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| Number | Title | Issue Date |
| 7985884 | Process to manufacture 2,3,3,3-tetrafluoropropene Disclosed is a process for the manufacture of 2,3,3,3-tetrafluoropropene comprising: (a) dehydrofluorinating 1,1,1,2,3-pentafluoropropane in the presence of a dehydrofluorination catalyst comprised of chromium (III) oxide, and alkali metal, to produce a product mixt... | 07/26/2011 |
| 7714177 | Processes for synthesis of 1,3,3,3-tetrafluoropropene Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene comprising: a) reacting a compound of the formula (I) CHFX2 with a compound of formula (II) CH2═CF2 to produce a reaction product comprising a compound of formu... | 05/11/2010 |
| 7371904 | Processes for synthesis of 1,3,3,3-tetrafluoropropene Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene which comprises, in one embodiment, reacting a compound of CF3X1 with a compound of CX2H═CHX3, wherein X1, X2, and X3 | 05/13/2008 |
| 7368089 | Systems and methods for producing fluorocarbons Systems and methods for producing fluorocarbons are provided that include contacting a saturated halogenated fluorocarbon with hydrogen and catalyst to produce a saturated hydrofluorocarbon and an unsaturated fluorocarbon. Aspects of the present invention describe s... | 05/06/2008 |
| 7345209 | Processes for synthesis of 1,3,3,3-tetrafluoropropene Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene that comprises, in one preferred embodiment, providing a compound of the formula CF3CH2CHFX, wherein X is a selected from the group consisting of chlorine, bromine and iodin... | 03/18/2008 |
| 7312367 | Method of making 1,1,3,3,3-pentafluoropropene The invention provides an economic process for the manufacture of the hydrofluorocarbon 1,1,3,3,3-pentafluoropropene (HFC-1225zc). HFC-1225zc can be made from the dehydrochlorination of 1-chloro-1,1,3,3,3-pentafluoropropane (HCFC-235fa). Alternatively, HFC-1225zc ca... | 12/25/2007 |
| 7271301 | Synthesis of perfluoroolefins A gold-lined pyrolysis reactor is used to pyrolyze compounds to form fluoroolefins like tetrafluoroethylene and hexafluoropropylene in high yield, with minimum to no formation of perfluoroisobutylene, chlorotrifluoroethylene, coke, salts, or polymer. ... | 09/18/2007 |
| 7268261 | Production processes Methods and materials are disclosed for the recovery of valuable hydrofluorocarbons and subsequent conversion to environmentally inert compounds. More specifically methods and materials are provided for recovering hydrofluorocarbons such as HFC-227, HFC-236, HFC-245... | 09/11/2007 |
| 7250539 | Materials and methods for the conversion of hydrofluorocarbons Methods and materials are disclosed for the recovery of valuable hydrofluorocarbons and subsequent conversion to environmentally inert compounds. More specifically methods and materials are provided for recovering hydrofluorocarbons such as HFC-227, HFC-236, HFC-245... | 07/31/2007 |
| 7230146 | Process for producing fluoropropenes Dehydrohalogenation processes for the preparation of fluoropropenes from corresponding halopropanes, in which the fluoropropenes have the formula CF3CY═CXNHP, wherein X and Y are independently hydrogen or a halogen selected from fl... | 06/12/2007 |
| 7189884 | Processes for synthesis of tetrafluoropropene Disclosed in one embodiment is a process for the synthesis of 1,3,3,3-tetrafluoropropene that comprises (a) reacting a compound of formula (I) X1X2 with a compound of formula (II) CF3CH═CH2 to produce a reaction product ... | 03/13/2007 |
| 7164050 | Preparation of halo-olefin A process for preparing a halo-olefin to minimize one or more side reactions which form at least one impurity, said process comprising contacting a halogenated hydrocarbon with a metal dehalogenating agent dissolved in a solvent under conditions sufficient to dehalo... | 01/16/2007 |
| 7091388 | Method of making 1,1,3,3,3-pentafluoropropene The invention provides an economic process for the manufacture of the hydrofluorocarbon 1,1,3,3,3-pentafluoropropene (HFC-1225zc). HFC-1225zc can be made from the dehydrochlorination of 1-chloro-1,1,3,3,3-pentafluoropropane (HCFC-235fa). Alternatively, HFC-1225zc ca... | 08/15/2006 |
