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| Number | Title | Issue Date |
| 7161049 | Process for purifying hydrofluoropropanes A process is disclosed for purifying a hydrofluoropropane of undesirable C2–C4 olefinic and C1–C4 saturated chlorinated impurities, comprising the steps of: contacting a first mixture of hydrofluoropropane, olefinic im... | 01/09/2007 |
| 7122704 | Fluoroketone compounds The present invention relates to new fluoroketone compounds from the groups monobromoperfluoroketones, monohydromonobromoperfluoroketones, (perfluoroalkoxy)monobromoperfluoroketones, (fluoroalkoxy)monobromoperfluoroketones, and monochloromonobromoperfluoroketones. T... | 10/17/2006 |
| 7087788 | Fluorosulfone compounds The present invention relates to new fluorosulfone compounds. These fluorosulfone compounds have utility in preventing, controlling and extinguishing fire. ... | 08/08/2006 |
| 6900362 | Vapor phase production of 1,1,1,2,3,3,3-heptafluoropropane from hydrogen fluoride and hexafluoropropylene A process for the production of HFC-227ea from HF and HFP is provided. This process takes advantage of an azeotropic composition of HF and HFC-227ea in order to produce HFC-227ea essentially free of HF and recycle unreacted HF back to the reactor. The recycle of sai... | 05/31/2005 |
| 6855370 | Fluoropolymer interlayer dielectric by chemical vapor deposition A process is disclosed for forming a fluoropolymer layer on a thin film device, comprising contacting said thin film device with a gas phase fluoromonomer, and initiating polymerization of said fluoromonomer with a free radical polymerization initiator whereby said ... | 02/15/2005 |
| 6303838 | Separating 1,1,1,3,3-pentafluoropropane from hydrogen fluoride Disclosed are processes for separating 1,1,1,3,3-pentafluoropropane (HFC-245fa) from hydrogen fluoride (HF) by distillation, wherein hydrocarbons, chloroflurocarbons, hydrochlorofluorocarbons and fluorocarbons are used as entraining agents. The processes ... | 10/16/2001 |
| 6291727 | Azeotropic or azeotrop-like compositions of hydrofluoric acid with dihaloethanes The instant invention relates to azeotropic or azeotrope-like compositions of hydrofluoric acid with at least one of 1,1-dichloroethane, 1-chloro-1-fluoroethane and 1,1 -difluoroethane. The invention also relates to manufacturing processes for separating ... | 09/18/2001 |
| 6229058 | Preparation of fluorinated propanes and pentanes The instant invention relates to producing fluorinated propanes and pentanes. More particularly it relates to producing perhalofluoropropanes and pentanes by reacting dihalodifluoromethanes with polyfluoroethylenes, notably tetrafluoroethylene (TFE) and c... | 05/08/2001 |
| 6224844 | Process for the production of calcium fluoride A process is disclosed for producing calcium fluoride comprising: (a) mixing aqueous H3 PO4 with aqueous H2 SiF6 to form a mixture such that the concentration of H3 PO4 is at least about 3 ... | 05/01/2001 |
| 6221830 | Purification process for hexafluoroethane products The disclosure relates to removing impurities from hexafluoroethane (CF3 CF3), also known as Perfluorocarbon 116 (PFC-116) or Fluorocarbon 116 (FC-116), by using azeotropic distillation such that an overhead product consisting essent... | 04/24/2001 |
| 6207869 | Process for perhalofluorinated butanes and hexanes The instant invention relates to producing perhalofluorobutanes and perhalofluorohexanes, more particularly it relates to their production by utilizing tetrafluoroethylene (hereinafter referred to as "TFE") and chlorotrifluoro-ethylene (hereinafter referr... | 03/27/2001 |
| 6156161 | Extractive distillation process for separating difluoromethane and pentafluoroethane using methylene chloride A process is disclosed for removing chloropentafluoroethane (CFC-115) from a mixture comprising CFC-115, difluoromethane (HFC-32), pentafluoroethane (HFC-125), or from mixtures of these compounds, by azeotropic or extractive distillation.... | 12/05/2000 |
| 6066768 | Perhalofluorinated butanes and hexanes The instant invention relates to producing perhalofluorobutanes and perhalofluorohexanes, more particularly it relates to their production by utilizing tetrafluoroethylene (hereinafter referred to as "TFE") and chlorotrifluoro-ethylene (hereinafter referr... | 05/23/2000 |
