31 results about "Trifluoride" patented technology

The invention belongs to the technical field of regeneration of waste storage battery positive electrode materials, and particularly relates to a regeneration method of waste lithium iron phosphate and regenerated lithium iron phosphate. The regeneration method of the waste lithium iron phosphate provided by the invention comprises the following steps: mixing a waste lithium iron phosphate positive electrode material containing PVDF, an alkaline lithium source, an iron source and an accelerant, and then sequentially carrying out two stages of calcination treatment in a non-oxidizing atmosphere: in the first stage of calcination treatment, enabling the accelerant to promote the combination of iron and fluorine to generate iron trifluoride; second-stage calcination treatment is carried out to complete carbonization and lithium supplementation of PVDF; the accelerant is ammonium salt. According to the present invention, the reaction between the fluorine generated by PVDF pyrolysis and the iron source is promoted by using the accelerator to generate iron trifluoride so as to inhibit the generation of lithium fluoride, such that the iron trifluoride doping modification is achieved, the hydrocarbon component generated by PVDF pyrolysis is carbonized to form the carbon layer so as to improve the conductivity, and the obtained regenerated lithium iron phosphate has excellent specific capacity and excellent cycle performance.

The invention belongs to the technical field of special ceramic preparation, and particularly relates to high-strength special ceramic and a preparation method thereof. The high-strength special ceramic is prepared from the following raw materials: alumina powder, quartz powder, serpentine, phosphorus slag, eucryptite, barium borate, nano yttrium trifluoride, nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane. According to the high-strength special ceramic disclosed by the invention, the aluminum oxide powder, the quartz powder, the serpentine and the phosphorus slag are taken as matrix raw materials, eucryptite, barium borate and yttrium trifluoride are taken as fluxing agents, and nano hafnium boride, nano strontium zirconate, nano lanthanum titanate and polyborosilazane are taken as fillers, so that the prepared special ceramic has excellent bending strength and fracture toughness.

The object of the present invention is to provide a fluoride compound remover that can remove fluorine compounds, particularly phosphoric acid trifluoride (PF3), from exhaust gas. [Solution] The above problem is solved by a fluoride compound remover that contains 60-98% by weight of manganese (Mn) calculated as MnO and 0.5-20% by weight of alkali metals calculated as oxides, and does not contain calcium (Ca).

The invention discloses a preparation, forming and evaluation method of a renewable H2S adsorption material, and relates to the technical field of adsorption materials, and the preparation method comprises the following steps: adding a tetrahydrofuran solution, an N, N-dimethylformamide solution, water and hydrochloric acid into a scandium trifluoride solid and biphenyltetracarboxylic acid, and carrying out ultrasonic dispersion; reacting at 75 DEG C for 72 hours; after cooling to room temperature, carrying out suction filtration, taking crystals, cleaning and drying, and synthesizing the H2S renewable adsorption material; dissolving a binder in water to prepare a binder solution; mixing the synthesized H2S renewable adsorption material with a methylcellulose solid, adding the mixture into a binder solution, and mixing and stirring; molding and granulating through a banded extruder, and then drying to obtain a molded adsorption material; and placing the formed adsorption material in a stainless steel measuring tube, carrying out adsorption and desorption treatment, repeating the operation, and evaluating the material. The adsorbent prepared by the method can realize normal-temperature or low-temperature renewable adsorption and desorption, and is energy-saving, efficient, high in adsorption capacity, high in adsorption and desorption evaluation and high in practicability.

The invention belongs to the technical field of concrete, and particularly relates to basalt fiber composite modified sprayed concrete and a preparation method thereof. The basalt fiber composite modified sprayed concrete is prepared from the following raw materials in parts by weight: 420 to 470 parts of cement, 200 to 220 parts of water, 830 to 860 parts of sand, 840 to 880 parts of gravel, 40 to 60 parts of admixture, 15 to 30 parts of modified basalt fiber, 2 to 6 parts of polycarboxylate superplasticizer and 5 to 12 parts of alkali-free accelerator. The modified basalt fiber is added into the sprayed concrete to serve as a reinforcing phase, the strength and impact toughness of the concrete can be improved, and the later strength of the concrete is guaranteed. The cerium trifluoride modified fly ash is added into the admixture, so that the rebound rate can be reduced, and the early strength of the concrete is improved.

