321 results about "Fluoride" patented technology

This invention relates to a method for preparing carbon materials based on in-situ surface fluoride modification, comprising the following steps: ① dissolving carbon material powder, aluminum nitrate, and polyvinyl alcohol in anhydrous ethanol to obtain an aluminum nitrate solution; ② dissolving ammonium fluoride in a mixed solvent to obtain an ammonium fluoride solution; slowly adding the ammonium fluoride solution dropwise to the aluminum nitrate solution to carry out an in-situ AlF3 growth reaction to obtain a composite material precursor; ③ drying the composite material precursor and then calcining it using a programmed temperature rise method to solidify the coating layer, thereby obtaining the AlF3@C composite material. This invention also discloses the application of this carbon material. The preparation method of this invention is simple and low-cost, and can efficiently prepare AlF3@C composite materials. The obtained AlF3@C composite material, as a negative electrode material for potassium-ion or lithium-ion secondary batteries, can significantly improve a series of properties such as the initial coulombic efficiency, rate performance, cycle stability, and potassium ion diffusion kinetics of the battery.

Disclosed are oral care compositions comprising: a tooth ligand mixture comprising a monocarboxylic acid, a dicarboxylic acid, and / or a tetracarboxylic acid; and a stannous ion source and a fluoride ion source, such as stannous fluoride. The oral care compositions show the ability to prevent and / or treat dental erosion and / or dental caries.

A composite separator for a lithium secondary battery according to aspects of this disclosure comprises: a porous organic polymer substrate; a porous inorganic heat-resistant layer coated on at least one surface of the organic polymer substrate, the porous inorganic heat-resistant layer comprising inorganic particles and an organic binder polymer holding the inorganic particles together; and an organic polymer adhesive layer coated on the outer surface of the porous inorganic heat-resistant layer, the organic polymer adhesive layer comprising a vinylidene fluoride-based polymer, wherein the organic polymer adhesive layer further comprises a compound having ethylene oxide repeating units and double bonds at the ends.

The present invention relates to the field of fluororubber synthesis, and disclosed is a preparation method for high-fluorine-content low-compression-set peroxide-cured fluororubber. In the method, vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene are used as mixed monomers to carry out polymerization reaction, wherein during the polymerization reaction, a cure-site monomer is added. By adjusting the composition ratio of the mixed monomers and uniformly and continuously adding the cure-site monomer, peroxide-cured fluororubber having high fluorine content, resistance to new energy battery media, and low compression set is prepared. The peroxide-cured fluororubber prepared by the method provided in the present invention has a fluorine content stably at 70-71%, a compression set stably less than or equal to 20%, a tensile strength of approximately 22 MPa, and an elongation at break greater than 180%. That is, the problem of relatively high compression set of peroxide-cured fluororubber (particularly high-fluorine-content peroxide-cured fluororubber) in new energy battery applications is effectively solved.

The application relates to the technical field of fluorine-containing wastewater treatment equipment, and discloses a fluorine-containing wastewater treatment device for praseodymium neodymium fluoride rare earth processing, which comprises a wastewater treatment tank, the top of the wastewater treatment tank is provided with a water inlet valve; a filtering and cleaning device comprises a water conveying pipeline vertically penetrating through the middle part of the top end of the wastewater treatment tank, the top end of the water conveying pipeline is communicated with the water inlet valve, the bottom of the water conveying pipeline is circular, uniform and horizontally provided with a plurality of water filtering channels, the bottom of each water filtering channel and the side far away from a water receiving disc are provided in an open mode, the bottom of the water filtering channel is covered with a first filter membrane, and the side far away from the water receiving disc of the water filtering channel is covered with a second filter membrane; when fluorine ions in fluorine-containing wastewater are separated and filtered through a filter membrane assembly, the filter time is effectively prolonged, the separation effect of the fluorine ions is improved, the surface of the filter membrane assembly is cleaned, and the effect of rare earth impurities on the membrane holes of the filter membrane is avoided.