| 5985939 | Processes for producing aerosol propellants that include butane or isobutane The invention relates to the discovery of compositions useful as aerosol propellants that include a first component of butane or isobutane and a second component of 2-fluoropropane (HFC-281 ea) or 1-fluoropropane (HFC-282 fa).... | 11/16/1999 |
| 5935390 | Producing chlorine and hydrogen from hydrogen chloride by plasma process A process is disclosed for converting hydrogen chloride (HCl) to molecular chlorine (Cl2) and molecular hydrogen (H2), and more particularly to such process conducted in a plasma environment.... | 08/10/1999 |
| 5900044 | Organic separation from HF A process is disclosed for separating HF from organics by passing a mixture of HF and organics through a column or bed containing a polymer which sorbs the HF leaving an essentially pure organic stream. The HF may be recovered from the polymer, or the org... | 05/04/1999 |
| 5874657 | Process for the purification of 1,1-difluoroethane The present invention relates to processes for separating 1,1-difluoroethane (HFC-152a) from vinyl chloride by using extractive distillation with an extractive agent selected from the aliphatic hydrocarbons, chlorocarbons and alcohols.... | 02/23/1999 |
| 5789633 | Azeotropic or azeotrope-like compositions of hydrofluoric acid with dihaloethanes The instant invention relates to azeotropic or azeotrope-like compositions of hydrofluoric acid with at least one of 1,1-dichloroethane, 1-chloro-1-fluoroethane and 1,1-difluoroethane. The invention also relates to manufacturing processes for separating h... | 08/04/1998 |
| 5772852 | Separating HCI and halocarbons A process for separating HCl from pentafluoroethane, chloropentafluoroethane, chlorotrifluoroethane, trifluoromethane, and other fully saturated and unsaturated fluorocarbons, chlorofluorocarbons and chlorocarbons.... | 06/30/1998 |
| 5770779 | Process for preparation of fluorinated hydrocarbons This invention is a process for the selective preparation of fluorinated hydrocarbons from chlorinated hydrocarbons while minimizing formation of oligomeric and polymeric byproducts. The process comprises providing a liquid phase containing chlorinated hy... | 06/23/1998 |
| 5723429 | Azeotropic or azeotrope-like compositions of tetrafluoroethane and chlorotetrafluoroethane The disclosure relates to separating 1,1,2,2 tetrafluoroethane (HFC-134) and 1,1,1,2 tetrafluoroethane (HFC-134a) from each other and/or from fluorocarbon impurities by using extractive distillation with an extractive agent comprising an alcohol. Examples... | 03/03/1998 |
| 5718807 | Purification process for hexafluoroethane products The disclosure relates to removing impurities from hexafluoroethane (CF3 CF3), also known as PerFluoroCarbon 116 (PFC-116) or FluoroCarbon 116 (FC-116), by using azeotropic distillation such that an overhead product containing an HCl... | 02/17/1998 |
| 5663478 | Recovery of aluminum and/or fluoride values from used aluminum chlorofluorides A process is disclosed for treating used aluminum chlorofluoride catalyst either alone or mixed with organics. It involves forming a solution of the catalyst in water or an aqueous acid and then adjusting the pH and/or composition of the aqueous phase for... | 09/02/1997 |
| 5591699 | Particle transport fluids thickened with acetylate free xanthan heteropolysaccharide biopolymer plus guar gum A non-acetylated but otherwise unmodified xanthan heteropolysaccharide polymer plus guar gum, is employed to impart viscosity to an aqueous particle transport fluid (such as a drilling fluid, a fracturing fluid, or a filter structure emplacement fluid) su... | 01/07/1997 |
| 5534151 | Process for separating and recovering halocarbons from mixtures thereof A process is disclosed for separating components of an azeotropic or azeotrope-like mixture containing only organic compounds at least one of which compound is a halocarbon comprising contacting said azeotropic or azeotrope-like mixture with a semipermeab... | 07/09/1996 |
| 5531975 | Process for the production of phosphoric acid and calcium fluoride Fluosilicic acid is reacted with phosphate rock in order to produce wet process phosphoric acid and calcium fluoride which is later reacted with sulfuric acid to produce hydrogen fluoride and calcium sulfate. The hydrogen fluoride is then stripped from th... | 07/02/1996 |
| 5458674 | Organic separation from HF A process is disclosed for separating HF from organics by passing a mixture of HF and organics through a column or bed containing a polymer which sorbs the HF leaving an essentially pure organic stream. The HF may be recovered from the polymer, or the org... | 10/17/1995 |
