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Matches 451 - 500 out of 6,214

Document Document Title
WO2002059068A3
The invention relates to azeotropic and azeotrope-like mixtures of 1-chloro-1,3,3,3-tetrafluoropropane (HCFC-244fa) and hydrogen fluoride, which are useful as intermediates in the production of HCFC-244fa.  
WO/2003/077034A2
This invention concerns radiation durable organic compositions which are well-suited for use in 157 nm lithography by virtue of their high transparency and excellent radiation durability, and to a process for the preparation thereof.  
WO2003000626A3
Process for the treatment of by-products from a reaction for the production of organic compounds comprising a stage of evaporation of a liquid phase comprising heavy by-products on a surface, in order to form a concentrated phase compris...  
WO2003004445A3
Tetrachloroethylene containing a stabilizer is contacted with a zeolite having an average pore size of 3.4 to 11 and/or a carbonaceous adsorbent having an average pore size of 3.4 to 11 in a liquid phase to obtain a high purity tetrachlo...  
WO/2003/068717A1
The invention relates to the use of a composition on the basis of stabilized trichloroethylene with an amine and a phenol as starting materials, particularly for synthesizing hydrofluoroalkanes (HFA).  
WO/2003/068737A2
The present invention is directed to labeled compounds, [2 111, 13C], [2 H2, 13C] and [2 H3, 13C]methyl aryl sulfides wherein the 13C methyl group attached to the sulfur of the sulfide includes exactly one, two or three deuterium atoms a...  
WO/2003/068716A1
The present invention involves processes that utilize an olefinic compound, in particular, hexafluoropropene (HFP) or chlorotrifluoroethene (CFC−1113) as extracting agents in the purification of pentafluoroethane (HFC−125). These pro...  
WO/2003/066210A1
The invention relates to a liquid phase fluorination reactor. The inventive reactor comprises, by way of a heating means, an element which is fixed to the cover thereof in such a way that it extends down the bottom of the tank. The inven...  
WO/2003/066214A2
The invention relates to a catalyst-composition for the oxychlorination of ethylene, containing a mixture of metal salts on a support, whereby the above-mentioned metal salts are applied to the support in such ratio proportions that the ...  
WO/2003/064360A1
The invention relates to novel synthetic tetraethers and a novel method for producing said substances. The inventive tetraethers are characterised in that they can be modified in a simple and targeted manner according to said synthesis m...  
WO2002076913A3
The invention relates to a method for preparing a halogenated olefin by reacting an alkyne and/or an allenic compound with a hydrogen halide in a liquid medium comprising at least one hydrohalogenation catalyst containing at least one pa...  
WO/2003/053580A1
Catalysts such as antimony halides can be used during fluorination reactions involving hydrogen fluoride. Said catalysts can be reduced during the reaction. Oxidation is usually carried out by introducing elementary halogen, preferably c...  
WO/2003/051802A1
The present invention relates to the co-pyrolysis of fluoroform and chlorodifluoromethane to form a mixture of useful fluoroolefin and saturated HFCs, notably, tetrafluoroethylene and hexafluoropropylene and CF¿3?CHF¿2? and CF¿3?CHFCF...  
WO/2003/051800A1
A fluoroalkene is reacted with hydrogen iodide gas in the presence of a catalyst to produce a fluoroalkyl iodide represented by the general formula (II): Rf−CH2CH2I (II) wherein Rf represents C1−20 perfluoroalkyl or polyfluoroalkyl. ...  
WO/2003/048088A1
The invention relates to a method for the production of 1,2-dichloroethane, comprising the following steps: (A) feeding a feed gas flow containing an ethane into a dehydrogenation zone; dehydrogenating the ethane into ethene while obtain...  
WO/2003/045880A1
A process for preparing 1-chloro-1,1,3,3,3-pentafluoropropane, CF¿3?CH¿2?CF¿2?Cl, comprising contacting in a reaction zone in the substantial absence of oxygen, reactants comprising chlorine and 1,1,1,3,3-pentafluoropropane, CF¿3?CH...  
WO2003018552A3
The present invention is directed to protected amino acid halide monomers and oligomers, and to their use in the efficient sythesis of polyamides. The present invention is further directed to the use of -haloenamine reagents, which may o...  
WO/2003/042138A1
A method is described for producing n-propyl bromide of a high degree of purity, which contains isopropyl bromide in an amount lower than 0.1% w/w, and usually lower than 0.05%. The method is characterized in that n-propanol is reacted w...  
WO2002077117A3
Provided are azeotropic and azeotrope-like mixtures of 1,1,1,3,3- pentafluoropropane (HFC-245fa) and 1-chloro-1,1,3,3,3-pentafluoropropane (HCFC-235fa) that are useful as intermediates in the production of HFC-245fa. A process for separa...  
WO/2003/029173A2
Methods and materials are provided for the production of essentially isomerically pure perhalogenated and partially halogenated compounds. One embodiment of the present invention provides a process for the production of essentially isome...  
WO2002094751A3
An oxidative halogenation process involving contacting a reactant hydrocarbon selected from methane, a halogenated C1 hydrocarbon, or a mixture thereof with a source of halogen and, preferably, a source of oxygen in the presence of a rar...  
WO2002055459A3
A method of producing hydrofluorocarbons and/or hydrochlorofluorocarbons by using halogenated alkanes as a principal reactant. Generally, the method comprises the step of: (a) reacting a starting halogenated alkane corresponding to the f...  
WO2002102750A3
A process is provided by which addition of water is used to enhance the production of any hydrochlorocarbon feedstock through the use of Kharasch chemistry, i.e. the combination of a polychlorinated alkane with an olefin to produce a chl...  
