120 results about "Hydrofluoroether" patented technology

The invention discloses a lithium ion battery electrolyte, a preparation method and application. The lithium ion battery electrolyte comprises a lithium salt and an organic solvent, wherein the lithium salt comprises a combination of at least two of lithium hexafluorophosphate, lithium difluoro bis (oxalato) phosphate, lithium bis (fluorosulfonyl) imide and lithium bis (oxalato) borate, and the organic solvent comprises 30 wt%-50 wt% of hydrofluoroether, 10 wt%-30 wt% of acetate and 20 wt%-60 wt% of carbonate. The lithium ion battery electrolyte provided by the invention can keep the diaphragm structure complete, realizes filling of pores with lithium salt, and reduces the permeability of the diaphragm, thereby controlling possible shrinkage of the diaphragm in a temperature change process under a low-temperature or high-temperature condition; the crosstalk problem caused by gas penetration between the positive electrode and the negative electrode is inhibited, and the battery prepared by utilizing the lithium ion battery electrolyte provided by the invention has good cycle performance and rate capability under a low-temperature condition and has relatively high safety under a high-temperature condition.

The invention discloses a method for resource utilization of fluorine-containing waste gas in hexafluoropropylene oxide production and co-production of hydrofluoroether, which comprises the following steps of: firstly, reacting the fluorine-containing waste gas in hexafluoropropylene oxide production under the action of a fluorine ion catalytic system to generate a perfluorinated intermediate product; then, the perfluorinated intermediate product reacts with an alkylating reagent under the action of a fluorinating reagent to produce a hydrofluoroether product. Hydrofluoroether products with different structures are obtained by utilizing the characteristics of nucleophilic addition reaction of a by-product acyl fluoride and hexafluoropropylene in the production of hexafluoropropylene oxide and utilizing the characteristics of the addition product for preparing hydrofluoroether by using the same alkylation process; the hydrofluoroether products are widely applied to the fields of semiconductor temperature control fluid, data center immersion heat exchange fluid, electrified cleaning agents and inert diluents of base stations or weak current equipment and the like, and have high added value.

The invention belongs to the technical field of fluorine-containing fine chemical synthesis, and particularly relates to an oxa-hydrofluoroether compound and a synthesis method and application thereof. The invention relates to an oxa-hydrofluoroether compound, the structure of the oxa-hydrofluoroether compound is shown as a formula (1): # imgabs0 #, in which Rf is F or CF3; r is methyl or ethyl; n is an integer from 1 to 3; according to the oxa hydrofluoroether compound disclosed by the invention, oxygen atoms are embedded into a fluorocarbon chain structure, so that fluorine-containing chain segments of hydrofluoroether are more diversified, and the structure is not limited by a perfluorocarbon chain structure any more; according to the oxa-hydrofluoroether compound, oxygen atoms play a role in reducing surface tension, and the more the oxygen atoms are, the lower the surface tension is; compared with other hydrofluoroether solvents, the hydrofluoroether solvent has higher permeability and better cleaning effect; according to the oxa-hydrofluoroether compound, on one hand, oxygen atoms are embedded into a fluorocarbon chain structure, and on the other hand, the fluorocarbon chain contains branched chains, so that the oxa-hydrofluoroether compound is easy to degrade, and the environmental friendliness is improved.

The invention provides a glass cleaning agent as well as a preparation method, application and a use method thereof, and relates to the field of cleaning agents. The glass cleaning agent is prepared from the following components in percentage by mass: 0.025 percent to 0.1 percent of a chelating agent, 0.5 percent to 2 percent of an efficient cleaning agent, 0.05 percent to 0.2 percent of an alkaline cleaning agent, 2.5 percent to 10 percent of isopropyl alcohol, 2.5 percent to 10 percent of acetone, 0.05 percent to 0.2 percent of a phosphorus flame retardant and 77.5 percent to 94.375 percent of deionized water, the chelating agent comprises citric acid; the efficient cleaning agent is prepared from FC-3060 hydrofluoroether; the alkaline cleaning agent comprises sodium carbonate. The components of the glass cleaning agent are all selected from environment-friendly materials, the influence on the environment is small, harmful smoke or pungent smell is not generated in the using process, and the health of operators and the safety of the working environment are guaranteed.

