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| Number | Title | Issue Date |
| 7401724 | Brazing flux for dry application A flux based on alkali fluoroaluminate is described which is highly suitable for dry application (“dry fluxing”). This is a flux which is free of fine-grained fraction, which is defined by a range of grain-size distribution. ... | 07/22/2008 |
| 7319175 | Catalyst synthesis of halogenated compounds with catalyst regeneration with elemental halogen Catalysts such as antimony halides, which are useful in fluorination reactions involving hydrogen fluoride, may be reduced during the reaction and require regeneration. Regenerative oxidation is usually carried out by introducing elemental halogen, preferably fluori... | 01/15/2008 |
| 7210301 | Use of 1,1,1,3,3-pentafluorobutane as a refrigerant in a turbocompressor cooling system The use of 1,1,1,3,3-pentafluorobutane (R365mfc) as refrigerant in turbocompressor cooling systems, which, due to their construction, can achieve high outputs with a small space and material requirement. Such systems used in high-performance commercial and industria... | 05/01/2007 |
| 7145046 | Production of fluorine compounds Inorganic and organic compounds containing fluorine can be produced, for example, from corresponding chlorine-containing compounds by chlorine/fluorine exchange using fluorinating agents. Monocyclic or bicyclic compounds containing at least two nitrogen atoms, at le... | 12/05/2006 |
| 7074975 | Catalytic synthesis of halogenated compounds with catalyst regeneration with elemental halogen Catalysts such as antimony halides, which are useful in fluorination reactions involving hydrogen fluoride, may be reduced during the reaction and require regeneration. Regenerative oxidation is usually carried out by introducing elemental halogen, preferably fluori... | 07/11/2006 |
| 7057079 | Method of synthesizing alkenone compounds A method of producing a halogen alkenone ether by attaching carboxylic acid halogenides or carboxylic acid anhydrides to a vinyl ether. According to the invention the method is carried out in the presence of an onium salt of a carbonic acid which can be regenerated.... | 06/06/2006 |
| 7037431 | Method for removing acid from an aprotic liquid Acids can be removed from aprotic organic liquids by bringing the liquids into contact with polyalkyleneimines that have been applied to a support. Polyethyleneimine that has been applied to amorphous silicon dioxide is particularly suitable for this method. The met... | 05/02/2006 |
| 7014831 | Purification of sulfuryl fluoride Sulfuryl fluoride, which is useful as a fumigant, may be contaminated with sulfur dioxide and possibly other impurities such as sulfuryl chloride, depending on the way it is produced. According to the invention, sulfur dioxide and, if applicable, sulfuryl chloride f... | 03/21/2006 |
| 6992213 | Method for removing trifluoroethanol from liquids Trifluoroethanol can be isolated from organic liquids that are contaminated by trifluoroethanol by bringing the contaminated liquid into contact with a molecular sieve having a pore size ranging between 0.5 and 1.0 nm, e.g., with molecular sieve 13X. This enables, f... | 01/31/2006 |
| 6921545 | Synergistic control of pests Sulfuryl fluoride and ovicidal gases have been found to exert a synergistic action on insect eggs, so it is possible to fumigate under sublethal conditions relative to the ovicide, and the dose of ovicidal gas can be reduced e.g. to sublethal concentrations. ... | 07/26/2005 |
| 6880746 | Fluorostannate-containing brazing or soldering fluxes and use thereof in brazing or soldering aluminum or aluminum alloys Fluxing agents comprising potassium fluorostannate and/or cesium fluorostannate which can be used for brazing or soldering components of aluminum or of an aluminum alloy, even by solderless brazing or soldering. Conventional fluxing agents or other fluorometallates,... | 04/19/2005 |
| 6861451 | Carboxylic acid fluorides as pesticides Carboxylic acid fluorides having a boiling point of preferably less than 100° C. are suitable for use as pesticides. Acetyl fluoride is highly suitable, and Chlorodifluoroacetyl fluoride and trifluoroacetyl fluoride are also very useful. Mixtures of carboxylic acid... | 03/01/2005 |
