21 results about "Zinc fluoride" patented technology

The invention provides chlorotrifluoroethylene continuously prepared based on a microchannel reactor and a preparation method of the chlorotrifluoroethylene, and the chlorotrifluoroethylene comprises the following raw materials in parts by weight: 1, 1, 2-trifluoro-1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The low-temperature refrigerant refrigerant is prepared from the following components in parts by weight: 90 to 100 parts of 1, 2-trichloroethane, 1 to 5 parts of a zinc fluoride induced palladium-copper bimetallic catalyst, 8 to 15 parts of a cyclohexyl dimethyl ether-formic acid composite hydrogen donor, 0.5 to 2 parts of trifluoroacetic anhydride, 0.1 to 0.5 part of a perfluoropolyether lubricant, a proper amount of a low-temperature mixed refrigerant and 15 to 20 percent by weight of diluted hydrochloric acid. According to the invention, the preparation efficiency and product purity of chlorotrifluoroethylene can be improved, and stable operation of the preparation system and reasonable treatment of byproducts can be guaranteed.

The invention discloses a polymer solid electrolyte membrane and application thereof. The polymer solid electrolyte membrane is prepared from 5-15 parts by mass of a polymer, 4-10 parts by mass of a lithium salt, 3-6 parts by mass of a material for constructing a lithium-loving and lithium-phobic layer, 0.5-1.5 parts by mass of a plasticizer and 30-50 parts by mass of a solvent. And the material for constructing the lithium-loving and lithium-phobic layer is one of N-methyl-2, 2, 2-trifluoroacetamide, zinc bis (trifluoromethanesulfonamide) and silver bis (trifluoromethanesulfonamide), and one of zinc fluoride and silver fluoride, and the material for constructing the lithium-loving and lithium-phobic layer is one of N-methyl-2, 2, 2-trifluoroacetamide, zinc bis (trifluoromethanesulfonamide) and silver bis (trifluoromethanesulfonamide). The lithium-loving and lithium-phobic layer is synchronously constructed on the surface of the lithium metal negative electrode, uniform deposition of lithium metal is promoted, growth of lithium dendrites is inhibited, contact between the lithium metal negative electrode and a solid electrolyte interface is improved through uniform generation of the SEI layer, and the cycling stability and safety of the lithium metal negative electrode are remarkably improved.

The invention relates to the technical field of chemical engineering, in particular to a method for preparing antibacterial functional core-shell silicon dioxide from fluorine-containing silicon slag, which comprises the following steps: S1, silicon slag pretreatment: mixing silicon slag with water to prepare slurry, sanding the slurry, and controlling the particle size D50 of SiO2 in the sanded silicon slag to be less than 200nm; s2, alkali activation and silicon release: mixing the sanded slurry with an alkali solution, carrying out a hydrothermal reaction, and controlling the silicon dissolution rate to be within a preset range; s3, constructing a gradient pH core shell: firstly, adjusting the pH of the system to an alkaline interval, and carrying out reaction to form a compact inner shell; adjusting the pH value of the system to an acidic interval, and adding a solution containing zinc and fluorine for reaction to form a composite shell; s4, post-treatment: washing and calcining a product obtained in the step S3 to obtain the core-shell silicon dioxide with the antibacterial function. The silicon slag is purified by a one-step method through a four-step integrated process of pretreatment, activation, gradient coating and post-treatment, and the fluorine-containing waste slag is directionally converted into a high-added-value functional material.

The application relates to the technical field of special optical material preparation, in particular to a full-solid-state three-clad zinc fluoride-based glass optical fiber and a preparation method thereof. The optical fiber comprises, from inside to outside, an optical fiber core layer, an optical fiber inner clad layer, an optical fiber middle clad layer and an outer clad layer; the optical fiber core layer, the optical fiber inner clad layer and the optical fiber middle clad layer are all zinc fluoride-based glass and have the same component types; the refractive index of the optical fiber core layer is greater than that of the optical fiber inner clad layer; the materials of the optical fiber core layer, the optical fiber inner clad layer and the optical fiber middle clad layer all comprise the following components: ZnF2, BaF2, GaF3, SrF2, LiF, YF3, LaF3, PbF2, NaF and 0-12 mol% of rare earth fluoride; and the material of the outer clad layer is polytetrafluoroethylene. The prepared optical fiber has the advantages of high transmittance, low phonon energy, small loss, stable structure, high mechanical strength, simple preparation process, good repeatability, suitability for mass production and application in the fields of communication and the like.