The invention provides a supercritical lithium metal battery electrolyte with electric field adaptability and application, and belongs to the technical field of lithium metal batteries. Comprising a lithium salt, a main solvent and a diluent, has the characteristic of adaptively stabilizing a lithium metal negative electrode under the action of an electric field, and is a supercritical state electrolyte obtained by dissolving the lithium salt in the main solvent to form a solution with the concentration being greater than or equal to 5 mol / L and diluting the solution with the diluent; the main solvent is at least one of chain ester, chain ether and siloxane, the diluent is hydrofluoroether, and the volume ratio of the main solvent to the diluent is 1: (0.5-20). The lithium metal negative electrode shows stable self-adaptive capacity under the action of an electric field, and formation of lithium dendrites is inhibited by promoting decomposition of anions at the negative electrode to form SEI rich in inorganic components, so that long-time stable circulation of a high-voltage lithium metal battery is realized.

The invention relates to a sodium ion battery and a phosphate flame-retardant electrolyte thereof. The electrolyte solution includes: a solvent including trimethyl phosphate (TMP) and hydrofluoroether; a sodium salt; and an additive containing sodium tetrakis (3, 5-bis (trifluoromethyl) phenyl) borate. The electrolyte is low in cost, high in safety, good in interface compatibility and excellent in electrochemical performance.

The invention discloses a flame-retardant electrolyte, a preparation method and application in a graphite cathode, the electrolyte comprises a lithium salt, an organic solvent and a film-forming additive, the organic solvent is a mixed solvent comprising fluorinated carboxylic ester and hydrofluoroether, the concentration of the lithium salt in the organic solvent is 2-6 mol / L, and the film-forming additive is lithium bis (oxalate) difluorophosphate. The electrolyte has the beneficial effects that the high-concentration lithium salt in the electrolyte not only ensures the ionic conductivity of the carboxylic ester-based electrolyte, but also forms a solvation structure rich in anions, so that the compatibility of the electrolyte and a graphite negative electrode is improved. The perfluoro solvent and the additive ensure that the SEI film is rich in inorganic components such as LiF, LixPOyFz and the like, and particularly the SEI film rich in LiF effectively improves the compatibility of the EDFA carboxylate-based electrolyte and a graphite negative electrode and the transmission property of interface Li < + >.

The invention belongs to the field of solid-state batteries, and particularly relates to a lithium metal battery, a high-voltage wide-temperature-range gel polymer electrolyte of the lithium metal battery, a preparation method of the high-voltage wide-temperature-range gel polymer electrolyte and application of the high-voltage wide-temperature-range gel polymer electrolyte. The high-voltage wide-temperature-range gel polymer electrolyte is prepared; the composite monomer comprises a monomer 1 and a monomer 2 in a weight ratio of (1-2): (1-2), the monomer 1 comprises a compound as shown in a formula 1 (1), and the monomer 2 comprises a compound as shown in a formula 2 (2); the basic electrolyte comprises a conductive lithium salt and an ester ether solvent, and the conductive lithium salt comprises LiPF6; the ester-ether solvent comprises an ester solvent, a fluorinated ester solvent and hydrofluoroether in a weight ratio of (4-5): (2-3): (2-3). The electrolyte disclosed by the invention can meet the application requirements of high pressure and wide temperature range, and the high-pressure, low-temperature and high-temperature cycling stability of the electrolyte is improved.

An object is to provide a method for producing a magnetic disk that employs a fluorine-based solvent which has a low global warming potential and in which solubility of a high-polarity perfluoropolyether compound is excellent. This object is achieved by a method for producing a magnetic disk, the method including the step of applying, to a magnetic disk substrate, a lubricant solution containing a lubricant and a hydrofluoroether having a 100-year global warming potential value of less than 1000 and having a structure represented by the following Formula (A):where: Ra represents F, CF2-Re, or CF3; Rb represents O-Rd or C(-Rf)3; Rc represents H, F, or CF3; Re and Rd each independently represent a hydrocarbon group which may be partially substituted by a fluorine atom and each have a main chain in which at least one carbon atom may be replaced by an oxygen atom; and Rfs each independently represent H, F, or a hydrocarbon group that may be partially substituted by a fluorine atom, and the hydrocarbon group that may be partially substituted by the fluorine atom has a main chain in which at least one carbon atom may be replaced by an oxygen atom.