| 6814884 | Method of transferring heat using a working fluid containing 1,1,1,3,3-pentafluorobutane as refrigerant or heat transfer medium A method of using mixtures consisting essentially of 1,1,1,3,3-pentafluorobutane (R365mfc) and at least one further partially fluorinated hydrocarbon selected from the group consisting of 1,1,1,2-tetrafluoroethane (R134a), pentafluoroethane (R125), 1,1,1,3,3-pentafl... | 11/09/2004 |
| 6743409 | Alkali metal fluorozincate and method for producing it Novel methods for producing alkali metal fluorozincates, especially potassium fluorozincate. Products having defined particle size ranges are obtained depending on the sequence of introduction of the reactants alkali metal hydroxide, zinc oxide and hydrogen fluoride... | 06/01/2004 |
| 6733598 | Brazing flux for dry application A flux based on alkali fluoroaluminate is described which is highly suitable for dry application (“dry fluxing”). This is a flux which is free of fine-grained fraction, which is defined by a range of grain-size distribution. ... | 05/11/2004 |
| 6723874 | Method of producing acid fluorides from acid chlorides Acid fluorides, for example carboxylic acid fluorides and sulfuryl fluoride are produced by reacting the corresponding acid chlorides with hydrogen fluoride adducts of ammonium fluoride or amine hydrofluorides (which act as a catalyst or as a fluorination agent). Co... | 04/20/2004 |
| 6720465 | Preparation of highly pure fluorine compounds A process for preparing purified, saturated, partially fluorinated or perfluorinated hydrocarbon compounds from crude products which are contaminated with impurity compounds which absorb light at a wavelength of λ>200 nm by irradiating the crude product with UV rad... | 04/13/2004 |
| 6706090 | Method for recovering and/or separating sulfur oxyfluorides from gas mixtures A method for the recovery or separation of sulfur oxyfluorides from gas mixtures, in which the gas mixture passes through at least one adsorption stage or membrane stage containing or consisting of zeolites with a modulus >10. The sulfur oxyfluorides fixed to the ad... | 03/16/2004 |
| 6677085 | Electrolyte system for lithium batteries, the use thereof, and method for enhancing the safety of lithium batteries An electrolyte system for lithium batteries with enhanced safety. The system contains at least one conductive salt containing lithium and at least one electrolyte liquid. The electrolyte liquid contains an effective amount of a partially fluorinated compo... | 01/13/2004 |
| 6645451 | Method of preparing inorganic pentafluorides The preparation of phosphorus pentafluoride and arsenic pentafluoride by reacting corresponding trihalides with elemental chlorine, bromine or iodine and also with hydrogen fluoride.... | 11/11/2003 |
| 6583313 | Two phase preparation of carboxylic acid esters The methyl and ethyl esters of trifluoroacetic acid or chlorodifluoroacetic acid can be prepared in a technically simple manner from the corresponding acid chlorides and methanol or ethanol, respectively, in the presence of an "onium" salt of the acid as ... | 06/24/2003 |
| 6525213 | Process for preparing esters An improved process for preparing carboxylic acid esters from acid chlorides, acid bromides or acids and alcohols provides for performing the esterification in the presence of the adduct (onium salt) of the corresponding carboxylic acid and 1,5-diazabicyc... | 02/25/2003 |
| 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 |
| 6500994 | Purification of 1,1,1,3,3-pentafluorobutane A process for purification of 1,1,1,3,3-pentafluorobutane (HFC-365mfc) containing a decreased amount of hydrogen chloride, hydrogen fluoride and/or unsaturated impurities. To this end crude 1,1,1,3,3-pentafluorobutane is treated in the liquid phase with a... | 12/31/2002 |
| 6489510 | Production of carboxylic acid fluorides A method for producing carboxylic acid fluorides of the formula RCFXC(O)F, where X represents fluorine or chlorine, in good yields and with good selectivity for the carboxylic acid fluorides by reacting compounds of the formula RCFXCHFCl with oxygen by ph... | 12/03/2002 |
