186 results about "Difluoride" patented technology

A solid electrolyte membrane for solid polymer fuel cells, or the like is provided that is chemically stable in a strong acid atmosphere, and has low methanol cross-over as well as high proton conductivity. The solid electrolyte membrane is manufactured, using an electrolyte composition comprising a sulfonic acid group-containing polymer having a specific triazine structure. This polymer can be synthesized, for example, from a sulfonic acid group-containing dihydroxy compound having a triazine structure, and a difluoride.

The present invention discloses a preparation method of the difluoride lithium oxalate borate. The method is characterized in that the compounds containing the fluorin, boron, lithium and oxalate react at a certain temperature and under a certain pressure to produce the crude material of the difluoride lithium oxalate borate; then the organic solvent is used for extracting and purifying; finally, the recrystallization and vacuum drying are done to get the battery-level lithium fluoride oxalate borate. The advantage is that the preparation method of the difluoride lithium oxalate borate can improve the high-temperature and low-temperature performance, the cycle performance, power characteristics and other comprehensive performances of the lithium-ion battery.

The polymer lithium ion cell includes anode plate, cathode plate and electrolyte. At least one of the anode plate and the cathode plate has polymer substrate material film comprising polymer A and polymer B, the polymer A is poly(methyl methacrylate-acrylonitrile-lithium methacrylate) and the polymer B is poly(vinylidene difluoride) or poly(vinylidene difluoride-hexafluoropropylene). During the preparation of the cell, the polymer substrate material is painted directly onto anode plate and/or the cathode plate to form cell diaphragm, and electrolyte liquid is filled to form polymer electrolyte. The polymer lithium ion cell has simple preparation process and no need of addition diaphragm.

This invention relates to non-radioactive markers that facilitate the detection and analysis of nascent proteins translated within cellular or cell-free translation systems. Nascent proteins containing these markers can be rapidly and efficiently detected, isolated and analyzed without the handling and disposal problems associated with radioactive reagents. Preferred markers are dipyrrometheneboron difluoride (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) dyes.

This invention relates to non-radioactive markers that facilitate the detection and analysis of nascent proteins translated within cellular or cell-free translation systems. Nascent proteins containing these markers can be rapidly and efficiently detected, isolated and analyzed without the handling and disposal problems associated with radioactive reagents. Preferred markers are dipyrrometheneboron difluoride (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) dyes.

The invention is concerned with ultra filtration prepare method of poly (vinylidene fluoride) flat with grads structure. Dissolve poly (vinylidene fluoride) and additive into Phosphate solvent at high temperature, scrape and spread the liquid of film making after filtration and removing dunk on non-woven fabrics and set in air for some time, at last immerge the non-woven fabrics into the liquid with some compose to solidification, after the two gel processes of low temperature and high temperature to get the ultra filtration film with grads structure. This kind of ultra filtration film is fit for ultra filtration separation field and to prepare all kinds of multiplex films as supporting film. The part of poly (vinylidene fluoride) ultra filtration film closes to the surface of film is partly crystal layer, the under layer is non- crystal layer with meshwork type hole structure. The shrink ratio of the film is low with ascendant mechanics capability and this invention has simple operation and cheap stuff.

The invention discloses novel fluoride phenyl silicone oil and a preparation method thereof, pertaining to the technical field of chemical synthesis and special-typed high molecular material. The silicone oil takes 3, 5-difluoride substituent-1-halogeno benzene and methyl-trimethoxy silicane as raw materials and prepares fluoride organoxilicon monomer 3, 5-difluoride substituent phenyl-methyl-dimethoxy-silicane monomer through grignard reaction and substitution reaction. Hydrolysis and equilibrium polymerization are imposed on the fluoride organoxilicon monomer synthesized and dimethyl-dimethoxy silicane together to prepare 3, 5-di (trifluoromethyl) phenyl silicone oil. The novel fluoride phenyl silicone oil product has good heat resistance, is supposed to be applied as heat conducting oil, hydraulic oil, surface treatment materials and the like, and has advantages of easy access to raw materials, easy realization of preparation technology and facilitation for promotion and application.

