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WO/2001/025177 |
The invention concerns a method for recovering a co-catalyst of an aqueous phase by treatment with a base and a step which consists in separating the co-catalyst whereby the co-catalyst is isolated from the aqueous phase treated with the...
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WO/2001/025176 |
The invention concerns a method for obtaining halogenated hydrocarbons comprising at least 3 carbon atoms by reacting a haloalkane with an olefin in the presence of a catalyst in an essentially water-free reaction medium.
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WO/2001/021564 |
The invention relates to a method for the production of 1,2-dichlorethane by direct chlorination using chlorine and ethene in which, despite low reaction temperatures during direct chlorination, reaction heat produced is nevertheless use...
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WO/2001/017639 |
In a biomass extraction circuit there is a need for an improved evaporator. An evaporator (12) includes an inlet for a liquid solvent/biomass mixture, the inlet including a spray nozzle (27). The evaporator (12) includes a heated vessel ...
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WO/2001/017933 |
The invention relates to the production of purified, saturated, partially fluorinated and perfluorinated hydrocarbon compounds from raw materials, which are tainted with impurities and absorb light at a wavelength of $g(l) > 200 nm. Said...
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WO/2001/014295 |
A method of treatment by which the content of unsaturated-compound impurities in 1,1,1,3,3-pentafluoropropane (R245fa) is reduced while minimizing the loss of R245fa. R245fa containing unsaturated compounds as impurities is brought into ...
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WO/2001/007384 |
Processes for preparing a variety of fluorocarbons are disclosed. Processes are described wherein the yields of desired products are increased by endlessly converting the undesired products to reactive intermediates. Trifluoroethylene is...
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WO/2000/076658 |
A catalyst for use in the hydrochlorination of methanol which comprises an $g(h)-alumina doped with an alkali metal salt, e.g. caesium chloride, in order to reduce selectivity to demethyl ether and to delay the onset of coking on the cat...
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WO/2000/076945 |
Alkanes containing chlorine can be produced by attaching chlorine to C-C-double bonds or C-C-triple bonds or by exchanging hydrogen for chlorine, by bringing the starting compound in the gas or liquid phase into contact with elementary c...
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WO/2000/071492 |
A process for fluorinating a hydrocarbon substrate is by mixing it with an inert diluent and mixing the diluted substrate with a gaseous fluorinating reagent to form a foam reaction mixture. The fluorinating reagent reacts with the subst...
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WO/2000/069797 |
Preparation of HFC 227ea by reacting HFP with hydrogen fluoride comprising the steps of charging the reaction mixture therefrom to a liquid-phase separator, allowing a HFC 227ea-rich phase and a hydrogen fluoride-rich phase to separate u...
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WO/2000/068170 |
A method of fluorinating a substance comprises providing a reaction mixture comprising a liquid or supercritical carbon dioxide reaction medium, a first reactant, and a second reactant, wherein the first reactant is a fluorinating reagen...
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WO/2000/068172 |
A process for preparing a haloalkane comprising: (a) contacting a haloalkane starting material with a haloalkene starting material in the presence of an effective amount of a catalyst complex under conditions effective to facilitate an a...
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WO/2000/059850 |
A method for the production of 1,1,1,3,3-pentafluoropropene, and particularly to a method characterized by high conversion, yield and selectivity by contacting 2,2-dichloro-1,1,1,3,3,3-hexafluoropropane with hydrogen in the presence of a...
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WO/2000/058241 |
The invention provides a method of selectively fluorinating an organic compound at an unactivated saturated sp?3¿ hybridised carbon atom, the method comprising reacting the compound with a fluorinating agent containing an N-F bond. The ...
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WO/2000/056833 |
Disclosed are binary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) or nonafluoromethoxybutane. The present invention further includ...
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WO/2000/056834 |
The present invention relates to azeotrope-like compression refrigerant compositions consisting essentially of difluoromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,1,2-tetrafluoroethane (HFC-134a) and 0.5-5 weight percent of a hydr...
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WO/2000/056687 |
The invention concerns a method for separating hydrogen fluoride from its mixtures with 1,1,1,3,3-pentafluorobutane by extraction using an organic solvent 1,1,1,3,3-chloro(fluoro)butane.
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WO/2000/055107 |
The invention relates to a method and to a system for producing 1,2 dichloroethane or ethylene (di)chloride (EDC) using a circulating reaction medium and a catalyst. The aim of the invention is to allow a catalytic chlorination of the et...
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WO/2000/053549 |
The invention relates to a process for preparing a fluorinated product, such as 1,1,1,2,3,3,3-heptafluoropropane, comprising reacting a molar excess of an aliphatic starting material such as 1,1,1,3,3,3-hexafluoropropane in the liquid ph...
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WO/2000/037401 |
The invention concerns a method for separating a mixture comprising at least a hydrofluoroalkane and hydrogen fluoride, which consists in reacting a hydrofluoroalkane/hydrogen fluoride mixture with at least a chlorinated or chlorofluorin...
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WO/2000/036046 |
The invention concerns compositions comprising 1,1,1,3,3-pentafluorobutane and more than 5 wt. % of at least a non-flammable fluorinated compound and use thereof.
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WO/2000/035839 |
A process for catalytic addition of haloalkanes to alkenes involving the step of reacting the haloalkane with the alkene in the presence of a catalyst. The catalyst is an organophosphite compound represented by the following formula: P(O...
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WO/2000/034216 |
According to the present invention there is provided a process for the production of a trichloroalkane derivative comprising reacting an alkene derivative with chloroform, characterised in that the process is initiated by photochemical c...
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WO/2000/029361 |
A mixture comprising at least 1,1,1,3,3-pentafluoropropane and 1,1,1-trifluoro-3-chloro-2-propene is subjected to a distillation step to obtain a distillate comprising an azeotropic composition consisting substantially of 1,1,1,3,3-penta...
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WO/2000/021660 |
The invention concerns a hydrofluorination catalyst based on a chromium oxide poor in ammonium salts.
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WO/2000/020362 |
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...
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WO/2000/017136 |
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(...
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WO/2000/017137 |
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...
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WO/2000/015588 |
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...
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WO/2000/014040 |
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...
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WO/2000/003962 |
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-...
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WO/1999/062848 |
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...
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WO/1999/062851 |
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...
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WO/1999/062849 |
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...
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WO/1999/059951 |
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.
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WO/1999/058484 |
An azeotrope-like composition comprising a perfluorobutyl methyl ether and a brominated hydrocarbon. The azeotrope-like composition has excellent dissolving ability.
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WO/1999/058481 |
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...
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WO/1999/057088 |
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...
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WO/1999/052844 |
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...
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WO/1999/051555 |
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...
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WO/1999/051556 |
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...
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WO/1999/051553 |
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...
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WO/1999/050208 |
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...
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WO/1999/050209 |
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...
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WO/1999/048850 |
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.
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WO/1999/048849 |
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...
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WO/1999/048606 |
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...
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WO/1999/044973 |
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...
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WO/1999/043635 |
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...
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