| 7030283 | Process for producing 1,1-difluorovinyl cycloaliphatic compounds This invention relates to a process for the preparation of 1,1-difluoroolefins, e.g., difluorovinyl cycloaliphatic compounds such as difluorovinylcyclohexane and derivatives by the dehydrofluorination of a trifluoromethyl-substituted cycloaliphatic compound and the ... | 04/18/2006 |
| 7026521 | Methane and methyl chloride as selective reducing agent in the transformation of hydrochlorofluorocarbons or chlorofluorocarbons to hydrofluorocarbons A gas phase reaction process for producing a hydrofluorocarbon from a hydrochlorofluorocarbon or chlorofluorocarbon reactant by contacting, in the presence of a catalyst, the hydrochlorofluorocarbon or chlorofluorocarbon reactant with a reducing agent selected from ... | 04/11/2006 |
| 6548720 | Process for the manufacture of 1,1,1,3,3-pentafluoropropene, 2-chloro-pentafluoropropene and compositions comprising saturated derivatives thereof A process is disclosed for producing the pentfluropropenes of the formula CF3 CX.dbd.CF2, where X is H or Cl. The process involves hydrodehalogenating CF3 CCl2 CF3 with hydrogen at an elevated tempera... | 04/15/2003 |
| 6548719 | Process for producing fluoroolefins A process for producing a fluoroolefin of the formula: CF3 CY.dbd.CXn Hp wherein Y is a hydrogen atom or a halogen atom (i.e., fluorine, chlorine, bromine or iodine); X is a hydrogen atom or a halogen atom (i.e., fluorine,... | 04/15/2003 |
| 6476281 | Method for the preparation of 1,1,1,3,3-pentafluoropropene and 1,1,1,3,3-pentafluoropropane 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 metal-containing ... | 11/05/2002 |
| 6380446 | Process for dehydrohalogenation of halogenated compounds Halogenated compounds are dehydrohalogenated in a multi-stage bubble reactor wherein agitation of the reactor contents is provided by in situ generation and vaporization of reaction product having a boiling point lower than that of the reactants.... | 04/30/2002 |
| 6376727 | Processes for the manufacture of 1,1,1,3,3-pentafluoropropene, 2-chloro-pentafluoropropene and compositions comprising saturated derivatives thereof Disclosed are azeotropic compositions comprising CF3 CHFCF3 and HF. Also disclosed are compositions and a process for producing compositions comprising (c1) CF3 CHFCF3, CF3 CH2 CF3 | 04/23/2002 |
| 6369284 | Catalytic manufacture of pentafluoropropenes A process is disclosed for the manufacture of a pentafluoropropene of the formula: CFX.dbd.CYCF3 where X is selected from H and F and where Y is F when X is H and Y is H when X is F. The process involves contacting a hexafluoropropane of the fo... | 04/09/2002 |
| 6359183 | Treatment of chromium oxide and catalytic manufacture of vinyl fluoride Advantageous processes are disclosed for the production of vinyl fluoride. Also disclosed are advantageous methods which may be employed for the preparation of catalysts useful in such processes. Included are methods which involve (i) reducing surface B | 03/19/2002 |
| 6166156 | Method for making photocurable halofluorinated acrylates Halofluorinated alkylene monomers are made by a method comprising the steps of: (a) subjecting a first polymer which is the reaction product of a fluorinated vinyl monomer and a vinyl comonomer to dehydrohalogenation to form a second polymer; (b) treating... | 12/26/2000 |
| 6093859 | Process for the manufacture of 1,1,1,3,3-pentafluoropropane A process is disclosed for producing the hydrofluorocarbon CF3 CH.dbd.CF2. The process involves dehydrofluorinating CF3 CH2 CF3 at an elevated temperature in the vapor phase over a catalyst of (1) alu... | 07/25/2000 |
| 6018083 | Process for the production of fluorocarbons A process is disclosed for the separation of a mixture of HF and CF3 CClFCF3. 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 mai... | 01/25/2000 |
| 5945573 | Process for the manufacture of 1,1,1,3,3-pentafluoropropane A process is disclosed for producing the hydrofluorocarbon CF3 CH2 CHF2. The process involves dehydrofluorinating CF3 CH2 CF3 at an elevated temperature in the vapor phase over a catalyst o... | 08/31/1999 |