The application provides a solid-state electrolyte interface protection layer, a preparation method and a solid-state battery, and relates to the technical field of solid-state batteries.The preparation method of the solid-state electrolyte interface protection layer provided by the application comprises the following steps: a mixed suspension with vanadium trifluoride nanoparticles is sprayed on the surface of a solid-state electrolyte substrate and deposited, and then, under the action of a low-energy electron beam in a vacuum environment, the interface protection layer is in-situ solidified.The application can improve the interface compatibility between the solid-state electrolyte and the electrode interface, effectively relieve the cyclic mechanical stress generated by the electrode material in the cycle process, and improve the performance and cycle life of the solid-state battery.

The invention relates to the field of thermal batteries, and discloses a FeF3 / FeOF composite positive electrode material with a heterostructure and a preparation method of the FeF3 / FeOF composite positive electrode material. The preparation method comprises the following steps: dissolving ferric salt in an alcohol reagent added with an additive, then dropwise adding an ammonium fluoride or ammonium bifluoride aqueous solution to prepare an iron trifluoride hydrate compound, and further preparing the FeF3 / FeOF thermal battery positive electrode material with a heterostructure through a roasting method. Wherein the appearance of FeOF can introduce out-phase energy level, the FeOF and FeF3 form a Schottky heterojunction, a built-in electric field of a compound interface is formed, the migration rate of electrons and ions in a material body phase is promoted, and the instantaneous discharge power is improved. In addition, the interface of the FeF3 / FeOF compound is also an important active site for storing ions, so that the specific capacity of the material is improved.

A Ramjet solid fuel comprising up to 50% metal by weight selected from the group consisting of aluminum, boron, boron carbide, magnesium, titanium, and titanium boride; between 2.0 and 9.0 weight percent fluorinated combustion aids selected from the group consisting of 3-hydroxybenzo trifluoride (3HBTF), hydroxyfluoro-2-propanol (HF2P), polytetrafluoroethylene, and trifluoroethanol (TFE); and up to 48% by weight of the remaining component being a hydroxyl terminated, epoxidized polybutadiene polymer (Poly BD 605E) (HO—CH2-CH═CH—CH2-CH2-CH—O—CH—CH2-CH2-CH—(CH═CH2)-CH2-CH═CH—CH2-CH2-CH—O—CH—CH2-OH).

The application provides a high-inductance copper-iron co-fired inductor, which comprises soft magnetic metal powder, a copper conductor and nanocrystalline strip material, the copper conductor is connected perpendicularly with the nanocrystalline strip material and is embedded in the soft magnetic metal powder, and the copper conductor extends out of the soft magnetic metal powder at both ends; the soft magnetic metal powder comprises mixed powder of different particle size gas atomized iron-nickel-molybdenum powder, a passivating agent, a coating agent and a lubricant; the passivating agent is a mixed solution of oxalic acid and nitric acid; the coating agent is a mixture of fluorosilicon resin, titanium trifluoride, aluminum trifluoroacetyl acetonate and nanometer barium titanate acetone solution; the lubricant is a mixture of gas phase aluminum oxide and niobium diselenide; the thickness of the nanocrystalline strip material is 1-1.5 um, and the width is 2-4 mm. The application uses the gas atomized iron-nickel-molybdenum powder with the highest magnetic permeability in the soft magnetic metal powder, so that the inductance value of the inductor reaches the maximum value, and the gas atomized iron-nickel-molybdenum powder has very low loss and excellent stability, so that the inductor has good loss performance and excellent reliability.

The present application relates to the technical field of pesticides, and provides a kind of high stability pyraclostrobin suspending agent and a preparation method thereof.A kind of high stability pyraclostrobin suspending agent, raw materials include pyraclostrobin, dispersing agent, wetting agent, thickening agent and water, and the dispersing agent is trifluoride containing hydroxyl group.Through the above technical scheme, the problem of poor stability of the related art nanoscale pyraclostrobin suspending agent with good efficacy is solved.