The invention discloses a method for preparing o-trifluoromethyl benzaldehyde. The method for preparing the o-trifluoromethyl benzaldehyde, disclosed by the invention, comprises the following steps: in the presence of a catalyst, carrying out hydrolysis reaction on a mixture of o-trifluoromethyl methylbenzene bichloride, o-trifluoromethyl chloro-fluoro-methylbenzene and o-trifluoromethyl methylbenzene difluoride and water at the temperature of 80-150 DEG C to obtain, wherein the mass of the catalyst accounts for 0.01-10% of the mass of the mixture. The method disclosed by the invention is cheap and easily available in raw materials, low in cost, little in wastewater, low in energy consumption and simple in operation and can be suitable for industrial production. The structural formula of the o-trifluoromethyl benzaldehyde is shown in the specification.

The invention relates to a preparation method of lithium phosphate difluoride, in particular to a method for producing industrially and economically-superior lithium phosphate difluoride for producingnonaqueous electrolyte batteries. The preparation method of the lithium phosphate difluoride at least comprises the following steps: (1) performing a reaction on lithium halide, phosphorus pentahalide and lithium hexafluorophosphate to obtain tetra-halogen lithium phosphate difluoride; (2) making tetra-halogen lithium phosphate difluoride react with a substance containing active oxygen to obtainlithium phosphate difluoride.

The invention provides a preparation method of high purity trifluridine. The method is as below: reacting a raw material of a compound 2 with HMDS under the action of trimethylchlorosilane to obtain a compound 3; subjecting the compound 3 and a compound 4 to condensation in the presence of a catalyst copper difluoride; conducting ethanol recrystallization to obtain a compound 5; and finally conducting deprotection on the compound 5 under the effect of sodium methylate; and recrystallizing by a mixed solvent of ethanol and acetone (1:1) to obtain the high purity object compound 1. The method has the advantages of high purity of the product, simpleness, easy purification and less industrial pollution.

Silicon oxide etching solutions containing the product of at least one bifluoride source compound dissolved in a solvent consisting of at least one carboxylic acid, and further comprising from about 0.5 to about 3 percent by solution weight of hydrofluoric acid and from about 1 to about 5 percent by solution weight of water, wherein the total concentration of bifluoride source compound is between about 1.25 and about 5.0 moles per kilogram of solvent. Methods for selectively removing silicon oxides and metal silicates from metal surfaces are also disclosed.

The invention provides electrolyte for promoting film formation of a graphite cathode and a battery using the electrolyte. The electrolyte comprises an electrolyte lithium salt, difluoride ethylene carbonate (DFEC), propylene carbonate (PC) and a non-aqueous organic solvent, wherein a chemical structure of the DFEC is as shown in the formula (I); the formula (I) is as shown in the specification; a lithium secondary battery comprises a positive plate, a negative plate, a diaphragm and the electrolyte for promoting film formation of the graphite cathode provided by the invention. By the DFEC, a passivation film which is stable enough can be formed on the surface of a graphite material; when the PC is utilized by the electrolyte as a high dielectric constant solvent component, graphite powder is not stripped due to the fact that propylene carbonate molecules are embedded into a layered structure of the graphite material, and the lithium ion battery does not lose efficacy in the charging and discharging cycle processes of the lithium ion battery; and the service life of the lithium battery is prolonged.

The invention discloses a multiple-synergism type lockage removal agent, which comprises components with parts by weight: water 80-120 parts, cleaning dissolving agents 5-10 parts, dissolution agents 15-20 parts, ammonium hydrofen difluoride 0.5-1 part, ninol 0.4-0.6 part, dodecyl trimethyl ammonium chloride 2.5-3 parts, ammonium persulfate 0.1-0.3 part, (SA-3) inhibiters 2.5-3 parts and ferric ion stabilizers for acidification. The multiple-synergism type lockage removal agent has the advantages of wide range of application, excellent lockage removal effect and high lockage removal successful rate and the like.

An insulating conductive material for heating electric cable and its use are disclosed. The insulating conductive material consists of ceramic material and polymer materials in proportion of 1:1-9, lubricant 0.1-2wt%, antioxidant 0.1-2wt% and carbon material 5-20wt%. The ceramic material is chosen from any kind of aluminum nitride and boron nitride; the polymer material is chosen from any kind of polypropylene, polystyrene, polyphenyl, polyvinyl chloride, polythene, vinylidene difluoride and polyperfluoropropene. It has excellent machining performance and better heat conductivity.