According to the purification method for obtaining the high-purity hydrofluoroether, the hydrofluoride salt with the acidity weaker than that of hydrofluoric acid is adopted for removing unsaturated impurities from the crude hydrofluoroether product, corresponding hydrofluoroether instead of other impurities is generated, the yield of the hydrofluoroether is increased, and the purity of the hydrofluoroether obtained after treatment is 99.3% or above and can reach 99.9% to the maximum. The method is low in cost, mild in reaction condition, short in reaction time, simple to operate, green, environment-friendly, safe, reliable and low in equipment requirement, and does not need low-temperature, water-free, oxygen-free and other conditions.

The invention discloses a method for synthesizing heptafluoro-n-propyl ether by taking hexafluoropropylene oxide as a raw material. The method comprises the following steps: with hexafluoropropylene oxide as a raw material, carrying out a ring-opening reaction under the action of a supported metal catalyst to obtain perfluoropropionyl fluoride; and mixing the perfluoropropionyl fluoride with inorganic fluoride, and then adding an aprotic polar solvent and an alkylating reagent to carry out alkylation reaction, thereby obtaining the perfluoropropionyl fluoride. The active metal of the supported metal catalyst comprises at least one of Ni, Fe, Co and Cu; a carrier of the supported metal catalyst is modified lignocellulose biochar. The supported metal catalyst is adopted to synthesize the perfluoropropionyl fluoride intermediate product, the reaction efficiency is improved, the reaction conditions are milder, the yield and purity of the obtained intermediate product are high, and the heptafluoro-n-propyl ether product continuously synthesized by adopting the intermediate product is high in yield and good in quality. The method greatly reduces the production cost of hydrofluoroether, and is simple in process and suitable for industrial production.

The invention discloses a production system for resource utilization of fluorine-containing waste gas in production of hexafluoropropylene oxide and co-production of hydrofluoroether, which is used for resource utilization of fluorine-containing waste gas in production of hexafluoropropylene oxide and comprises an intermediate reaction system, a hydrofluoroether co-production system and a hydrofluoroether co-production system, the intermediate reaction system is used for reacting fluorine-containing waste gas in hexafluoropropylene oxide production under the action of a fluorine ion catalyst to generate a perfluorinated intermediate product; an alkylation reactor, in which the perfluorinated intermediate product reacts with an alkylation reagent under the action of a fluorination reagent to generate an alkylation product; the cleaning and drying system is used for cleaning and drying the alkylated product; the rectification system is used for rectifying the cleaned and dried alkylated product to obtain a hydrofluoroether product.

The application discloses application of high-thermal-stability hydrofluoroether, and the high-thermal-stability hydrofluoroether has a structural formula of HCF2CF2CF2CF2CH2OCF2CF2H, and is used as a coolant for a cooler of a temperature control device in a semiconductor product processing process, and has the advantages that the high-thermal-stability hydrofluoroether with the specific molecular structure is used as the coolant for the cooler of the temperature control device in the semiconductor product processing process, the substance is compatible with most materials in a wide temperature range, has good thermal stability, chemical inertia and non-corrosiveness, is non-toxic in the use process, has good environmental and safety characteristics, has an ODP value of 0 and a very low GWP value, and the substance has excellent dielectric properties, low viscosity and high resistivity, and is especially suitable for a heat transfer fluid in a semiconductor wafer etching process.

Provided is a method for effectively reducing the concentration of a hydrofluoroether-olefin (HFEO) contained in a mixture comprising a hydrofluoroether (HFE) and the HFEO. This method for reducing the concentration of an HFEO is one in which the HFE is a compound (A) represented by formula (1) and the HFEO is a compound (B) represented by formula (2), the method comprising reacting the compound (B) contained in the mixture with a compound (C) which is any of an alcohol, chlorine, and hydrogen.　(1): R2-O-R1-O-R3 (2): R2-O-R1-O-R4 In formulae (1) and (2), R1 is a C1-C4 alkylene group, R2 and R3 are each independently a C2-C4 fluoroalkyl group, and R4 is a C2-C4 fluoroalkenyl group.