The present application belongs to the field of piezoelectric gel materials, and particularly relates to a polyvinylidene fluoride polymer flexible piezoelectric hydrogel with island structure and a preparation method and application thereof. The flexible piezoelectric hydrogel is a three-dimensional continuous network formed by cross-linking of a hydrophilic polymer as a continuous phase, and polymer microspheres with uniform particle size formed by a hydrophobic polyvinylidene fluoride polymer as a uniformly dispersed dispersed phase. The island structure significantly improves the mechanical properties and piezoelectric properties of the gel. The piezoelectric gel material can be used for human sensing, detecting motion signals and pulse signals, and has high industrial production potential and biomedical application prospect.

A system and method for chemically destroying, degrading and incinerating a fluorocarbon or fluorinated material, such as perfluoroalkyl and polyfluoroalkyl substances (PFAS), with reduced emissions of gaseous PFC is provided. The method includes mixing the fluorinated material with an aqueous alkoxide base in a batch reactor to form a suspension. The PFAS can be provided by AFFF. The reaction mixture is heated to a temperature ranging from about 25ºC to about 400ºC for about 0.5 hours to about 240 hours to defluorinated fluorocarbons in the PFAS and produce a defluorinated waste product. More specifically, the method converts organic fluorine present in the PFAS to inorganic fluoride. Thus, the defluorinated waste product can be incinerated with reduced emissions of harmful gaseous PFCs.

This invention belongs to the technical field of rare metal extraction, specifically relating to a method for defluorinating rare earth ore leaching solutions. The steps are as follows: S1, adding ammonium bicarbonate to the rare earth ore leaching solution, clarifying, and then separating the solid and liquid to obtain filtrate A and filter residue A; S2, adding ammonium bicarbonate to filtrate A, separating the solid and liquid to obtain filtrate B and filter residue B; S3, adding concentrated sulfuric acid to filter residue A, adding filtrate B from step S2, separating the solid and liquid to obtain filtrate C and filter residue C; S4, adding oxalic acid solution to filtrate C, stirring and reacting, clarifying, and then filtering to obtain filtrate D and filter residue D; S5, adding calcium or magnesium salts to filtrate D, separating the solid and liquid to obtain CaF2 or MgF2 filter residue and filtrate E; S6, mixing filtrate B and filtrate E, recovering and continuing to use for leaching rare earth ore, with filter residue B and filter residue D being the defluorinated rare earth products. This method can eliminate fluoride ions at the source, improving the subsequent rare earth metal extraction rate and quality.

This invention discloses a highly efficient catalytic synthesis process for nicotinamide intermediates using the field of organic synthesis technology. The process includes: adding appropriate amounts of dichloronicotinic acid, organic solvent, lanthanum-doped composite metal fluoride-diatomaceous earth supported catalyst, and encapsulated 4A molecular sieve to a reaction vessel under nitrogen protection; purging with nitrogen, heating, and stirring; introducing anhydrous dimethylamine gas, controlling the pressure, and continuing stirring; after the reaction is complete, washing with sodium bicarbonate aqueous solution, washing with deionized water, drying, concentrating, and recrystallizing to obtain the target product. The lanthanum-doped composite metal fluoride-diatomaceous earth supported catalyst prepared by this invention is recyclable, has mild reaction conditions, high product yield, is environmentally friendly, and suitable for industrial production.