The invention discloses a method for removing calcium and magnesium ions in a zinc sulfate solution and prolonging the working time of an evaporator. The method comprises the following steps: mixing and reacting a zinc sulfate solution, zinc fluoride and an alkaline zinc-containing substance, and filtering to obtain the zinc sulfate solution. According to the method provided by the invention, the content of calcium ions and magnesium ions in the zinc sulfate solution can be effectively reduced, other cation impurities are not introduced, the content of fluorine ions in the zinc sulfate solution can be controlled, and corrosion of the fluorine ions to a pipeline is avoided.

The invention discloses a method for rapidly and efficiently removing magnesium from a zinc hydrometallurgy leaching solution. The method comprises the following steps: firstly, adding sodium fluoride and zinc fluoride into pure water, and stirring to obtain precipitant slurry; adding a zinc-magnesium mixed solution into the composite precipitant slurry, and carrying out solid-liquid separation after precipitation to obtain a magnesium precipitate and a zinc-containing filtrate; according to the method, the zinc-magnesium mixed solution is reversely added into the sodium fluoride and zinc fluoride precipitant, so that the filtering speed of solid-liquid separation can be remarkably increased, meanwhile, it can be guaranteed that magnesium ions have a high precipitation rate, efficient magnesium removal of the zinc hydrometallurgy leaching solution is achieved, and the method is suitable for large-scale popularization and application. Therefore, the problems of difficult filtration and insufficient magnesium precipitation rate caused by a single precipitator and a precipitator forward adding method are solved, the whole process is mild in operation condition, the operation can be completed under normal pressure and at the temperature close to the temperature of the zinc hydrometallurgy leaching solution, and the process is suitable for industrial popularization and has better industrial application value.

The application discloses high-purity anhydrous scandium fluoride and a preparation method thereof, and belongs to the field of rare earth fluoride preparation. The preparation method comprises the following steps: mixing scandium oxide and zinc fluoride by a mechanical activation treatment method to obtain mixed raw materials, using mechanical activation to induce crystal lattice defects, significantly improving the kinetic conditions of the solid-solid reaction process of scandium oxide and zinc fluoride, and making fluorination more sufficient; roasting the mixed raw materials under an inert atmosphere to obtain roasted materials; putting the roasted materials into a mixed leaching system containing ammonia and ammonium salt for selective leaching, and then filtering and separating to obtain a solid crude product; using an ammonia-ammonium salt complex system, using the high stability of Zn(NH3)4] 2+ complex ions to realize accurate separation of by-products Zn and main products ScF3; and washing and drying the solid crude product to obtain anhydrous scandium fluoride, with a content of 400 ppm or less and a fluorination rate of 99.99%.

The application belongs to the technical field of batteries, and discloses a local high-concentration ionic liquid electrolyte, a preparation method thereof and an assembled high-voltage zinc-tellurium battery. The electrolyte comprises an ionic liquid, zinc bromide, zinc fluoride and an organic cosolvent; the ionic liquid is one or more of 1-vinyl-3-butyl imidazolium bromide, 1-ethyl-3-methyl imidazolium bromide, 1-propyl-3-methyl imidazolium bromide or 1-butyl-3-methyl imidazolium bromide. The local high-concentration ionic liquid electrolyte contains active species ZnBr4 2‑ , which can activate the positive-valence conversion of tellurium, play the effect of exciting and stabilizing the Te 0 / Te 4+ redox pair. The zinc-tellurium battery assembled thereby can realize the two-step conversion reaction of Te 4+ / Te and Te / Te 2‑ of the tellurium positive electrode, improve the energy output of the battery, increase the high-voltage discharge platform capacity ratio of the zinc-tellurium battery to 80.6%, and improve the rate performance of the zinc-tellurium battery.

