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Solvay Fluor und Derivate GmbH Patents
Assignee:
Solvay Fluor und Derivate GmbH
Address:
Hannover, DE
No. of patents:
74
Patents:


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Patent Number Title Of Patent Date Issued
7401724 Brazing flux for dry application July 22, 2008
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.
7319175 Catalyst synthesis of halogenated compounds with catalyst regeneration with elemental halogen January 15, 2008
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 fluorine or chlorine, into
7210301 Use of 1,1,1,3,3-pentafluorobutane as a refrigerant in a turbocompressor cooling system May 1, 2007
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 industrial refrigeration un
7145046 Production of fluorine compounds December 5, 2006
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 least one of which i
7074975 Catalytic synthesis of halogenated compounds with catalyst regeneration with elemental halogen July 11, 2006
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 fluorine or chlorine, into
7057079 Method of synthesizing alkenone compounds June 6, 2006
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. The resulting pro
7037431 Method for removing acid from an aprotic liquid May 2, 2006
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 method can be used, for
6992213 Method for removing trifluoroethanol from liquids January 31, 2006
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, for example, triflu
6921545 Synergistic control of pests July 26, 2005
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.
6880746 Fluorostannate-containing brazing or soldering fluxes and use thereof in brazing or soldering al April 19, 2005
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, such as alkali me
6861451 Carboxylic acid fluorides as pesticides March 1, 2005
Carboxylic acid fluorides having a boiling point of preferably less than 100.degree. 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 fluoride pe
6814884 Method of transferring heat using a working fluid containing 1,1,1,3,3-pentafluorobutane as refr November 9, 2004
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-pentafluoropropane (R245f
6733598 Brazing flux for dry application May 11, 2004
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.
6723874 Method of producing acid fluorides from acid chlorides April 20, 2004
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). Consumed HF adducts may
6720465 Preparation of highly pure fluorine compounds April 13, 2004
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 .lambda.>200 nm by irradiating the crude product with UV radiation of a
6706090 Method for recovering and/or separating sulfur oxyfluorides from gas mixtures March 16, 2004
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 adsorbent may be made
6677085 Electrolyte system for lithium batteries, the use thereof, and method for enhancing the safety o January 13, 2004
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 compound derived from a diol corre
6645451 Method of preparing inorganic pentafluorides November 11, 2003
The preparation of phosphorus pentafluoride and arsenic pentafluoride by reacting corresponding trihalides with elemental chlorine, bromine or iodine and also with hydrogen fluoride.
6583313 Two phase preparation of carboxylic acid esters June 24, 2003
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 a catalyst. The alcohol is used i
6525213 Process for preparing esters February 25, 2003
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-diazabicyclo[4.3.0]-non-2-ene or 1,8-di
6521199 Regeneration of onium fluoride-HF adducts February 18, 2003
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.
6500994 Purification of 1,1,1,3,3-pentafluorobutane December 31, 2002
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 solid, inorganic sorption ag
6489510 Production of carboxylic acid fluorides December 3, 2002
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 photochemical oxidation in the gase
6489064 Electrolyte system for lithium batteries, the use thereof, and method for enhancing the safety o December 3, 2002
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 fluorinated amide of formula (I)in which R
6471934 Disproportionation of sulfuryl chloride fluoride October 29, 2002
A method of preparing sulfuryl fluoride by disproportionation of sulfuryl chloride fluoride in the gas phase on activated carbon.
6454837 Separation of gases containing SF6 September 24, 2002
Gas mixtures of SF.sub.6 and N.sub.2, 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 SF.sub.6 /air mixtures which have been used as a protective gas when casting magnesium can be
6432221 Fluxing agents August 13, 2002
Components made of aluminum and aluminum alloys can be brazed at temperatures of up to 600.degree. C. using a fluxing agent composed of alkali fluorozincate or alkali fluoride/zinc fluoride mixtures. Other fluxing agents, for example those composed of potassium fluoroaluminate can be
6380275 Production of polyurethane foams and of foamed thermoplastic synthetic resins April 30, 2002
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 agent selected from the grou
6350424 Low-melting potassium fluoroaluminate February 26, 2002
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 hydroxide in a molar ratio of aluminu
6264096 Flux suitable for soldering light metals such as aluminum July 24, 2001
A flux which contains irreversibly dehydrated K.sub.2 AlF.sub.5, 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 exhibiting outstanding flow of the solder.
6252105 Synthesis of low-fluoride organic compounds June 26, 2001
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 preparation of derivatives of the
6238642 Process of preparing sulfuryl fluoride May 29, 2001
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.
6221129 Process for preparing flux suitable for soldering light metals such as aluminum April 24, 2001
A flux which contains irreversibly dehydrated K.sub.2 AlF.sub.5, 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 exhibiting outstanding flow of the solder.
