摘要:
Fire extinguishing compositions and methods for extinguishing, controlling, or preventing fires are described wherein the extinguishing agent is a fluorinated ketone having up to two hydrogen atoms, alone, or in admixture with a co-extinguishing agent selected from hydrofluorocarbons, hydrochlorofluorocarbons, perfluorocarbons, perfluoropolyethers, hydrofluoroethers, hydrofluoropolyethers, chlorofluorocarbons, bromofluorocarbons, bromochlorofluorocarbons, iodofluorocarbons, hydrobromofluorocarbons, and mixtures thereof.
摘要:
Methods of using reactive gases containing a perfluoroketone having 4 to 7 carbon atoms for removing unwanted deposits that build up in a vapor reactor, for etching dielectric and metallic materials in a vapor reactor, and for doping a material in a vapor reactor are described. The perfluoroketones perform as well as or better than the standard perfluorocarbons used in the semiconductor industry but have minimal impact on global warming.
摘要:
A apparatus and a method for heat transfer is provided. The apparatus include a device and a mechanism for transferring heat to or from the device that includes a heat transfer fluid comprising a fluorinated oxirane. The fluorinated oxirane can contain substantially no hydrogen atoms bonded to carbon atoms and can have from about 4 to about 18 carbon atoms.
摘要:
Fire extinguishing compositions and methods for extinguishing, controlling, or preventing fires are described wherein the extinguishing agent includes a fluorinated oxirane alone, or in admixture with a co-extinguishing agent selected from hydrofluorocarbons, hydrochlorofluorocarbons, perfluorocarbons, perfluoropolyethers, hydrofluoroethers, hydrofluoropolyethers, chlorofluorocarbons, bromofluorocarbons, bromochlorofluorocarbons, iodofluorocarbons, hydrobromofluorocarbons, fluorinated ketones, hydrobromocarbons, fluorinated olefins, hydrofluoroolefins, fluorinated sulfones, fluorinated vinylethers, and mixtures thereof. Also described are methods of preventing or extinguishing fires by introducing these compositions into an air-containing enclosed area and maintaining the composition in an amount sufficient to suppress combustion of combustible material in that enclosed area.
摘要:
An lubricant composition comprising a C4 to C15 fluorooxirane fluid having a boiling point ≧20° C., and a lubricant soluble or dispersible therein, is provided.
摘要:
A lubricant composition comprising a perfluoropolyether lubricant and fluorinated ketone solvent is described. The lubricant composition can be applied as a coating to a substrate such as magnetic media. After the coating dries, a thin uniform lubricant film covers the substrate surface. The fluorinated ketone solvent can solubilize a wide range of perfluoropolyether compounds but not potential contaminants such as water and hydrocarbons. Additionally, the solvent has low potential to adversely affect global warming.
摘要:
A gaseous dielectric comprising a perfluoroketone of the formula Rf1—CO—Rf2, wherein each of Rf1 and Rf2 are perfluoroaliphatic groups, and use thereof in electrical devices, is described.
摘要:
A process for preparing fluorochemical compounds, e.g., perfluoroalkanes, perfluoroethers, and perfluoroalkyl tertiary amines, comprises(a) forming a mixture comprising at least one fluorinatable, non-functional organic starting compound, e.g., propane, and at least one other compound which is present in an amount sufficient to enable the formation of a fluorochemical phase and which is selected from the group consisting of(i) perfluorochemical compounds, e.g., perfluorohexane, which boil at a higher temperature than either the fluorinatable, non-functional organic starting compound or the fluorochemical compound resulting from the subsequent fluorination of the fluorinatable, non-functional organic starting compound; and(ii) precursor compounds, e.g., hexane, which can be fluorinated in situ to produce such perfluorochemical compounds; and(b) subjecting the mixture to electrochemical fluorination in the presence of anhydrous hydrogen fluoride.
摘要:
The instant invention relates to novel liquid membrane formulations, i.e., emulsions, which comprise an aqueous interior phase and a water-immiscible exterior phase; said water-immiscible exterior phase comprising an ethylene vinyl acetate copolymer and a solvent for this polymer. These compositions may additionally contain a water insoluble surfactant to stabilize the emulsions. In the most preferred embodiment, the aqueous interior phase comprises a strong acid, for example from about 1 to 10 percent by weight sulfuric acid. These emulsions are useful in liquid membrane processes for the separation of dissolved components from aqueous solution. Emulsions of the instant invention are characterized as showing very low swelling when contacted with aqueous solutions, especially at higher temperatures and thus are especially effective for use in the treatment of sour water feed streams by the liquid membrane technique.