The method for preparing phosphorous trifluoride according to the present invention comprises the steps of: controlling the particle size (D50) of NaF to 67 μm to 137 μm; and reacting the particle size-controlled NaF, PCl3, and a solvent to prepare phosphorus trifluoride. By maximizing reactivity through control of the NaF particle size, the conversion rate of NaF can be increased, thereby suppressing the generation of unreacted NaF. Further, the selectivity for phosphorus trifluoride is excellent, and the preparation cost can be reduced.

The invention discloses a multilayer film with Faraday rotation and anti-reflection functions and a preparation method thereof, and belongs to the technical field of magneto-optical devices. Tantalum pentoxide (Ta2O5) and cerium trifluoride (CeF3) are adopted as high and low refractive index film layer materials of the multilayer film, an eight-layer film structure is formed by alternate deposition on a silicon dioxide glass substrate, the structure design is (0.25 H < 0.25 > L < 0.25 > H < 0.25 > L < 0.25 > H < 0.25 > L < 0.25 > H < 0.25 > L), the thickness of each layer is lambda / 4n, and lambda is reference wavelength 1064nm; the multilayer film is prepared through a physical vapor deposition process by selecting an electron beam evaporator and combining specific parameter combination, firstly, SiO2 glass is cleaned with absolute ethyl alcohol and pure water, and then pre-melted CeF3 and Ta2O5 film materials and the SiO2 glass are placed in the electron beam evaporator to be subjected to multilayer film deposition to obtain the multilayer film.

This invention relates to a method for preparing manganese trifluoride catalyst and its application, belonging to the field of chemical technology. The method includes the following steps: S1, adding manganese powder to a reactor and preheating the reactor; S2, adding nitrogen trifluoride to the reactor and maintaining the reactor temperature until the reaction is complete; S3, the manganese powder and nitrogen trifluoride react to generate manganese trifluoride and nitrogen gas. After the reaction is complete, excess fluorine gas and the nitrogen gas produced in the reaction are removed for tail gas treatment, and the product manganese trifluoride is collected; S4, the prepared manganese trifluoride is added to an octafluoropropane synthesis reactor for use as a catalyst. This invention utilizes the decomposition of nitrogen trifluoride at a certain temperature to generate free fluoride ions, which react completely with manganese powder to generate manganese trifluoride. The reaction process is stable and can achieve continuous industrial production. The conversion rate of octafluoropropane synthesis can be effectively improved through the catalysis of manganese trifluoride.

The invention provides a method for preparing indium trifluoride in a continuous gas phase, which comprises the following steps of: performing atomization, sublimation or fluidization pretreatment on an indium source in an inert carrier gas atmosphere to form a gaseous or superfine particle indium source material flow; continuously introducing the indium source material flow and fluorine-containing gas into a continuous reactor with a function of mechanically updating a reaction interface, and carrying out gas-phase fluorination reaction at the reaction temperature of 500-900 DEG C to generate a gas-solid mixture containing indium trifluoride solid and tail gas; wherein the feeding molar ratio of an indium element in the indium source to a fluorine element in the fluorine-containing gas is 1: (3.0-6.5); and performing continuous gas-solid separation on the gas-solid mixture obtained in the step S2. Through specific reactor selection and process parameter coupling, the preparation difficulties that the efficiency is low, the energy consumption is high, the product consistency is poor and the metal indium is easy to sinter and coat when the indium trifluoride is prepared by an existing intermittent method are overcome, the safe and continuous production of the indium trifluoride is realized, and the product purity reaches the electronic grade standard.

