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| Number | Title | Issue Date |
| 7906693 | Processes for producing 2,3,3,3-tetrafluoropropene, a process for producing 1-chloro-2,3,3,3-pentafluoropropane and azeotropic compositions of 1-chloro-2,3,3,3-tetrafluoropropene with HF A process is disclosed for making CH2═CFCF3. The process involves contacting CH2ClCF2CF3 with H2 in a reaction zone in the presence of a catalyst including a catalytically effective amount of pallad... | 03/15/2011 |
| 7348461 | Processes for halogenating compounds 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 isomerically pure CFC-216aa. Other... | 03/25/2008 |
| 7329786 | Processes for producing CFCFHCF 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 isomerically pure CFC-216aa. Other... | 02/12/2008 |
| 7223892 | Process for the separation of a mixture comprising at least one hydrofluoroalkane Process for the separation of a mixture comprising at least one hydrofluoroalkane and hydrogen fluoride, according to which a hydrofluoroalkane/hydrogen fluoride mixture is reacted with at least one chlorinated or chlorofluorinated precursor of the hydrofluoroalkane... | 05/29/2007 |
| 7217678 | Cobalt-substituted chromium oxide compositions, their preparation, and their use as catalysts and catalyst precursors A crystalline alpha-chromium oxide where from about 0.05 atom % to about 6 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by trivalent cobalt (Co+3) atoms is disclosed. Also disclosed is a chromium-containing catalyst compos... | 05/15/2007 |
| 7214839 | Method of making hydrofluorocarbons A manufacturing process for making hydrofluorocarbons (HFCs), by reacting a hydrochlorocarbon and HF in a liquid phase catalytic reactor using a large mole ratio of HF to hydrochlorocarbon to minimize formation of high boiling by-products and improve HF consumption ... | 05/08/2007 |
| 7109386 | Method for preparing a halogenated olefin Process for the preparation of a halogenated olefin by reaction of an alkyne and/or of an allene compound with a hydrogen halide in a liquid medium comprising at least one hydrohalogenation catalyst comprising at least one palladium compound. ... | 09/19/2006 |
| 7094934 | Production process of hydrofluorocarbons In a process for producing a hydrogen-containing fluorinated hydrocarbon in which a halogenated hydrocarbon reaction raw material, which includes a chlorinated alkene and/or a hydrogen-containing chlorinated alkane, is subjected to a fluorination reaction with hydro... | 08/22/2006 |
| 7071368 | Method of making 1,1,1-trifluoroethane A process for producing 1,1,1-trifluoroethane (HFC-143a) which process comprises reacting hydrogen fluoride with vinylidene chloride along with one or more of 1,1,-dichloro-1-fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane (HCFC-142b) and 1,1,1-trichloroethane... | 07/04/2006 |
| 7038095 | Method for producing fluoroalkyl iodide telomer mixture and method for producing mixture fluorine-containing (meth) acrylate esters A mixture of fluoroalkyl iodide telomers represented by the formula: Rf(CF2CF2)nI wherein Rf represents a fluoroalkyl group whose number of carbon atoms is in the range of 1 to 10, with the polymerization degree... | 05/02/2006 |
| 7012165 | Oxidative fluorination of aromatic and chloroaromatic derivatives The subject invention provides methods of fluorinating an aromatic or chloroaromatic compound comprising combining an aromatic compound, a chloroaromatic compound, a mixture of aromatic compounds, a mixture of chloroaromatic compounds, or a mixture of chloroaromatic... | 03/14/2006 |
| 6706935 | Catalytic equilibration to increase the relative mole fraction of CF3CHCI, CF3CHCI2 or CF3CF2H in a composition 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 ... | 03/16/2004 |
| 6521199 | Regeneration of onium fluoride-HF adducts Hydrogen fluoride adducts and ammonium fluorides are used for fluorinating acid chlorides and halocarbon compounds such as chloroalkanes or chloronated ethers. The used adducts can be regenerated and then reused in the fluorination reactions.... | 02/18/2003 |
| 6479717 | Process for eliminating chlorine from chlorofluorocarbons A gaseous process for eliminating chlorine atoms from a chlorofluorocarbon (CFC) of formula Cn Fx Cly, wherein n is an integer from 1 to 3 and x+y=2n+2, wherein said compound is reacted with an hydrofluorocarbon of formula... | 11/12/2002 |