The present application relates to a kind of rotary kiln device of overhauling slag and lithiumite / cell powder calcination, it is related to rotary kiln related technical field, including supporting platform, feeding equipment, built-in cylinder, sliding groove, cylinder, built-in groove, anti-conclusion component, convex drag reduction component, extrusion type gas blowing component, cleaning component, the present application can solve in the mixed calcination process of overhauling slag and lithiumite / cell powder, fluoride in overhauling slag, cryolite and metal salt in cell powder, under high temperature environment of 800-1000 ℃, complex physical and chemical reaction occurs easily, form low melting point eutectic liquid phase, these liquid phase material has extremely high viscosity, surface tension and adhesion, will firmly adhere to kiln wall, only rely on gravity, these melts can only extremely slowly "creep" or "slip" on kiln wall surface, its root firmly adheres to the surface of heat-resistant layer, when kiln body rotates and it enters high temperature zone again, these melts will be re-baked hard, cause ring problem.

The application discloses a kind of Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material and its preparation method;The application uses organic-inorganic hybrid fluoride manganese salt material as Mn 4+ Source preparation Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material.The application uses organic-inorganic hybrid fluoride manganese salt material instead of all-inorganic fluoride manganese salt, manganese salt and permanganate as Mn 4+ Source, for preparing Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material, significantly improve the luminescent efficiency of Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material.

This utility model discloses an energy-saving device for treating fluoride-containing wastewater, including a sedimentation tank, a mixing tank on the side of the sedimentation tank, and a mixing component on the inner side of the mixing tank. The mixing component includes a support frame, which is rotatably mounted inside the mixing tank. Multiple spiral mixing frames are rotatably connected to the support frame, and a main mixing shaft is fixedly connected to the inner side of the support frame. A mixing fan blade is installed at the bottom of the main mixing shaft. A packing layer is installed inside the sedimentation tank, and a sludge pump is installed at the bottom of the sedimentation tank. An effluent tank is located on the side of the sedimentation tank away from the mixing tank. This design allows the mixing tank to occupy a small area. The rotation of the support frame drives the multiple spiral mixing frames to move in a circular motion, while the mixing fan blade at the bottom of the main mixing shaft also participates in the mixing. This multi-dimensional mixing method can quickly and thoroughly mix the fluoride-containing wastewater with the treatment agent, significantly shortening the mixing time and helping to more effectively remove fluoride ions from the wastewater.

This application belongs to the field of inorganic chemical waste recycling and fluoride preparation technology, specifically relating to a method for preparing potassium fluorotitanate from hydrofluoric acid waste liquid. The method includes: S1. Pretreatment of hydrofluoric acid waste liquid and titanic acid powder; S2. Adding the pretreated hydrofluoric acid waste liquid and titanic acid powder to a reaction vessel to generate a fluorotitanic acid solution; S3. Adding potassium carbonate to the fluorotitanic acid solution to generate potassium fluorotitanate, followed by purification of the reaction solution to obtain potassium fluorotitanate crystals; S4. Washing and drying the potassium fluorotitanate crystals to obtain a high-purity potassium fluorotitanate product. This application uses titanic acid powder as the titanium source and optimizes reaction parameters to achieve the dual goals of resource recovery from hydrofluoric acid waste liquid and low-cost preparation of high-purity potassium fluorotitanate.

The invention relates to a chemical polishing bath for polishing a titanium or titanium alloy component, or a part thereof, which chemical polishing bath comprises water, a fluoride complexing agent capable of forming a complex with oxidized titanium at an equivalent fluoride concentration of between 1.40 and 2.80 mol / L, phosphoric acid in a concentration of between 3 and 6 mol / L, together with sulfuric acid in a concentration of between 0.5 and 1.5 mol / L.The bath is particularly well suited to polishing components obtained from additive manufacturing (3D printing).

The application belongs to the technical field of photovoltaic devices, and relates to preparation and application of a multifunctional organic additive doped CsSnI3 perovskite film; during preparation, a perovskite spin coating liquid is spin coated on an ITO glass substrate to form a precursor film, and the precursor film is subjected to annealing treatment to obtain a CsSnI3 perovskite film; the perovskite spin coating liquid is formed by adding stannous fluoride and 3-amino-pyrazine-2-carboxamide (3-APCA) to a perovskite precursor solution and stirring; the perovskite precursor solution is formed by dissolving cesium iodide and stannous iodide in an organic solvent; and the application is applied to solar cells, light-emitting diodes, photoelectric detectors, photoelectric catalysis and energy storage. The method introduces the multifunctional organic additive 3-APCA, realizes Sn 2+ oxidation inhibition, optimizes film crystallinity and passivates defects, and significantly improves the quality of the CsSnI3 perovskite film; and the application range is wide.