| 5456841 | Process for separating and recovering halocarbons from mixtures thereof A process is disclosed for separating components of an azeotropic or azeotrope-like mixture containing only organic compounds at least one of which compound is a halocarbon comprising contacting said azeotropic or azeotrope-like mixture with a semipermeab... | 10/10/1995 |
| 5449846 | Purification of saturated halocarbons A process for reducing the content of unsaturated impurities in saturated fluorohalocarbons and fluorohalohydrocarbons by contacting the impure saturated fluorohalocarbon and/or fluorohalohydrocarbon in a substantially dry fluid state with a substantially... | 09/12/1995 |
| 5449845 | Purification of saturated halocarbons A process for reducing the content of unsaturated impurities in saturated fluorohalocarbons and fluorohalohydrocarbons by contacting the impure saturated fluorohalocarbon and/or fluorohalohydrocarbon in a substantially dry fluid state with a substantially... | 09/12/1995 |
| 5427757 | Process for the production of phosphoric acid and hydrogen fluoride from phosphate rock and fluosilicic acid Fluosilicic acid is reacted with phosphate rock in order to produce wet process phosphoric acid and calcium fluoride which is later reacted with sulfuric acid to produce hydrogen fluoride and calcium sulfate. The hydrogen fluoride is then stripped from th... | 06/27/1995 |
| 5318716 | Azeotrope-like mixtures of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane Azeotrope-like mixtures of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane, being useful as cleaning solvents, refrigerants and foam blowing agents.... | 06/07/1994 |
| 5282968 | Process for separating and recovering halocarbons from mixtures thereof A process is disclosed for separating components of an azeotropic or azeotrope-like mixture containing only organic compounds at least one of which compound is a halocarbon comprising contacting said azeotropic or azeotrope-like mixture with a semipermeab... | 02/01/1994 |
| 5262077 | Halocarbon blends Azeotrope-like blends are disclosed comprising effective amounts of 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1-difluoroethane (HFC-152a) and a halocarbon selected from the group consisting of 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 2-chloro-1,1... | 11/16/1993 |
| 5246617 | Azeotropic compositions of 1,1-dichloro-1-fluoroethane and methanol/ethanol Azeotropic mixtures of 1,1-dichloro-1-fluoroethane (HCFC-141b) with methanol or ethanol, the azeotropic mixtures being useful in solvent cleaning applications.... | 09/21/1993 |
| 5240634 | Ternary azeotropic compositions of 1,1-dichloro-1,2-difluoroethane and cis-1,2-dichloroethylene with methanol or ethanol or n-propanol Azeotropic mixtures of 1,1-dichloro-1,2-difluoroethane (HCFC-132c) and cis-1,2-dichloroethylene (c-HCC-1130) with methanol, or ethanol or n-propanol are useful in solvent cleaning applications, as refrigerants, aerosol propellants and blowing agents.... | 08/31/1993 |
| 5227087 | Constant-boiling, azeotrope-like mixtures of dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane and methanol and/or ethanol Constant boiling, azeotrope-like mixtures of dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane and methanol and/or ethanol, the constant-boiling, azeotrope-like mixtures being useful in solvent cleaning applications.... | 07/13/1993 |
| 5196616 | Process for separating and recovering fluorocarbons and hydrogen fluoride from mixtures thereof A process for separating and recovering an organic phase (e.g., fluorocarbons such as chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons and perfluorocarbons) from a feed stream of a mixture of fluorocarbons and hydrogen fluoride, wherein t... | 03/23/1993 |
| 5194169 | Azeotrope-like refrigerant mixtures of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane Azeotrope-like mixtures of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane, being useful as cleaning solvents, refrigerants and foam blowing agents.... | 03/16/1993 |
| 5182040 | Azeotropic and azeotrope-like compositions of 1,1,2,2-tetrafluoroethane The azeotropic and azeotrope-like compositions of 1,1,1,2-tetrafluoroethane and one of 1,1-difluoroethane, 1-chloro-1,1,-difluoroethane, dimethyl ether, perfluorocyclobutane, n-butane, isobutane and 1,1,1,2,3,3,3-heptafluoropropane, and their use as refri... | 01/26/1993 |