Method comprising: forming a dummy gate structure (75) over a semiconductor fin (64); forming a dielectric layer (90) on opposite sides of the dummy gate structure (75); removing the dummy gate structure (75) to form a recess (92) in the dielectric layer (90); successively forming a gate dielectric layer (94) and at least one conductive layer (96, 98) over side walls and a bottom surface of the recess (92);and treating the gate dielectric layer (94) and the at least one conductive layer (96, 98) with a fluoride-containing chemical, wherein the treatment comprises forming a film over the at least one conductive layer (96, 98) using a fluoride-containing precursor, wherein the fluoride-containing precursor is molybdenum hexafluoride, MoF6, iron(II) fluoride, FeF2, iron(III) fluoride, FeF3, nickel(II) fluoride, NiF2, cobalt(II) fluoride, CoF2, chromium(II) fluoride, CrF2, chromium(III) fluoride, CrF3, copper(I) fluoride, CuF, molybdenum(III) fluoride, MoF3, titanium(III) fluoride, TiF3, titanium(IV) fluoride, TiF4, aluminum fluoride, AlF3, tetrafluorosilane, SiF4, manganese(II) fluoride, MnF2, zirconium(IV) fluoride, ZrF4, niobium(V) fluoride, NbF5, hafnium(IV) fluoride, HfF4, tantalum(V) fluoride, TaF5, sodium fluoride, NaF, potassium fluoride, KF, lithium fluoride, LiF, magnesium fluoride, MgF2, calcium fluoride, CaF2, barium fluoride, BaF2, zinc fluoride, ZnF2 or lead(II) fluoride, PbF2.;

The invention discloses a method for preparing fluoroformate, which comprises the following steps: by taking chloroformate as a raw material and hydrogen fluoride as a fluorination reagent, mixing chloroformate steam and hydrogen fluoride gas, and performing gas-phase catalysis on the chloroformate and hydrogen fluoride to generate fluorination reaction through a fixed bed reactor filled with a catalyst to obtain the fluoroformate, the catalyst is characterized in that at least one of active components of lithium fluoride, potassium fluoride, sodium fluoride, rubidium fluoride or cesium fluoride is loaded on at least one of carriers of activated carbon, aluminum fluoride, magnesium fluoride, ferric fluoride, chromium fluoride and zinc fluoride, the mass percentage ratio of the active components to the carriers of the catalyst is 10-50%: 50-90%, the reaction temperature is 200-400 DEG C, and the retention time is 10-60 s. The method has the advantages of greenness, high efficiency, continuous catalysis and the like.

The invention provides a positive pole piece, a secondary battery, a battery pack and an energy storage system, the secondary electrode comprises the positive pole piece, the positive pole piece comprises a positive active material with a core-shell structure, the core of the core-shell structure is a layered transition metal oxide, the shell of the core-shell structure is made of a first fluoride, and the first fluoride is made of a second fluoride. The first fluoride is selected from at least one of zinc fluoride, zirconium fluoride, niobium fluoride, titanium fluoride and cadmium fluoride. According to the present invention, even if the active layer including the positive electrode active material cracks, the layered transition metal oxide does not directly contact the electrolyte, but the layered transition metal oxide is separated from the electrolyte through the shell, such that the transition ions in the layered transition metal oxide are prevented from being dissolved, and the cycle stability of the secondary battery is improved. Zinc, zirconium, niobium, titanium and cadmium belong to transition metals and have relatively good stability, and the shell contains fluorides of the elements, so that the positive active material has long-term stability, and the long cycle stability of the secondary battery is improved.

The application discloses a method for stabilizing a ZnOHF protective layer in zinc sulfate and application of the method to a water-based zinc ion battery, only introduces an external ion, that is, the existence of ZnOHF is stabilized in 2M ZnSO4 through electrolyte regulation, so that the ZnOHF can synergize, a uniform electric field is achieved, and the purpose of uniform zinc deposition is achieved, meanwhile, the protective layer in the solution is continuously repaired, so that the method for stabilizing a zinc negative electrode is realized. The electrolyte solvent is water, and the solute is zinc fluoride (ZnF2) and zinc sulfate (ZnSO4). The protective layer is zinc hydroxide fluoride (ZnOHF). The zinc negative electrode comprises zinc sheets, zinc foils, zinc powders, zinc meshes, porous zinc or zinc alloys. Under the synergistic effect of the electrolyte and the protective layer, the zinc negative electrode exhibits excellent deposition-dissolution reversibility, the dendrite growth is inhibited, the hydrogen evolution reaction is inhibited, and the generation of by-products is slowed down. The method is simple and low in cost, and can significantly improve the cycle stability of the zinc negative electrode in the water-based zinc ion battery.

The invention discloses a synthesis method and a purification process of high-purity phosphorus trifluoride, and relates to the technical field of inorganic fluoride preparation. The synthesis method and the purification process of the high-purity phosphorus trifluoride at least comprise the following steps: reacting zinc fluoride with phosphorus trichloride at 20-80 DEG C to obtain a phosphorus trifluoride crude product; the phosphorus trifluoride crude product is subjected to pre-purification, and pre-purified gas is obtained; freezing and collecting the pre-purified gas to obtain pre-purified phosphorus trifluoride gas; the pre-purified phosphorus trifluoride gas is subjected to deep purification, and high-purity phosphorus trifluoride is obtained. According to the synthesis method and the purification process of the high-purity phosphorus trifluoride, impurities can be effectively removed, a phosphorus trifluoride product with the purity reaching 6N or above can be finally obtained, the purification process is optimized, the product purity is remarkably improved, and the synthesis method and the purification process have the remarkable advantages of being simple in process, low in cost and suitable for large-scale industrial production.