The application belongs to the technical field of lithium batteries, and provides a locally high-concentration ionic liquid modified electrolyte, a preparation method and application thereof.The ionic liquid modified electrolyte provided by the application takes a stachydrine ionic liquid and a diluent hydrofluoroether and / or fluorophosphate as a main body, adds specific cosolvents and lithium salts, well dissolves the stachydrine ionic liquid and the diluent, and forms a homogeneous phase.Compared with a traditional carbonate electrolyte, the ionic liquid modified electrolyte has high conductivity, low viscosity, a wide electrochemical window, non-flammability and non-volatility, and high lithium ion transference number;further used for assembling lithium batteries, still can maintain good charge and discharge capacity after running at different rates, has good cycle stability and service life, lithium battery cycle number is greater than or equal to 80 cycles, and even can reach 220 cycles, average coulombic efficiency is greater than or equal to 96.5%, and even can reach 98.6%.

A process for making hydrofluoroethers, the process comprising: •A) providing a mixture comprising one more polar aprotic organic solvents having a boiling point measured at 1 atm (1.01 bar) of from 60° C. to 170° C. and one or more chemical compounds carrying at least one —OH group which is part of an alcohol or of a phenol group, and •B): reacting said one or more chemical compounds carrying at least one —OH group with one or more fluorinated olefin in the presence of a basic catalyst thus providing a reacted mixture comprising one or more hydrofluoroethers.

The application provides a fire-retardant immersion type cooling liquid for high-multiplicity lithium iron phosphate battery packs and a preparation method thereof, raw materials of the fire-retardant immersion type cooling liquid include, in percentage by weight, 85-95% fluorine compound base carrier, 5-15% phosphorus-nitrogen composite fire retardant; the fluorine compound base carrier contains low-boiling-point hydrofluoroether, branched-chain perfluoropolyether and h-BN nanosheet, and the fire retardant is a microencapsulated ammonium polyphosphate and melamine cyanurate compound system. The preparation is completed through carrier mixing, nanosheet composite dispersion, fire retardant compounding and vacuum degassing. The application realizes high heat dissipation, high insulation, UL94 V-0 level halogen-free fire retardancy and more than 6 months of stable performance, solves problems such as high viscosity, slow heat dissipation, poor fire retardancy, environmental protection hidden danger and insufficient stability of traditional cooling liquids, and adapts to the safety cooling demand of high-multiplicity lithium iron phosphate battery packs.

The invention belongs to the technical field of lithium battery electrolytes, and relates to a wide temperature range electrolyte for a lithium metal battery, a preparation method and application thereof, the electrolyte comprises a lithium salt, N, N dimethyl-trifluoromethyl sulfonamide, an ether cosolvent, a hydrofluoroether diluent and a film-forming additive; the ether cosolvent comprises ethylene glycol dimethyl ether, ethylene glycol diethyl ether, cyclopentyl methyl ether, tetrahydrofuran and 2-methyltetrahydrofuran; the hydrofluoroether diluent comprises the following components: 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether, and 2, 2, 2-trifluoroethyl ether, and the hydrofluoroether diluent comprises the following components: 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether; the film-forming additive comprises lithium nitrate, vinylene carbonate and fluoroethylene carbonate; the working temperature range of the electrolyte is-40-60 DEG C, negative ions can be promoted to enter a lithium ion solvation sheath, construction of inorganic component-rich SEI in a wide temperature range is realized, and the wide temperature range cycle stability of the battery is improved.

The invention discloses a method for preparing perfluoropolyether with different molecular weights by a formula type solvent, and belongs to the technical field of perfluoropolyether preparation, the method comprises the following steps: mixing one or more hydrofluoroethers, an aprotic polar solvent and a catalyst, adding the mixture into a reaction kettle, introducing hexafluoropropylene oxide for polymerization until the reaction temperature reaches 25 + / -2 DEG C, and stopping the reaction to obtain the perfluoropolyether, the polymerization yield is greater than 95%; and controlling the type and ratio of the added hydrofluoroether to obtain perfluoropolyether with different molecular weights. The perfluoropolyether has the beneficial effects that the perfluoropolyether with specific molecular weight is prepared by combining different types of hydrofluoroethers with different proportions with other system compounds in the formula, and the perfluoropolyether is high in reaction yield, safe, environment-friendly, mild in condition and simple in process and can be widely applied in industry.

