
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/1991/018856
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/1991/018852
A thermal manufacturing method for producing 1,1-dichloro-1-fluoroethane by hydrofluorinating vinylidene chloride in the absence of a catalyst.  
WO/1991/017824
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/1991/016390
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/1991/015445
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/1991/014666
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/1991/013968
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/1991/013934
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/1991/013946
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/1991/013932
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/1991/013967
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/1991/013048
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/1991/012225
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/1991/011495
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/1991/011496
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/1991/009827
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/1991/009091
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/1991/005753
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/1991/005752
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/1991/005035
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/1991/004955
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/1991/005082
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/1991/001287
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/1990/012774
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/1990/010612
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/1990/009972
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/1990/008814
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...  
WO/1990/008748
A process for the hydrogenolysis and/or dehydrohalogenation of fluorohalocarbons and/or fluorohalohydrocarbons by reacting the fluorohalocarbons and/or fluorohalohydrocarbons with a source of hydrogen in the presence of a catalyst, the i...  
WO/1990/008815
A hydrochlorofluoropropane azeotropic or azeotropic-like composition comprising at least two members selected from the group consisting of hydrochlorofluoropropanes of the formula (I): CH¿a?Cl¿b?F¿c?CF¿2?CH¿x?Cl¿y?F¿z?, wherein a+...  
WO/1990/008755
This invention provides an improved process for the manufacture of 1,1,1,2-tetrafluoroethane by the reaction of HF and trichloroethylene in the presence of a catalyst to form a mixture comprising 2-chloro-1,1,1-trifluoroethane and 1,1,1,...  
WO/1990/008116
A process is provided for the chlorination of ethane using hydrogen chloride, chlorine or mixtures as the chlorination agent. The process includes reaction steps operated in tandem in separate zones first comprising the reaction of perch...  
WO/1990/008117
A process is provided for the chlorination of methane using hydrogen chloride as a source of chlorine. The process includes reaction steps operated in tandem in separate zones first comprising the reaction of perchloroethylene with hydro...  
WO/1990/007481
A process is disclosed for transforming a saturated reactant (e.g. 1,1,2-trichloro-1,2,2-trifluoroethane) into a saturated product (e.g. 1,1-dichloro-1,2,2,2-tetrafluoroethane) by contacting a gaseous mixture comprising said reactant wit...  
WO/1990/007568
Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane, and methanol or ethanol are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications includ...  
WO/1990/007482
A catalyst composition is disclosed which consists essentially of an aluminum fluoride prepared by the reaction of aluminum hydroxide and HF. Also disclosed is a process for preparing 1,1-dichloro-1,2,2,2-tetrafluoroethane by chlorofluor...  
WO/1990/006296
A liquid phase process for making perfluorinated organic substances which comprises directly contacting in a temperature-controlled reactor a diluted solution or dispersion of a perfluorinateable, organic substance in a liquid, inert med...  
WO/1990/002771
Azeotrope-like compositions comprising trichlorofluoromethane, dichlorotrifluoroethane and isopentane are novel compositions particularly useful as blowing agents in the preparation of polyurethane and polyisocyanurate foams.  
WO/1990/001474
The invention relates to a process for producing 1,1-dichloro-2,2,2-trifluoroethane, which comprises reacting 1,1,2-trichloro-2,2-difluoroethane (R122) and/or 1,1,2,2-tetrachloro-1-fluoroethane (R121) with HF in a liquid phase in the pre...  
WO/1990/000535
Normal alkane hydrocarbons are chlorinated with high terminal selectivity by pre-adsorbing the hydrocarbons into a pentasil zeolite.  
WO/1989/012617
A process for preparing fluorinated alkanes by contacting alkenes or halogenated alkanes with from 1 to 30 molar equivalents of hydrogen fluoride at from about 0°C to about 185°C in the presence of from 0.001 to 0.250 molar equivalent ...  

Matches 851 - 900 out of 3,458