| 6437200 | Process for obtaining pentafluoroethane by chlorotetrafluoroethane dismutation A gaseous process for obtaining pentafluoroethane by dismutation of chlorotetrafluoroethane in the presence of a supported catalyst, said catalyst being formed of a mixture of trivalent chromium oxide with at least an alkaline-earth metal oxide selected f... | 08/20/2002 |
| 6417413 | Process for the preparation of halogenated ethanes A process for preparing halogenated ethanes, particularly pentafluoroethane, from a mixture produced by the reaction of perchloroethylene, hydrogen fluoride and a recycle stream. The preferred process utilizes phase separation techniques to ensure that le... | 07/09/2002 |
| 6323379 | Process for obtaining pentafluoroethane by tetrafluorochloroethane dismutation A process for obtaining pentafluoroethane HFC 125 by dismutation of gaseous tetrafluorochloroethane HCFC 124, at temperatures in the range 200°-300° C., on a trivalent chromium oxide (Cr2 O3) catalyst, supported on aluminum fluorid... | 11/27/2001 |
| 6300529 | Process for preparing HCFC-123 Process for preparing HCFC-123 with a content of olefins lower than 10 ppm and very small amounts of HCFC-123a and 123b by dismutation of HCFC-124 in gaseous phase by contact with a catalyst which essentially consists of three valence chromium oxide suppo... | 10/09/2001 |
| 6274780 | Catalysts for halogenated hydrocarbon processing and their preparation and use A process is disclosed for changing the fluorine content of halogenated hydrocarbons containing from 1 to 6 carbon atoms, in the presence of a multiphase catalyst. The process involves producing the catalyst by heating a single phase solid catalyst precur... | 08/14/2001 |
| 6235951 | Method for producing 1,1,1,3,3-pentafluoropropane The present invention relates to a method for producing 1,1,1,3,3-pentafluoropropane. This method includes the steps of (a) adding hydrogen fluoride to 1-chloro-3,3,3-trifluoropropene in the presence of an addition catalyst to obtain 1,1,1,3-tetrafluoro-3... | 05/22/2001 |
| 6204418 | Process for the chlornation of hydrocarbons A process is provided for the chlorination of aliphatic hydrocarbons containing 1 to 4 carbon atoms using hydrogen chloride as the source of chlorine. The process comprises reaction steps operated in tandem in separate zones. First, an unsaturated aliphat... | 03/20/2001 |
| 6028026 | Cubic chromium trifluoride and its use for halogenated hydrocarbon processing This invention provides a crystalline chromium fluoride having a cubic crystal structure (i.e., chromium trifluoride having an X-ray diffraction powder pattern as shown in Table I); and a catalytic composition comprising cubic chromium trifluoride. This i... | 02/22/2000 |
| 5847242 | Catalysts for halogenated hydrocarbon processing, their precursors and their preparation and use A process is disclosed for changing the fluorine content of halogenated hydrocarbons containing from 1 to 6 carbon atoms, in the presence of a multiphase catalyst, which is characterized by preparing certain single phase solid catalyst precursors containi... | 12/08/1998 |
| 5841006 | Process for preparing pentafluoroethane Process for preparing pentafluoroethane (125) containing amounts of 115 lower than 0.02% by weight wherein pentafluoroethane is obtained by a dismutation process of tetrafluorochloroethane CF3 CHClF (HCFC-124) in gaseous phase in the presence o... | 11/24/1998 |
| 5672785 | Process for producing 1,1-dichloro-12,2,2-tetrafluoroethane A process for producing 1,1-dichloro-1,2,2,2-tetrafluoroethane, which comprises isomerizing 1,1,2-trichloro-1,2,2-trifluoroethane to form 1,1,1-trichloro-2,2,2-trifluoroethane, followed by fluorination with hydrofluoric acid.... | 09/30/1997 |
| 5600037 | Process for isomerizing 1,1,2-trifluoro-1,2-dichloroethane to 1,1,1-trifluoro-2,2-dichloroethane 1,1,2-trifluoro-1,2-dichloroethane (Al23a) is isomerized to 1,1,1-tri-fluoro-2,2-dichloroethane (Al23) by contacting it with AlF3 at temperatures ranging from 180° to 400° C. Advantageously, it is operated with mixtures of Al23a with Al23 and... | 02/04/1997 |
| 5414167 | Process for purifying 1,1,1-trifluoro-2,2-dichloroethane from isomer 1,1,2-trifluoro-1,2-dichloroethane The 1,1,2-trifluoro-1,2-dichloroethane content is reduced or removed from 1,1,1-trifluoro-2,2-dichloroethane by contacting a gaseous mixture comprising said compounds with chrome oxide (Cr2 O3) either as such or supported, at tempera... | 05/09/1995 |