| 5880315 | Catalytic manufacture of vinyl fluoride A process for the manufacture of vinyl fluoride (i.e., CH2 .dbd.CHF, VF or 1141) from 1,1-difluoroethane (i.e., CH3 CHF2, F152a or HFC-152a) is disclosed which involves contacting the 1,1-difluoroethane at an elevated temp... | 03/09/1999 |
| 5868943 | Waste treatment process for the disposal of dichlorodifluoromethane by conversion into polytetrafluoroethylene A saturated solution of an alkaline earth or alkali metal halide salt is electrolyzed in a flowing mercury cathode electrolysis cell. The amalgam is added dropwise to a solution of dichlorodifluoromethane in a solution of a polar, aprotic solvent, not red... | 02/09/1999 |
| 5750808 | Dehydrohalogenation processes A process is disclosed for the dehydrohalogenation of partially halogenated ethanes of the formula C2 Ha Clb Fc where a is an integer from 1 to 4, b is an integer from 0 to 3 and c is an integer form 1 to 5 to p... | 05/12/1998 |
| 5679875 | Method for manufacturing 1,1,1,2,3-pentafluoropropene 1,1,1,2,3-pentafluoropropane The present inventions provide manufacturing methods of 1,1,1,2,3-pentafluoropropene characterized by the reaction of removing HF by means of the contact of 1,1,1,2,3,3-hexafluoropropane in the gas state with active carbon or active carbon added with meta... | 10/21/1997 |
| 5621147 | Trifluoro-2-(trans-4-substituted cyclohexyl) ethylenes and process for their production A 1,1,2-trifluoro-2-(trans-4-substituted cyclohexyl)ethylene of the formula (1): R--(A)m --Cy--CF=CF2 (1) wherein R is a C1-10 alkyl group, a halogen atom or a cyano group, provided that in the case ... | 04/15/1997 |
| 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 |
| 5481050 | Processes for the preparation of fluorinated olefins and hydrofluorocarbons using fluorinated olefin The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF2 CH=CH2 where R is Cx Cly Fz and y+z=2×+1. The invention is also directe... | 01/02/1996 |
| 5463150 | Process for preparing hexafluorobutene 1,1,1,4,4,4-Hexafluorobut-2-ene is prepared from chloro-fluorobutanes of the formula (I) CF3 --CH2 --CHCl--CX3 (I) in which the individual radicals X independently of each other represent chlorine and/or f... | 10/31/1995 |
| 5446217 | Processes for the preparation of fluorinated olefins and hydrofluorocarbons using fluorinated olefin The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF2 CH=CH2 where R is Cx Cly Fz and y+z=2x+1. The invention is also directed... | 08/29/1995 |
| 5396000 | Process for the manufacture of 1,1,1,2,3,-pentafluoropropane A process is disclosed for producing CF3 CHFCH2 F using vapor phase catalytic dehydrohalogenation to produce CF3 CF.dbd.CHF and HF, followed by vapor phase catalytic hydrogenation of CF3 CF.dbd.CHF in the presen... | 03/07/1995 |
| 5387729 | Catalytic compositions, process for obtaining them and process for hydrogenation of 1,1,2-trichloro-1,2,2,-trifluoroethane by means of these compositions The invention relates to catalytic compositions for the hydrogenation of 1,1,2-trichloro-1,2,2-trifluoroethane to chlorotrifluoroethylene and trifluoroethylene comprising a porous oxygenated support impregnated with a metal of group VIII of the periodic t... | 02/07/1995 |
| 5258561 | Catalytic chlorofluorination process for producing CF3 CHClF and CF3 CHF2 A chlorofluorination process is disclosed which employs a catalyst comprising chromium oxide for producing halohydrocarbons of the formula CHXFCF3 (where X is selected from Cl and F). The process is characterized by feeding a combination of com... | 11/02/1993 |
| 5180860 | Dehydrohalogenation process A process for the dehydrohalogenation of saturated hydrogen-containing polyhalocarbons using liquid alkali metal acid fluoride and/or alkali metal fluoride compositions to form haloolefins.... | 01/19/1993 |
| 5089454 | Catalytic composition for hydrogenation of chlorofluoroalkenes The invention relates to catalytic compositions for the hydrogenation of chlorofluoroalkenes to fluoroalkenes, comprising a porous carrier impregnated with metal of group VIII of the Periodic Table of the elements and with one or more compounds chosen fro... | 02/18/1992 |
