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WO/2003/080549A1 |
A high-purity pentafluoroethane is produced through a process comprising (1) a step of fluorinating tetrachloroethylene to obtain a crude pentafluoroethane containing impurities and (2) a step of bringing the crude pentafluoroethane cont...
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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.
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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...
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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...
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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).
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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...
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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 ...
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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...
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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...
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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. ...
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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...
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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...
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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?CHÂ...
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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...
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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...
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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.
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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...
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WO/2003/020684A1 |
The present invention describes immobilized haloenamine reagents, immobilized tertiary amides, methods for their preparation, and methods of use.
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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...
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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...
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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°...
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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...
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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...
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WO/2003/002251A2 |
A process for preparing a fluorination catalyst using a low pressure activating step followed by a high pressure activating step.
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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 ...
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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...
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WO2001058841A9 |
A method of treating a fluorocarbon feedstock includes generating, in a high temperature zone, an electrical arc between at least one cathode and at least one anode, generating in the high temperature zone and by means of the electrical ...
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WO/2002/076915A2 |
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...
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WO/2002/076176A2 |
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.
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WO/2002/076913A2 |
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...
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WO/2002/077117A2 |
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...
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WO/2002/066408A2 |
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...
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WO/2002/064534A2 |
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...
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WO/2002/064535A1 |
The invention relates to a method and a device for producing 1,2-dichloroethane by reacting ethylene with hydrogen chloride and an oxygen-containing gas in an oxychlorination reactor having a fluidised bed, in order to form a reaction ga...
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WO/2002/062735A1 |
A method for producing a mixture of fluoroalkyl iodide telomers which is represented by the formula: R¿f?(CF¿2?CF¿2?)¿n?I, wherein R¿f? represents a fluoroalkyl group having a carbon number of 1 to 10, and has a value for n of k or ...
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WO/2002/060845A1 |
In the synthesis of 1,1,1,3,3-pentafluorobutane (R-365mfc), a mixture of R-365mfc and the impurity 1,1,1,3-tetrathioro-2-butene (R-1354zd) is purified and R-1354zd is removed from the mixture by contacting the mixture with 1-5 mols of ch...
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WO/2002/059230A2 |
The invention relates to azeotropic and azeotrope-like mixtures of 1,2,2-trichloro-1,3,3,3-tetrafluoropropane (HCFC-224aa) and hydrogen fluoride, which are useful as intermediates in the production of HCFC-224AA.
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WO/2002/059068A2 |
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.
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WO/2002/059067A1 |
Disclosed is an improved HFC manufacturing processes of the type which produces an intermediate product stream that includes a mixture of HF and at least one compound, usually an HCFC, which is relatively resistant to further fluorinatio...
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WO/2002/055457A2 |
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 ...
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WO/2002/055459A2 |
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...
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WO/2002/044116A1 |
The invention relates to a method for producing very pure 1,2-dichloroethane in terms of chloral and/or chloral hydrate and carbon dioxide. The method comprises an oxychlorination of ethylene with hydrogen chloride and a gas containing o...
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WO/2002/030563A2 |
The invention relates to a method and a system for dissolving poorly soluble salt, in particular sodium chloride and other poorly soluble salts in 1,2-dichlorethane, which can be predominantly used in direct chlorination systems for prod...
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