The application discloses a method for synthesizing perfluoroketone and perfluoroacyl fluoride through electrofluorination. The method comprises the following steps: under the action of anhydrous hydrogen fluoride, raw material carbon-hydrogen ketone is subjected to electrolysis to synthesize perfluoroketone and corresponding by-product acyl fluoride and fluoroalkane. After the reaction is completed, liquid-phase perfluoroketone product is discharged from the bottom of a reaction kettle, acyl fluoride and fluoroalkane are collected through different low-temperature cold hydrazine, and excess non-condensable gas such as hydrogen is discharged from tail gas. The process of the application can synthesize various perfluorinated products through electrofluorination, and is simple in overall process operation, low in equipment investment, low in resource consumption, green and environment-friendly, and suitable for industrial production.

This invention discloses a method for directly preparing bis(fluorosulfonyl)imide from aminosulfonic acid, chlorosulfonic acid, and oxaloyl fluoride in a one-step reaction. This method has the advantages of simple operation, mild reaction conditions, fast reaction speed, and easy product purification.

This invention provides a method for recovering valuable metals from waste ternary lithium battery cathode materials. The recovery method includes: (1) reducing and leaching the black powder of waste ternary lithium battery cathode materials to obtain a leaching slurry, and removing impurities from the leaching slurry to obtain a ternary leachate; (2) extracting the ternary leachate to remove calcium and copper to obtain an organic phase loaded with calcium and copper and a raffinate after calcium and copper extraction; (3) treating the raffinate after calcium and copper extraction with resin to remove fluoride and phosphorus to obtain a solution after fluoride and phosphorus removal; (4) co-extracting the solution after fluoride and phosphorus removal with nickel, cobalt, and manganese to obtain a mixed solution containing nickel, cobalt, and manganese and a lithium-containing solution. The recovery method provided by this invention has a high recovery rate of valuable metals, thorough separation of impurities, and yields a battery-grade mixed solution of nickel, cobalt, and manganese that can be directly used to prepare ternary precursors. It also achieves lithium recovery. The recovery method is simple, efficient, and has low environmental pollution.

This invention relates to a high-temperature corrosion-resistant Fe-Cr-Mo-Ni alloy, its preparation method, and its applications. The alloy composition is 37%–40% Ni, 19%–29% Cr, and 5%–10.27% Mo, with the balance being Fe and trace impurities. X-ray diffraction of the alloy reveals a single-phase face-centered cubic structure. After holding at 800℃ for 400 hours, the area fraction of the σ phase in the microstructure does not exceed 5%. The breakdown potential in 3.5% NaCl solution is as high as 1.029 V, and its pitting corrosion resistance is superior to commercial 904L stainless steel. This alloy shows great promise for industrial application in the preparation of high-temperature resistant structural components operating under high corrosion conditions above 400–900℃, especially in service environments containing chloride ions, fluoride ions, or sulfides.

Disclosed is an etching liquid composition having excellent etching performance. According to one aspect, there is provided an etching liquid composition comprising: hydrogen peroxide; a phosphate; an amine having at least one or more hydroxyl groups; a fluoride; a tetraazacyclic compound having four nitrogen atoms within the ring; and a triazacyclic compound having three nitrogen atoms within the ring, and the weight ratio of the tetraazacyclic compound to the triazacyclic compound is 1:0.01 or more to 1:1.25 or less.