The present application relates to a kind of zinc surface chromium-free passivation solution and its application, the pH value of the zinc surface chromium-free passivation solution is 8±0.5, it at least dissolves the following substances: (i) transition metal acid or transition metal salt, (ii) hydrogen fluoride or fluoridated salt, (iii) hydrogen peroxide or metal peroxide.The transition metal acid or transition metal salt used in the zinc surface chromium-free passivation solution is reduced into dense transition metal oxide on the surface of zinc oxide itself, zinc surface is oxidized due to the double oxidation of transition metal acid radical and peroxide, forms zinc oxide, and part of divalent zinc is combined into zinc fluoride with fluoride ion, finally forms the passivation film of three substances coexisting of transition metal oxide, zinc oxide, zinc fluoride, and the salt spray corrosion resistance of zinc surface after passivation exceeds 168 hours.

The invention provides Er-doped fluorine tellurium boron zinc laser glass based on zinc fluoride regulation and a preparation method thereof, and belongs to the field of laser glass. The Er-doped fluorine tellurium boron zinc laser glass based on zinc fluoride regulation and control provided by the invention is prepared from a matrix raw material and an erbium oxide doped raw material, the matrix raw material is prepared from the following components in percentage by mass: 67.5 to 77.5 percent of tellurium dioxide, 7 to 8 percent of B2O3, 8 to 12 percent of zinc oxide and 5 to 15 percent of zinc fluoride; the doping amount of the erbium oxide doped raw material is 0.7-0.8% of the total amount of substance of the matrix raw material. The Er-doped fluorine tellurium boron zinc laser glass based on zinc fluoride regulation and control provided by the invention has good thermal stability and light transmission, and also has better luminous efficiency.

To provide a denture adhesive remover that can fully remove denture adhesive attached to dentures.SOLUTION: A denture adhesive remover comprises: at least one polar base selected from the group consisting of lower alcohols having 1 to 5 carbon atoms and polyhydric alcohols; and at least one metal compound selected from the group consisting of calcium chloride, calcium lactate, sodium chloride, magnesium chloride, zinc chloride, iron chloride, sodium carbonate, potassium fluoride, zinc fluoride, aluminum phosphate, sodium thiosulfate, anhydrous sodium sulfate, magnesium sulfate, aluminum sulfate, ferrous sulfate, sodium sulfite, calcium nitrate, magnesium nitrate, zinc nitrate, aluminum lactate, potassium acetate, calcium acetate, magnesium acetate, iron hexacyanoate, sodium hydroxide, potassium hydroxide, calcium oxide, aluminum oxide, aluminum ammonium sulfate, ammonium iron sulfate, potassium aluminum sulfate, and hydrates thereof. The concentration of the polar base is 1 to 99 mass% based on the total amount of the denture adhesive remover, and the concentration of the metal compound is 0.01 to 97 mass% based on the total amount of the denture adhesive remover.SELECTED DRAWING: None

The present invention relates to a method for removing fluoride ions from zinc sulfate solution, belonging to the technical field of hydrometallurgical zinc smelting. The present invention comprises the following steps: (1) adding calcium hydroxide powder to the zinc sulfate solution, and simultaneously introducing an inert gas into the zinc sulfate solution, so that calcium ions react with fluoride ions to form calcium fluoride precipitate; (2) filtering the solution after the reaction in step (1) to obtain supernatant and precipitate residue; (3) adding water to the precipitate residue obtained by filtration in step (2), then adding sodium hydroxide to adjust the pH value, and then adding a complexing agent to cause a complexation reaction of the precipitate residue; (4) filtering the liquid after the complexation reaction in step (3) to separate calcium fluoride and zinc fluoride in the precipitate residue; The present invention removes fluoride ions through chemical reactions, improves the removal rate and efficiency, reduces the volatilization amount of hydrogen fluoride, reduces the probability of the occurrence of the situation where the adsorbent has no contact with hydrogen fluoride, separates zinc fluoride for reuse, and reduces the zinc loss rate.