WO2002076915A3
A method for separating difluoromethane from a mixture of said difluoromethane and at least one impurity, said method comprising extractively distilling said mixture using dichloromethane as the extractive agent to recover a product stre...  
WO/2003/022786A1
Process for the obtention of HFC-227ea having a reduced content of organic impurities, comprising at least subjecting a crude HFC-227ea to two distillation steps at different pressures.  
WO/2003/020684A1
The present invention describes immobilized haloenamine reagents, immobilized tertiary amides, methods for their preparation, and methods of use.  
WO/2003/020676A1
Provided is a method and system for separating heavy ends from a halogenated alkane in a waste stream. The method includes: (a) removing a bottom fraction containing heavy ends from a catalyst recovery unit and conveying the bottom fract...  
WO/2003/020675A1
It has been discovered that highly fluorinated antimony, especially as a hydrogen fluoride addition compound, can be used as an isomerisation catalyst for the isomerisation of certain halogen(hydro)carbon compounds. For example, 1,1,1-tr...  
WO/2003/018552A2
The present invention is directed to protected amino acid halide monomers and oligomers, and to their use in the efficient sythesis of polyamides. The present invention is further directed to the use of -haloenamine reagents, which may o...  
WO2003002251A3
A process for preparing a fluorination catalyst using a low pressure activating step followed by a high pressure activating step.  
WO/2003/014047A1
A process for production of high-purity hexafluoroethane, wherein a mixed gas containing hexafluoroethane and chlorotrifluoromethane is reacted with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst at 200-450°...  
WO2002055457A3
A process for purifying octafluoropropane according to the present invention comprises the step of contacting a crude octafluoropropane containing impurities with an impurity decomposing agent under elevated temperature and then with an ...  
WO2002088148B1
The ability to design and construct solid-state materials with pre-determined structures is a grand challenge in chemistry. An inventive strategy based on reticulating metal ions and organic carboxylate links into extended networks has b...  
WO/2003/004463A1
The invention concerns fluorofunctional statistical polymers of formula (V1), wherein: X, Y and Z represent a hydrogen atom and exhibiting in particular low glass transition temperatures obtained in particular from a monomer of formula (...  
WO/2003/004445A2
Tetrachloroethylene containing a stabilizer is contacted with a zeolite having an average pore size of 3.4 to 11 and/or a carbonaceous adsorbent having an average pore size of 3.4 to 11 in a liquid phase to obtain a high purity tetrachlo...  
WO/2003/002251A2
A process for preparing a fluorination catalyst using a low pressure activating step followed by a high pressure activating step.  
WO2002066408A3
The process for producing perfluorocarbons according to the present invention is characterized in that in the production of a perfluorocarbon by contacting an organic compound with a fluorine gas, the organic compound is contacted with t...  
WO2001066498A3
The invention concerns a method for obtaining a hydrofluoroalkane which consists in subjecting the hydrofluoroalkane comprising organic impurities to at least two distillations.  
WO/2003/000626A2
Process for the treatment of by-products from a reaction for the production of organic compounds comprising a stage of evaporation of a liquid phase comprising heavy by-products on a surface, in order to form a concentrated phase compris...  
WO/2002/102750A2
A process is provided by which addition of water is used to enhance the production of any hydrochlorocarbon feedstock through the use of Kharasch chemistry, i.e. the combination of a polychlorinated alkane with an olefin to produce a chl...  
WO/2002/100809A2
A process is provided for the stabilization of polychlorinated alkanes against dehydrochlorination. The process comprises adding a phenol compound to a polychlorinated alkane such that the dehydrochlorination of the polychlorinated alkan...  
WO/2002/100941A1
The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. Another object is the use of said nitrile rubber for the manufa...  
WO/2002/099007A1
The present invention provides compositions comprising an HFC component and a non-HFC component consisting essentially of methanol, having boiling points that are unexpectedly low and relatively constant, and uses thereof.  
WO/2002/099005A1
The present invention provides binary azeotrope-like compositions comprising pentafluoroethane (HFC-125) and hydrogen chloride (HCl). In addition, the invnetion relates to methods for removing HFC-125 or HCl from a mixture of HFC-125 and...  
WO/2002/098529A1
The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are ueful as an in...  
WO2002064534A3
The invention relates to a method for producing 1,2-dichloroethane, by reacting ethene with hydrogen chloride and a gas containing oxygen in an oxochlorination reactor to produce a reaction gas. According to said method, the reaction gas...  
WO/2002/094751A2
An oxidative halogenation process involving contacting a reactant hydrocarbon selected from methane, a halogenated C¿1? hydrocarbon, or a mixture thereof with a source of halogen and, preferably, a source of oxygen in the presence of a ...  
WO2002076176A3
The invention relates to mixtures of 1,1,1,3,3-pentafluoropropane and 1,1,1,3,3-pentafluorobutane. The blends are useful as blowing agents for polymer foam, solvents, aerosol propellants and heat transfer media.  
WO/2002/088148A1
The ability to design and construct solid-state materials with pre-determined structures is a grand challenge in chemistry. An inventive strategy based on reticulating metal ions and organic carboxylate links into extended networks has b...  
WO/2002/085823A1
A method for continuous production of a perfluoroalkyl iodide telomer represented by the general formula: R¿f?(CF¿2?)nI, wherein R¿f? represents a perfluoroalkyl group having one to six caron atoms, and n is an integer of 1 to 4, char...  

Matches 451 - 500 out of 6,214