The present invention provides a method for manufacturing a container filled with acid fluoride that is unlikely to experience a decrease in the purity of the filled acid fluoride. The method for manufacturing a container filled with acid fluoride is a method for manufacturing a container filled with acid fluoride in which acid fluoride is filled into the container, wherein the container has at least an inner surface formed of a metal material and the surface roughness Rz of the inner surface is 0.01 μm or more and 10 μm or less. The method comprises a treatment process in which a treatment gas containing a treatment acid fluoride for treating the inner surface is introduced into the container and the treatment acid fluoride is brought into contact with the inner surface at a temperature of 160°C or less, a discharge process in which the treatment gas introduced into the container during the treatment process is discharged from the container, and a filling process in which acid fluoride for storage in the container is filled into the container after the discharge process.

This invention discloses a composite defluoridating agent for deep defluorination of water and its preparation method. The defluoridating agent is an aqueous solution of a metal salt or an aqueous solution of a metal salt dispersed with nanoparticles. The active ingredient of the defluoridating agent contains at least three metal ions: lanthanum, aluminum, and zinc, and the molar ratio of La, Al, and Zn is 1~4:3~5:1~3. The pH of the aqueous solution is 6.0~6.5. Compared with traditional PAC, which requires more than 5 mmol / L to reduce fluoride ions to 1 mg / L, the composite defluoridating agent of this invention only requires 1.2 mmol / L (based on the total concentration of active ingredients) to reduce fluoride ions to below 1.0 mg / L, significantly reducing treatment costs and sludge production. In addition, this invention has a fast settling speed, achieving solid-liquid separation within 10 minutes. In the preferred scheme containing nanoparticles, magnetic adsorption settling can be completed within 5 minutes, greatly shortening the water treatment process cycle.

The purpose is to provide an aqueous composition or the like for treating the surface of an aluminum-containing metal so that a material other than a metal can satisfactorily adhere to the surface of the metal. The present disclosure relates to an aqueous composition for treating the surface of an aluminum-containing metal, the aqueous composition containing 0.01-15.00 mass% of hydrogen peroxide, 0.10-15.00 mass% of fluoride ions, 0.10-30.00 mass% of phosphoric acid, and 0.10-15.00 mass% of chloride ions with respect to the total amount of the aqueous composition.

This invention provides a method and apparatus for accurately determining the solubility of rare earth oxides in high-temperature molten salt. It relates to the field of rare earth oxide solubility detection technology, and overcomes the measurement errors caused by severe volatilization of molten salt under high-temperature conditions and the presence of undissolved rare earth oxide or rare earth fluoride particles in the obtained samples, which are present in existing technologies. Furthermore, by using rare earth fluorides instead of rare earth oxides, the amount of rare earth oxides dissolved in the rare earth fluoride-alkali metal fluoride mixed molten salt can be accurately measured, avoiding indirect analysis errors and greatly improving the accuracy of rare earth oxide solubility determination results in high-temperature molten salt.

The utility model discloses a kind of high-pressure hydrogen storage container inner wall hydrogen barrier structure, including high-pressure hydrogen storage container, the high-pressure hydrogen storage container inner wall surface is sandblasted or inner grinding treatment, form the base of roughness Ra0.8-1.6 μm, nano-porous FeF2 transition layer, CrF3 main anticorrosion layer and TaF5 / NiF2 lubricating layer are sequentially arranged on the base.The utility model is without corrosion crack after 72 hours hydrogen permeation test, corrosion rate is reduced to 0.01mm / a below;Substrate tensile strength retention rate is ≥95%;Fluoride film layer life is more than 3 times higher than traditional plating layer.