| 6489064 | Electrolyte system for lithium batteries, the use thereof, and method for enhancing the safety of lithium batteries Electrolyte systems for lithium batteries with enhanced safety containing at least one lithium-containing conductive salt and at least one electrolyte liquid, in which the electrolyte liquid includes an effective amount of at least one partially fluorinat... | 12/03/2002 |
| 6471934 | Disproportionation of sulfuryl chloride fluoride A method of preparing sulfuryl fluoride by disproportionation of sulfuryl chloride fluoride in the gas phase on activated carbon.... | 10/29/2002 |
| 6454837 | Separation of gases containing SF6 Gas mixtures of SF6 and N2, which have been used, for example, as an insulating filler gas for underground cables, for insulating-gas window panes or as a filler gas for car tires and SF6 /air mixtures which have been used... | 09/24/2002 |
| 6432221 | Fluxing agents Components made of aluminum and aluminum alloys can be brazed at temperatures of up to 600° C. using a fluxing agent composed of alkali fluorozincate or alkali fluoride/zinc fluoride mixtures. Other fluxing agents, for example those composed of potassium... | 08/13/2002 |
| 6380275 | Production of polyurethane foams and of foamed thermoplastic synthetic resins A method for the production of polyurethane foams and of thermoplastic foams is described. As blowing agent, a composition is used, which contains or consists of pentafluorobutane, preferably pentafluorobutane (HFC-365mfc) and at least one further blowing... | 04/30/2002 |
| 6350424 | Low-melting potassium fluoroaluminate The production of a potassium fluoroaluminate having a low melting point, which can be used as a flux when soldering aluminum. The potassium fluoroaluminate is prepared in an aqueous medium from aluminum hydroxide, hydrogen fluoride and potassium hydroxid... | 02/26/2002 |
| 6303667 | Foaming agents containing liquid carbon dioxide A blowing agent composition includes a blowing agent consisting of liquified carbon dioxide and 1,1-difluoroethane, or a mixture consisting of liquid carbon dioxide and at least one other liquid or pressure-liquified component selected from the group cons... | 10/16/2001 |
| 6264096 | Flux suitable for soldering light metals such as aluminum A flux which contains irreversibly dehydrated K2 AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and ... | 07/24/2001 |
| 6252105 | Synthesis of low-fluoride organic compounds Organic compounds, e.g. fluorinated organic compounds such as fluorinated carboxylic acids or fluorinated carboxylic acid chlorides, may contain small amounts of carboxylic acid fluorides, hydrogen fluoride or hydrolyzable fluoride, which during the prepa... | 06/26/2001 |
| 6238642 | Process of preparing sulfuryl fluoride Sulfuryl fluoride is prepared selectively and in a high yield from sulfur dioxide and elemental fluorine in the presence of an alkali fluoride and hydrogen fluoride. The preferred alkali fluoride is potassium fluoride.... | 05/29/2001 |
| 6221129 | Process for preparing flux suitable for soldering light metals such as aluminum A flux which contains irreversibly dehydrated K2 AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and ... | 04/24/2001 |
| 6207125 | Recycling of flux material Flux residues from aluminium soldering fluxes composed of alkali metal metallates, especially fluoroaluminates of the alkali metals, in particular potassium and cesium, can be recycled by adding them to the reaction mixture used for the production of hydr... | 03/27/2001 |
| 6143269 | Purification of sulfuryl fluoride Sulfuryl fluoride (SO2 F2) frequently contains chlorine, sulfur dioxide and other acidic impurities owing to its production. Effective purification is possible if the sulfuryl fluoride is contacted with hydrogen peroxide or a precurs... | 11/07/2000 |
| 6105631 | Preparation of homogeneous gas mixtures with SF6 Homogeneous compressed gas mixtures with SF6 and a gas with a density at least 4 grams per liter lower can be prepared by using a mixing station with at least the following elements: a gas premixer in which the separate gases are brought togeth... | 08/22/2000 |
| 6105850 | Aluminum brazing method which avoids waste water A method of avoiding generation of waste water while brazing components made of aluminium or an aluminium alloy using a flux, especially a flux composed of an aqueous suspension of potassium fluoroaluminate. Since used suspension is replaced with fresh su... | 08/22/2000 |