The present invention relates to processes for producing hydrofluoro(ether)olefins by the dehydrohalogenation of a perfluoroalkyl(ether)halide in an aqueous alkali metal hydroxide solution with an oxygen-containing catalyst.

To provide a method for producing a fluorine-containing polymer which suppresses the generation of fluoride ions during polymerization, a composition containing a fluorine-containing polymer and an aprotic solvent and having a low fluoride ion content, a fluorine-containing polymer having a low fluoride ion content and the like.SOLUTION: There is provided a composition containing a fluorine-containing polymer (A) and an aprotic solvent (B), wherein the composition contains 0.01 to 500 mass ppm of fluoride ions, the fluorine-containing polymer (A) contains, as its main component, a constitutional unit represented by formula (A1), formula (A2) or formula (A3) and the aprotic solvent (B) is at least one solvent selected from the group consisting of a perfluoroaromatic compound, a perfluorotrialkylamine, a perfluoroalkane, a hydrofluorocarbon, a fluoro cyclic ether, a hydrofluoroether and an olefin compound containing at least one chlorine atom.SELECTED DRAWING: None

The invention discloses an electronic liquid seal flame-retardant material and application thereof, the material comprises a fluorine-containing polymer, a rheology modifier and a functional nano-material in a mass ratio of (70-99.5): (0-20): (0-10); wherein the fluorine-containing compound is one or more of perfluoroether, perfluoroamine, perfluoroketone and hydrofluoroether; the rheology modifier is one or more of polytetrafluoroethylene, fatty acid, fatty acid salt, polyurea and hydrocarbon wax; the functional nano material is one or more of silicon oxide, aluminum oxide, aluminum hydroxide, magnesium hydroxide, hydrotalcite, clay and calcium carbonate. When the electronic liquid seal flame-retardant material is used for liquid seal of electronic devices and systems, flame-retardant and explosion-proof effects can be achieved.

This invention relates to the field of coating technology, specifically to an anti-corrosion electronic-grade coating agent and its preparation method. The anti-corrosion electronic-grade coating agent, by weight, comprises the following raw materials: 5-8 parts acrylate, 10-20 parts fluorinated acrylate, 9-11 parts fluorosilicone resin, 0.6-2 parts coupling agent, 0.06-1 part initiator, and 80-130 parts hydrofluoroether. The coating agent prepared by this invention exhibits excellent corrosion resistance, high adhesion, good insulation, and is safe to operate without a flash point.

The invention provides a preparation method and application of perfluorosulfonate. The structural formula of perfluoroether sulfonate is CF2 = CFOCF2CF2SO3M, and M = Li, Na, K or Ca; the preparation method comprises the following steps: adding alkoxide and a hydrofluoroether solvent into a cyclic compound as shown in a formula I in # imgabs0 # to obtain a reaction solution, and heating the reaction solution to obtain CF2 = CFOCF2CF2SO3M. According to the preparation method of the perfluorosulfonate, provided by the invention, the selectivity of the alkoxide and cyclic combination reaction is improved, so that the generation of byproducts is reduced, and the reaction yield is improved.

This application discloses a lithium-ion battery electrolyte, its preparation method, and its application. The provided lithium-ion battery electrolyte comprises a lithium salt and an organic solvent; wherein the lithium salt comprises a combination of at least two selected from lithium hexafluorophosphate, lithium difluorobis(oxalato)phosphate, lithium difluorosulfonylimide, and lithium di(oxalato)borate; and the organic solvent comprises 30wt%-50wt% hydrofluoroether, 10wt%-30wt% acetate, and 20wt%-60wt% carbonate. The provided lithium-ion battery electrolyte maintains the integrity of the separator structure, enables lithium salt to fill pores, and reduces separator permeability, thereby controlling possible separator shrinkage during temperature changes at low or high temperatures; it also suppresses crosstalk between the positive and negative electrodes caused by gas penetration, enabling batteries prepared using the provided lithium-ion battery electrolyte to exhibit good cycle performance and rate performance at low temperatures, and high safety at high temperatures.