The disclosure provides a composite semi-solid electrolyte membrane with carbon-carbon double bond structure and a preparation method, the composite semi-solid electrolyte membrane comprises: a modified polymer matrix, which is obtained by treating polyvinylidene fluoride or its copolymer with a metal hydroxide solution, the treatment forms a carbon-carbon double bond structure on the polymer backbone, and in-situ generates and uniformly disperses inorganic fluoride particles in the modified polymer matrix; reinforcing fibers, which are dispersed in the modified polymer matrix and interweave to form a three-dimensional network skeleton; and additives, which are dispersed in the modified polymer matrix and used to provide lithium ion carriers for the lithium ion battery. The disclosure realizes the synergistic improvement of the ion conductivity, mechanical strength and thermal stability of the composite semi-solid electrolyte membrane by generating carbon-carbon double bond structure and inorganic fluoride through chemical modification and combining with the fiber reinforcement technology, and exhibits good application prospect in the semi-solid lithium ion battery.

Systems and methods are provided for treating, degrading, and incinerating fluorocarbons or fluorinated materials, such as Freon ® with reduced gaseous perfluorinated compound (PFC) emissions. The methods include mixing a fluorinated material with a hydroxide base and optionally a solvent system (e.g., diglyme, polyether, polyether alcohol, polyethylene glycol selected from ethylene glycol and PEG 50 to PEG 3350, N-methyl pyrrolidine, dihydrolevogluton, and / or water ("solvent")) in a batch reactor to form a reaction mixture (also referred to as a suspension). The reaction mixture is heated to a temperature in the range of about 25 °C to about 400 °C for about 0.5 hours to about 240 hours to defluorinate the fluorinated material and produce a defluorinated waste product. More specifically, the methods convert organic fluorine present in the fluorinated material, such as Freon ® to inorganic fluorides. As a result, the defluorinated waste product can be incinerated with reduced harmful gaseous PFC emissions.

The application provides an aluminum pad structure and a manufacturing method thereof. The manufacturing method of the aluminum pad structure comprises the following steps: sequentially forming a first aluminum layer, a protective layer and a passivation layer on a substrate; performing dry etching on the passivation layer by using a plasma containing fluoride ions to form a passivation layer opening, wherein the passivation layer opening is located above a preset region of the first aluminum layer and the bottom surface of the passivation layer opening stays on the surface of the protective layer; then forming a second aluminum layer on the protective layer and removing the part of the second aluminum layer which is higher than the passivation layer, thereby obtaining a sandwich-type aluminum pad structure composed of the first aluminum layer, the protective layer and the second aluminum layer. The manufacturing method of the aluminum pad structure can avoid the direct contact of the etching process with the aluminum pad, thereby eliminating the generation of aluminum fluoride compound residues and fluoride ion residues on the surface of the aluminum pad from the root. The aluminum pad structure is in a sandwich type, has less aluminum fluoride compound residues and fluoride ion residues, is beneficial to improve the bonding and yield test results, and reduces fluorine precipitation.

The objective is to provide a fluorine-containing polymer film. This objective can be achieved by a fluorine-containing polymer film having a thermal shrinkage rate of 0.4% or less after heating at 90°C for 1 hour and a dielectric constant of 3 to 50 at 25°C and 1000 Hz, or by a fluorine-containing polymer film having a degree of crystallinity of 50% or more and an elongation at break of 400% or more.

This invention provides a multi-surface modified O2-type lithium-rich manganese-based material and its preparation method, belonging to the field of O2-type lithium-rich manganese-based cathode materials. This invention first coats a Na-based P2-type precursor with fluoride, followed by ion exchange to obtain an O2 structure. This improves the rate performance of the O2-type lithium-rich manganese-based material and avoids the phase transition (O2 to O3). An oxide coating layer is prepared on the surface of the fluorine and lithium compound-containing O2-type lithium-rich manganese-based material using metal alkoxides. This allows for low-temperature preparation of the oxide coating layer, preventing the O2 structure from transforming into the O3 structure and improving cycle stability. The multi-coating process suppresses the release of reactive oxygen species during charging, improving the first-cycle coulombic efficiency. The multi-surface modified O2-type lithium-rich manganese-based material prepared by this invention exhibits high first-cycle coulombic efficiency and cycle stability.