Silicon oxide etching solutions consisting essentially of the product of at least one bifluoride source compound dissolved in a solvent consisting of about 90% to 100% by weight of at least one carboxylic acid and 0 to about 10% by weight water, wherein the total concentration of bifluoride source compound is between about 1.25 and about 5.0 moles per kilogram of solvent. Methods for selectively removing silicon oxides and metal silicates from metal surfaces are also disclosed.

The present invention discloses a method for preparing hydrogen fluoride by using a phosphorus fertilizer by-product fluosilicic acid. The method comprises that: fluosilicic acid is subjected to ammonification to produce a fluorinated ammonia solution; ammonification conditions of every step are controlled to adjust the morphology and the specific surface area of white carbon black aggregate, such that the produced white carbon black filter cake has characteristics of easy filtration, easy washing and high activity structure; and the filtered filter cake is washed a plurality of times with a dilute fluorinated ammonia solution and clear water, the entrained fluorine mother liquor is recovered, and the fluorinated ammonia solution is adopted to further produce hydrofluoric acid, such that fluorine and silicon in the fluosilicic acid are completely converted into the fluorine product and the silicon product so as to be utilized. According to the present invention, fluosilicic acid, sulfuric acid, liquid ammonia and other raw materials are processed into the useful products so as to protect fluorite and the fluorine resources, substantially increase the raw material added value, and provide good economic benefits; the intermediate product ammonium hydrogen difluoride can be adopted as the product so as to be directly sold; and the fluorinated ammonia product can be produced if the investment is slightly increased, such that the product variety can be conveniently adjusted so as to adapt to market demands.

The invention provides a surface treatment method for an aluminum board. The surface treatment method comprises the following steps: (1) cleaning the aluminum board surface to remove impurities and grease on the aluminum board surface; (2) soaking the aluminum board in alkali liquor for 2-4 minutes, wherein the temperature of the alkali liquor is 50-80 DEG C; (3) soaking the aluminum board in a weak-acid solution for 3-5 minutes at 30-45 DEG C, wherein the weak-acid solution comprises the following raw materials in parts by weight: 50-60 parts of phosphoric acid, 20-30 parts of butanoic anhydride, 3-5 parts of ammonium hydrofen difluoride, 1-3 parts of boric acid and 2-3 parts of diammonium hydrogen phosphate; (4) performing water cleaning on the aluminum board; (5) drying the aluminum board. The surface treatment method disclosed by the invention has the beneficial effect that chemical oxidization is adopted, power is not used and the water is circulated, so that the energy consumption is greatly lowered; and the occurrence of safety accidents caused by strong acid and strong base is avoided.

A porous electrode for electrochemical cells, methods of making the same and its application are described. The porous electrode is comprised of a porous conductive layer and an insulating layer, whereas the pores inside the conductive layer function as mini-containers for the active metal for rechargeable batteries, and the insulating material covers the top conductive surface of the conductive layer and blocks the sites where active metal dendrite would otherwise preferentially grow. An example of such electrodes is a porous copper foil with top surface coated with polyvinylene difluoride (PVDF). Electrochemical cells containing the invented electrode, such as rechargeable lithium batteries, sodium batteries and aluminum batteries, have good cycle life and safety performance.

In favor of adhesion a radiation image phosphor or scintillator panel comprises as an arrangement of layers, in consecutive order, an anodized aluminum support, a precoat layer and a phosphor or scintillator layer comprising needle-shaped phosphor or scintillator crystals, wherein said precoat layer has a thickness in the range from 4 μm to 15 μm when consisting of an organic polymer selected from the group consisting of cellyte, poly-acrylate, poly-methyl-methacrylate, poly-methylacrylate, polystyrene, polystyrene-acrylonitrile, polyurethane, hexafunctional polyacrylate, poly-vinylidene-difluoride, epoxy functionalized polymers or wherein said precoat layer has a thickness in the range from 1 μm to less than 5 μm when consisting of an organo-silane based polymer.