The present invention relates to a cleaning agent composition which is excellent in cleaning property and does not corrode plastic substrates such as polycarbonate and polystyrene which are not resistant to solvents. The cleaning agent composition of the present invention comprises the following (A) to (C) components, the mass ratio of the (A) component and the (B) component being 11:89 to 99:1, (A) cis-1-chloro-3,3,3-trifluoropropene, (B) one or more compounds selected from the group consisting of hydrofluoroolefins, hydrofluorocarbons and hydrofluoroethers which do not contain a chlorine atom, and (C) a hydrocarbon solvent.

Provided is a cleaning solution having a low global warming potential value and having particle removal properties equal to or higher than those of conventional hydrofluoroethers. The present invention relates to a cleaning solution for removing particles, the cleaning solution containing a hydrofluoroether, the hydrofluoroether being a compound represented by general formula (1).

The invention belongs to the field of electrolytes, and particularly relates to a high-voltage wide-temperature-range composite electrolyte of a lithium metal battery and preparation and application of the high-voltage wide-temperature-range composite electrolyte, and the electrolyte is a solution containing conductive lithium salt, an organic solvent and an additive; wherein the organic solvent comprises a solvent A and a solvent B; the solvent A comprises a solvent with a structure # imgabs0 # as shown in a formula 1, and the solvent B comprises hydrofluoroether; wherein the solvent A accounts for 10 to 50 weight percent of the organic solvent; the concentration of the conductive lithium salt is 1-5M; the additive accounts for 0.5 wt%-5wt% of the total weight of the conductive lithium salt and the organic solvent; according to the present invention, the organic solvent containing the formula 1 and the additive containing the formula 2 are combined, and the content of each component is combined and controlled, such that the synergistic effect can be achieved, and the lithium metal battery and the high-voltage and ultra-wide temperature range application requirements can be met so as to meet the application requirements of the lithium metal battery and the high-voltage and ultra-wide temperature range application requirements of the lithium metal battery; and stable circulation in an ultra-wide temperature range can be realized under high pressure.

The invention discloses a method for preparing a hydrofluoroether and a fluorinated ester, wherein an alkali metal salt is mixed with a polar aprotic solvent, and an excess of fluorinated alcohol is slowly added dropwise under a cold bath environment until the reaction is complete; the reaction mixture is transferred to an autoclave, and perfluoro-2-methyl-2,3-epoxypentane is added, and the reaction is carried out for 0.5 to 5 hours under the conditions of a temperature of 5 to 85 ° C and a stirring speed of 100 to 400 rpm; the mixed product is transferred to a round-bottomed flask for rectification and purification, and the fractions of hydrofluoroether and fluorinated ester are collected respectively, and the fluorinated alcohol as a solvent is recovered and reused. The present invention uses a polar aprotic solvent and a fluorinated alcohol as a mixed solvent, and solves the problem that perfluoro-2-methyl-2,3-epoxypentane and a fluorinated alcohol salt are difficult to react under fluorinated alcohol conditions. At the same time, the yield can be increased to more than 80%, and the final product purity reaches 99.5%, and in addition, the product hydrofluoroether and fluorinated ester have great economic value.

This application discloses a battery cell, a battery, and an electrical device. One embodiment of the battery cell includes a negative electrode and an electrolyte. The negative electrode includes a current collector stacked on top of each other and an active material film containing active material particles, the active material particles being carbonaceous materials. The electrolyte includes a lithium salt, an organic solvent, and additives. The additives include a first additive and a second additive. The first additive includes a hydrofluoroether compound. The second additive has the general formula NO3-R1, where R1 includes substituted or unsubstituted carbonaceous heterocycles. The first additive in the electrolyte can reduce lithium-ion solvation. Further combined with the second additive, it is reduced and decomposed on the surface of the carbonaceous material to generate lithium nitrogen oxides, forming a dense, stable SEI film with high inorganic content on the surface of the carbonaceous material. This forms a stable interface layer between the carbonaceous material and the organic solvent, reducing side reactions between the carbonaceous material and the electrolyte, reducing lithium consumption, and improving cycle performance.