The invention relates to a catalyst, in particular to a catalyst composition for synthesizing a hexafluoropropylene dimer, a preparation method of the catalyst composition and a synthesis method of the hexafluoropropylene dimer, the catalyst composition comprises a catalyst A and a carrier A, the carrier A is selected from at least one of activated aluminum oxide and fluorinated-aluminum oxide; the main catalytic component A is selected from at least one of nickel oxide, magnesium oxide, manganese oxide and calcium oxide; the co-catalysis component A is selected from at least one of zirconium oxide, praseodymium oxide, neodymium oxide, lanthanum oxide and cerium oxide; the carrier B is selected from at least one of activated carbon and graphite; the main catalytic component B is selected from at least one of cesium fluoride and rubidium fluoride; and the co-catalysis component B is selected from at least one of copper fluoride, potassium fluoride and iron trifluoride. Compared with the prior art, the defect that the conversion rate, the selectivity and the service life are difficult to reach the standard at the same time in the prior art is overcome. The catalyst system designed by the invention can realize excellent catalytic activity and very long catalyst life.

The application provides a process and device for high-quality boron isotope separation, comprising an exchange rectification system, a complexing system, a complex cracking system and a boron-11 refining system, natural abundance boron trifluoride isotopes are separated through the exchange rectification tower, and the circulation and regeneration of boron trifluoride and anisole are realized through the complexing system and the cracking system. The boron-11 refining system is arranged to further improve the abundance of boron-11. The application can realize the industrialized continuous production of 99% abundance high-quality boron-10 trifluoride and 99.9% abundance high-quality boron-11 trifluoride simultaneously, and the process is simple and has strong operability.

The invention relates to a sodium-ion battery electrolyte, a preparation method thereof and a sodium-ion battery, and belongs to the technical field of sodium-ion battery electrolytes. The electrolyte is a mixture of an electrolyte A and an electrolyte B, wherein the mass ratio of the electrolyte A to the electrolyte B is (0.5-5): (5-9.5); the electrolyte B comprises electrolyte salt, a film forming additive, an impedance reducing additive, a viscosity reducing additive, a functional additive and a solvent B; the functional additive is at least one of pyridine boron trifluoride salt, pyridine trifluoroacetamide salt, pyridine trifluoroacetate, 1-(2-pyridyl) trifluoroethylamine and pyridine; the electrolyte A comprises electrolyte salt, sodium tetrafluoroborate and a solvent A; when the electrolyte is used in the sodium ion battery, the charge-discharge efficiency and the good cycle performance of the battery in use at the normal temperature and the low temperature of-20 DEG C can be well considered, and the development of the fields of energy storage in cold regions and electric vehicles can be promoted.

The invention relates to the technical field of neodymium-iron-boron magnets, in particular to a preparation method of a high-coercivity neodymium-iron-boron magnet containing high-abundance rare earth, and the preparation method comprises the following steps: S1, preparing alloy powder; s2, micro powder preparation; s3, preparing mixed powder; s4, molding preparation; and S5, post-processing. According to the preparation method, the micro powder is added, the tungsten disulfide can be used as a carrier in the preparation of the micro powder, the lubricating property of the tungsten disulfide is beneficial to reducing powder agglomeration and improving the uniformity of the material in the mixing process, a uniform colloidal solution can be formed through treatment of oleylamine and octadecene, and the tungsten disulfide is nanocrystallized through ultrasonic and heat treatment; according to the preparation method, the specific surface area is increased, mixing with other components is facilitated, the activity of the micro powder is enhanced, dysprosium trifluoride is decomposed in the sintering process of dysprosium trifluoride, so that dysprosium atoms replace neodymium in a neodymium-iron-boron main phase, magnetocrystalline anisotropy is improved, the demagnetization resistance of a magnet is effectively improved, and the purpose of improving the coercive force is achieved.