6207125 Recycling of flux material March 27, 2001
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 hydrogen fluoride from fluorspar
6143269 Purification of sulfuryl fluoride November 7, 2000
Sulfuryl fluoride (SO.sub.2 F.sub.2) 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 precursor thereof, preferably in an aqueous solu
6105850 Aluminum brazing method which avoids waste water August 22, 2000
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 suspension after a given period of
6105631 Preparation of homogeneous gas mixtures with SF.sub.6 August 22, 2000
Homogeneous compressed gas mixtures with SF.sub.6 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 together; a static mixer and/or a buffer tank
6080799 Mixtures containing 1,1,1,3,3 pentafluorobutane June 27, 2000
Mixtures containing 50 to 99% by weight of 1,1,1,3,3-pentafluorobutane and 1 to 50% by weight of at least one fluorohydrocarbon selected from 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3,3-hexafluoropropane, and 1,1,1,2,3,3,3-heptafluoropropane. The mixtures are
6054064 Refrigerant of 1,1-difluoroethylene April 25, 2000
Refrigerants comprising 1,1-difluoroethylene and one or more hydrofluoroalkanes, in particular difluoromethane (R-32), trifluoromethane (R-23), 1,1-difluoroethane (R-152a), 1,1,1-trifluoroethane (R-143a), 1,1,1,2-tetrafluoroethane (R-134a) and/or pentafluoroethane (R-125).
6019856 Solderless aluminum brazing February 1, 2000
A method for aluminum brazing, in which the addition of a solder is no longer necessary. For this purpose a flux is used which contains 6 to 50 wt-% of potassium fluorosilicate and 50 to 94 wt-% of potassium fluoroaluminate. The flux can be used, for example, in the form of an aqueou
5985233 Low-melting potassium fluoroaluminate November 16, 1999
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 hydroxide in a molar ratio of aluminu
5980650 Flux suitable for soldering light metals such as aluminum November 9, 1999
A flux which contains irreversibly dehydrated K.sub.2 AlF.sub.5, 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 exhibiting outstanding flow of the solder.
5968288 Method for the preparation of a soldering flux October 19, 1999
A method for the preparation of potassium salts of complex aluminum fluorides which can be used in particular as a flux in particular for soldering lightweight metallic materials. In the method a potassium compound is added to aqueous fluoroaluminic acid, and potassium cryolite or a
5919341 Difluorochloracetyl, dichloracetyl and trichloracetyl chloride preparation July 6, 1999
A process for preparing chlorodifluoroacetyl chloride from 1,1-difluoro-2,2-dichloroethylene and dichloroacetyl chloride from trichloroethylene or 1,1,2,2-tetrachloroethane, in which the starting compounds are continuously reacted in the gaseous phase with oxygen to obtain a photoche
5894075 Catalytic mixtures composed of titanium and tin and uses thereof April 13, 1999
The addition of hydrogen fluoride to unsaturated C--C groups and the chlorine-fluorine exchange on perhalogenated carbon atoms can be advantageously catalyzed by a catalyst mixture which comprises at least partially fluorinated titanium halide in combination with tin (IV) halide.
5888688 Difluoromethoxy-2, 2, 2-trifluoroethane compositions and methods of use March 30, 1999
The present invention relates to new uses of difluoromethoxy-2,2,2-trifluoroethane (E245) or of compositions which contain difluoromethoxy-2,2,2-trifluoroethane together with a further solvent (cosolvent). The invention furthermore relates to new compositions of E245 as a mixture wit
5866093 Method of preparing LiPF.sub.6 February 2, 1999
A method for preparing lithium hexafluorophosphate, which is useful as an electrolyte in primary and secondary cells, involves combining and cooling phosphorus pentachloride and lithium fluoride, and then adding hydrogen fluoride. Using this method, which is simple to perform, a good yie
5759707 Flux-coated metal components June 2, 1998
Metal structures, e.g. coolers or heat exchangers, can be produced by placing together metal components coated with solder, dipping them into a slurry of a flux, and soldering them by heating. Alternatively, components coated with solder can also be coated with flux, then placed together
5679613 Chlorofluoro(hydro)carbon conversion process October 21, 1997
A process for preparing R113a from Rl13, and R123 from R123a or R123b by rearrangement over AlCl.sub.3, in which when the reaction mixture is heated sudden start-up of the reaction, which often causes large amounts of heat to be released and the reaction to run away, is prevented by usin
5674825 Difluoromethoxy-2,2,2-trifluoroethane compositions and methods of use October 7, 1997
The present invention relates to new uses of difluoromethoxy-2,2,2-trifluoroethane (E245) or of compositions which contain difluoromethoxy-2,2,2-trifluoroethane together with a further solvent (cosolvent). The invention furthermore relates to new compositions of E245 as a mixture wit
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