| 5406009 | Catalytic equilibration to improve the relative yield of selected halocarbons Gas phase and liquid phase processes are disclosed which use interconversion of CF3 CHFCl and CF2 HCF2 Cl in contact with catalyst consisting essentially of halided aluminum oxide and/or aluminum halide at elevated tempera... | 04/11/1995 |
| 5345014 | Process for preparing pentafluoroethane by dismutation of tetrafluorochloroethane Pentafluoroethane (HFC 125) is selectively prepared by dismutation of tetrafluorochloroethane (HCFC 124) effected by contacting the latter, in the gas phase, with a Cr2 O3 catalyst at temperatures ranging from 150° to 330° C. Along... | 09/06/1994 |
| 5345017 | Process for reducing the fluorine content of halocarbons The fluorine content of an acyclic saturated compound of the formula Cn Fa Xb having at least one carbon with at least two fluorine substituents (wherein each X is independently selected from Cl and Br, and wherein n is 1 ... | 09/06/1994 |
| 5336818 | Process for the preparation of substantially fluorinated alkyl bromides According to the process according to the invention, substantially fluorinated alkyl bromides, preferably perfluoroalkyl bromides, are prepared by reaction of substantially fluorinated alkyl iodides with organic bromine compounds in which the bromine atom... | 08/09/1994 |
| 5262556 | Process for the reaction of halogenated aromatics with electrophiles The invention relates to a process for the reaction of fluorinated or chlorinated aromatics with electrophiles at the ortho position relative to the fluorine or chlorine atom, characterized in that a strong base is added to a mixture of the fluorinated or... | 11/16/1993 |
| 5175379 | Process for the preparation of partly flourinated ethanes A process for the preparation of partly fluorinated ethanes of the general formula CF3 --CFHx Cl2-x in which x=0, 1 or 2, is indicated which comprises reacting, as the reactant, partly fluorinated ethane of the general formula ... | 12/29/1992 |
| 5146020 | Disproportionation of selected chlorofluoromethanes Trifluoromethane or monochlorodifluoromethane and carbon tetrachloride are converted to trichloromonofluoromethane, dichlorodifluoromethane and chloroform using a catalyst of activated aluminum and magnesium oxides.... | 09/08/1992 |
| 5030372 | Catalytic equilibration to improve the relative yield of selected halocarbons Gas phase and liquid phase processes are disclosed which use interconversion of CF3 CHFCl and CF2 HCF2 Cl in contact with catalyst consisting essentially of halided aluminum oxide and/or aluminum halide at elevated tempera... | 07/09/1991 |
| 5017732 | Process for preparing chlorofluorocarbons via an in situ generated activated aluminum trihalide catalyst and products resulting therefrom A process for isomerizing a chlorofluorocarbon of the formula: CClFYCClFX wherein X and Y are independently selected from chlorine and fluorine provided that X is not --Cl when Y is --F to the compound of the formula: CCl2 YCF2 X The process c... | 05/21/1991 |
| 5008476 | Process for the preparation of 1,1,1,2-tetrafluoroethane Improved process for the preparation of 1,1,1,2-tetrafluoroethane by the steps of chlorofluorination of selected organic compounds using Cl2 and HF followed by hydrogenolysis of the resulting products, the improvement residing in the use of exc... | 04/16/1991 |
| 4837370 | Manufacture of difluorochloromethane A vapor phase process is disclosed for the selective disproportionation of fluorodichloromethane to difluorochloromethane and chloroform using a solid catalyst of an activated mixture of iron oxide and rare earth oxides.... | 06/06/1989 |
| 4734503 | Catalytic transhalogenation of haloaromatics Catalytic transhalogenation of haloaromatics according to the equation: wherein: when Cz is a benzene derivative, a+b=5; e=0; c+d=5; z=6; when Cz is a pyridine derivative, a+b=4; e=1; c+d=4; z=5; when Cz is a naphthalene derivative, a+b=... | 03/29/1988 |
| 4699991 | Methods of using silacrown ethers as catalysts Organosilicon compounds referred to as silacrown ethers or "silacrowns" are of the general formula: ##STR1## where R1 and R2 are organic radicals or hydrogen and n is an integer between 4 and 10 inclusive. Silacrown ethers are p... | 10/13/1987 |