The invention particularly relates to a nitrogen trifluoride raw material electrolyte preparation device and method.The device comprises an HF storage tank, an ammonia conveying unit, an electrolyte preparation unit and an electrolyte storage tank, the HF storage tank and the ammonia conveying unit communicate with the electrolyte preparation unit through pipelines, and the electrolyte preparation unit communicates with the electrolyte storage unit through a pipeline; the ammonia gas conveying unit comprises a liquid ammonia storage tank, a liquid ammonia conveying pump, an ammonia vaporizer and an adsorption tower which are sequentially communicated along the material flow direction; and the electrolyte preparation unit comprises a mixing reaction kettle and an electrolyte heat exchanger. According to the method, liquid hydrogen fluoride and liquid ammonia are pumped from a storage tank to a mixing reaction kettle, hydrogen fluoride reacts with ammonia gas to generate a molten electrolyte of NH4HF2 and HF, the electrolyte is conveyed through a circulating pump after the reaction, one part of the electrolyte is stored in an electrolyte storage tank, and the other part of the electrolyte is cooled by a heat exchanger and then returns to the reaction kettle to maintain the temperature stable. The method has the advantages of energy conservation, high product purity, high yield and the like.

In order to solve the technical problem of low purity of terbium fluoride produced by an existing preparation method of terbium trifluoride, the invention provides a preparation method of crystal-grade terbium trifluoride, which comprises the following steps: firstly, dissolving high-purity terbium nitrate hydrate crystals into a terbium nitrate solution, reacting with an ammonium carbonate solution, and centrifuging and washing synthetic liquid to obtain high-purity terbium carbonate; then reacting electronic-grade hydrofluoric acid with high-purity terbium carbonate, and centrifuging and washing the synthetic liquid to obtain a terbium trifluoride filter cake; adding the terbium trifluoride filter cake into an ammonium bifluoride solution, concentrating, crystallizing and filtering to obtain terbium trifluoride wrapped by ammonium bifluoride crystals, finally drying the terbium trifluoride wrapped by the ammonium bifluoride crystals at low temperature to remove moisture, and drying at high temperature in a gradient manner under the protection of nitrogen to obtain crystal-level terbium trifluoride. According to the method disclosed by the invention, terbium fluoride with the purity of 99.99% or above can be produced.

The utility model belongs to a device for synthesizing and purifying high-purity antimony pentafluoride. Comprising a raw material adding unit, the raw material adding unit is connected with a high-purity antimony pentafluoride purification unit through an antimony pentafluoride synthesis unit, and the high-purity antimony pentafluoride purification unit is connected with a high-purity antimony pentafluoride filling steel cylinder; the raw material adding unit comprises a nitrogen trifluoride steel cylinder for storing nitrogen trifluoride and a storage tank for storing metal antimony powder; the method has the advantages that equipment investment and personnel operation skill requirements can be reduced, life safety of field personnel is guaranteed, combustion-supporting gas is not generated in the reaction process of nitrogen trifluoride and metal antimony, the reaction is mild, and the method has the advantages of being high in safety and not prone to generating explosion risks.

A process for preparation of 3-Trifluoromethyl acetophenone oxime of formula I includes reacting an isomeric mixture of halo benzotrifluoride with Mg metal in an organic solvent in presence of a catalyst to obtain a Grignard complex. The Grignard complex is reacted with a ketene in hydrocarbon solvent in presence of transition metal ligand-acid complex to obtain an isomeric mixture of trifluoromethyl acetophenone. Finally, the isomeric mixture of trifluoromethyl acetophenone is reacted with hydroxylamine salt to obtain compound of formula I.

The invention discloses a preparation method of a carbon nano island modified ferric trifluoride hydrate positive electrode material. The carbon nano island modified ferric trifluoride hydrate material is produced by adopting a wet chemical reaction-continuous anhydrous oxygen-free fluorination-oxygen-free high-speed ball milling process, and the method comprises the following steps: carrying out continuous fluorination on ferric hydroxide obtained by reacting a positive ferric ion-containing metal salt raw material with a hydroxyl-containing alkali solution by using anhydrous oxygen-free fluorine; the iron trifluoride hydrate obtained after cooling and sieving and conductive carbon are subjected to sufficient oxygen-free high-speed ball milling, the iron trifluoride hydrate material modified by the carbon nano island is obtained, the size of the material is within the range of 1-20 microns, the material is of a mottle layered structure, the size of the carbon nano island is within the range of 50-200 nm, and the material is of an island-shaped structure. The method is simple in preparation flow, controllable in process, good in stability, capable of achieving batch production and suitable for macro preparation.