The invention discloses a preparation method of a zinc negative electrode wide temperature type coating material for an Ah-grade zinc-manganese dioxide soft package battery. Zinc fluoride and zinc carbonate additives are introduced into a commercial coating to construct a zinc negative electrode organic-inorganic composite coating. At a low temperature (-30 DEG C), inorganic components in the coating promote migration and uniform deposition of Zn, and an organic layer blocks water corrosion and inhibits a hydrogen evolution reaction; at the high temperature (60 DEG C), the coating effectively reduces the content of free water on the zinc surface and inhibits side reaction and dendritic crystal growth caused by high water activity. The ZnMnO total battery assembled by the coating modified zinc foil can stably circulate for 1000 circles under the current density of 1A g at the temperature of-30 DEG C and 60 DEG C. The assembled zinc-manganese dioxide soft package battery can stably circulate for 20 circles at the temperature of-20 DEG C, and the capacity reaches 1.4 Ah. In conclusion, the coating modified zinc negative electrode obviously enhances the wide temperature range stability of the zinc-manganese dioxide soft package battery. The preparation process is simple, efficient and low in cost, and meets the requirements of environmental and economic benefits.

The application belongs to the technical field of wastewater treatment composite materials, and particularly relates to a super-hydrophobic melamine sponge for dye degradation and emulsion purification and a preparation method thereof. Ag-MOF and hydroxyl zinc fluoride nanoparticles are synthesized through a simple hydrothermal method, and the two kinds of nanoparticles are loaded onto the melamine sponge by using polydimethylsiloxane to obtain super-hydrophobic super-oil-wetting Ag-MOF@hydroxyl zinc fluoride@polydimethylsiloxane@melamine sponge, the hydrophobic angle of which is as high as 155.3°, and the adsorption capacity reaches 54.6-109.7g / g. Meanwhile, the super-hydrophobic super-oil-wetting Ag-MOF@hydroxyl zinc fluoride@polydimethylsiloxane@melamine sponge also shows excellent oil-water separation capacity (99%), dye degradation capacity (99%) and emulsion purification capacity (98%). Therefore, the modified sponge prepared by the application has a wide application prospect in the field of wastewater treatment.

The invention discloses a composite passivation layer, a zinc metal negative electrode and a zinc metal negative electrode modification method and application, the modification method comprises the following steps: dissolving a fluorine source in deionized water, adding a certain amount of a phosphorus source, uniformly stirring to obtain a solution A, soaking a polished zinc sheet in the solution A, taking out, cleaning with deionized water, and drying to obtain the zinc metal negative electrode. The zinc metal negative electrode with the amorphous zinc fluoride and hydrated zinc phosphate composite passivation layer is obtained. The amorphous zinc fluoride and hydrated zinc phosphate composite passivation layer is generated on the surface of the zinc metal through the in-situ reaction, the passivation layer grows on the surface of the zinc metal in situ, the passivation layer and the zinc metal are firmly combined, and the interface stability is good; the passivation layer has extremely high resistivity and zinc ion conductivity, and can effectively inhibit zinc dendrite growth, reduce interface side reaction activity, slow down corrosion of a zinc metal negative electrode and prolong the cycle life of the zinc ion battery on the premise of not hindering zinc ion transmission. The method is simple in process, short in reaction time, low in cost, environmentally friendly and suitable for large-scale industrial production.

The invention relates to the technical field of second-order nonlinear optical materials, in particular to a second-order nonlinear optical material zinc fluoroborate as well as a preparation method and application thereof. The chemical formula of the zinc fluoborate is KZnBO3FH, and the crystallographic characteristics are as follows: the zinc fluoborate belongs to a hexagonal system, the space group is P-6c2, and the crystal unit cell parameters are as follows: alpha is equal to 90 degrees, beta is equal to 90 degrees, and gamma is equal to 120 degrees; z = 2. According to the zinc fluoborate salt, a hydrothermal synthesis process is adopted, boric acid and water are used as solvents, zinc fluoride, potassium carbonate and potassium fluoborate react for 12-48 hours at the temperature of 200-220 DEG C under the condition of a potassium hydroxide strong alkali medium, and finally the potassium zinc fluoborate which has a regular triangular prism shape and is crystallized in a non-centered space group is obtained. The potassium zinc fluoborate shows excellent second-order nonlinear optical characteristics, the powder frequency-doubled effect intensity of the potassium zinc fluoborate can reach 7 times that of a KH2PO4 (KDP) reference material, and meanwhile, the potassium zinc fluoborate has a 379nm short-wave ultraviolet absorption cutoff edge and shows excellent wide-spectrum light transmission performance.