The invention provides a preparation method of rare earth fluoride. The preparation method comprises the following steps: mixing a rare earth raw material with a fluorinating reagent, reacting under a ball milling condition, and then carrying out optional calcining treatment to obtain the rare earth fluoride. The method disclosed by the invention can be used for obtaining the rare earth trifluoride and the composite rare earth fluoride, is simple to operate, mild in condition, green, safe and efficient, and is suitable for industrial large-scale production.

The present invention discloses a cost-effective and industrially amenable process for the preparation of 2-bromo-5-fluoro trifluorotoluene of formula (I) from 3-fluoro benzotrifluoride of formula (II).

Gearbox with a sealed housing, wherein a thermal expansion compensation material with a negative coefficient of thermal expansion is arranged inside the housing of the gearbox, characterized in that the thermal expansion compensation material is scandium trifluoride.

The invention discloses a preparation method of a fluorine-containing molybdenum disulfide coating. The preparation method comprises the following steps: bombarding and cleaning the surface of a substrate by adopting an argon ion source; depositing a molybdenum disulfide coating on the surface of the bombarded and cleaned matrix, and cooling along with the furnace; and the cooled matrix containing the molybdenum disulfide coating is conveyed into a plasma treatment chamber, mixed gas of carbon tetrafluoride and argon is introduced, plasma treatment is conducted on the surface of the molybdenum disulfide coating, and the fluorine-containing molybdenum disulfide coating is obtained. According to the method, the surface of the molybdenum disulfide coating is treated through carbon tetrafluoride plasma, fluorine atoms are introduced into the coating to fill up sulfur vacancies formed when the molybdenum disulfide coating is deposited through magnetron sputtering, the S / Mo ratio in the coating is obviously increased, the crystal preferred orientation of the coating is converted from (002) to (100), and therefore the density and mechanical performance of the coating are improved; meanwhile, the fluorine element and the molybdenum element are combined on the surface to form molybdenum trifluoride with lubricating performance, so that the lubricating performance of the coating is improved, and the coating has low friction coefficient and wear rate.

The invention discloses a preparation method of m-nitrobenzotrifluoride based on a supercritical / subcritical technology, and the disclosed scheme is as follows: benzotrifluoride and a nitrating agent are mixed in a supercritical / subcritical fluid environment for nitration reaction to generate a trifluoromethyl nitrobenzene product. According to the method disclosed by the invention, the nitration process is enhanced by utilizing the supercritical / subcritical fluid, the mass and heat transfer efficiency is high, the raw material trifluorotoluene is nearly completely converted, the selectivity of the product m-nitro trifluorotoluene is high, meanwhile, the acid consumption in the nitration process is greatly reduced, and the technical process is more environment-friendly and efficient.

An ammonium fluoride gas may be used to form a protection layer for one or more interlayer dielectric layers, one or more insulating caps, and / or one or more source / drain regions of a semiconductor device during a pre-clean etch process. The protection layer can be formed through an oversupply of nitrogen trifluoride during the pre-clean etch process. The oversupply of nitrogen trifluoride causes an increased formation of ammonium fluoride, which coats the interlayer dielectric layer(s), the insulating cap(s), and / or the source / drain region(s) with a thick protection layer. The protection layer protects the interlayer dielectric layer(s), the insulating cap(s), and / or the source / drain region(s) during the pre-clean process from being etched by fluorine ions formed during the pre-clean process.

An ammonium fluoride gas may be used to form a protection layer for one or more interlayer dielectric layers, one or more insulating caps, and / or one or more source / drain regions of a semiconductor device during a pre-clean etch process. The protection layer can be formed through an oversupply of nitrogen trifluoride during the pre-clean etch process. The oversupply of nitrogen trifluoride causes an increased formation of ammonium fluoride, which coats the interlayer dielectric layer(s), the insulating cap(s), and / or the source / drain region(s) with a thick protection layer. The protection layer protects the interlayer dielectric layer(s), the insulating cap(s), and / or the source / drain region(s) during the pre-clean process from being etched by fluorine ions formed during the pre-clean process.