65 results about "Alkali metal halide" patented technology

The invention relates to the technical field of sodium-ion batteries, in particular to a preparation method of a sodium-ion battery hard carbon negative electrode material. The preparation method disclosed by the invention comprises the following steps: sequentially carrying out bacterium-enzyme synergistic fermentation, acid pickling, treatment of a mixed solution of alkali metal halide and ammonia water, treatment of a mixed solution of tin salt and a sulfur-containing compound, low-temperature carbonization, coating with a coating agent and high-temperature carbonization on biomass powder to finally obtain the sodium-ion battery hard carbon negative electrode material loaded with SnSx, a space is provided for volume expansion of SnSx by an ordered, loose and porous structure inside the SnSx.

The present invention relates to a resource recovery method for sulfide all-solid-state batteries, which belongs to the field of solid-state battery technology. The main process is: retired sulfide all-solid-state battery cells undergo sulfur-heat reaction to obtain pyrolysis slag and current collectors, the pyrolysis slag undergoes water immersion treatment, and is separated to obtain water leaching liquid and water leaching slag, the water leaching liquid is concentrated and lithium precipitation is treated to separate lithium carbonate and alkali metal hydroxide solution, the water leaching slag undergoes acid leaching treatment to separate acid leaching slag and acid leaching liquid, the acid leaching liquid undergoes phosphorus precipitation treatment to separate hydroxyphosphate and phosphorus removal liquid, the phosphorus removal liquid undergoes nickel-cobalt-manganese precipitation treatment to separate nickel-cobalt-manganese coprecipitate and neutral alkali metal halide solution, the acid leaching slag undergoes dissolution treatment to separate graphite and sulfur, and the non-polar organic solvent is recycled. This method can effectively achieve high-value-added recovery of energy metals in retired sulfide all-solid-state batteries, synergistically achieve the recovery of graphite and sulfur, with low energy consumption and emissions and high raw material utilization.

The invention discloses a water-soluble stable anion free radical compound and a preparation method and application thereof, the anion free radical compound comprises an electron donor and an electron acceptor, the electron donor is an alkali metal compound, and anions of the alkali metal compound are halide ions; moreover, electrons of halide ions are delocalized from an electron donor to an electron acceptor to form an anion free radical compound. An electron donor and an electron acceptor form a charge transfer compound, and the charge transfer compound is self-assembled to form a stable anion free radical compound. The free radical compound takes alkali metal halide salt as an electron donor, on one hand, integer charge transfer between halogen anions and an electron acceptor can be met, and F4TCNQ.-anion free radicals are rapidly generated; on the other hand, coordination bonds with moderate strength are formed between alkali metal cations and F4TCNQ.-. Therefore, the composition has excellent water solubility and stability.

The invention discloses an inorganic halide luminescent material as well as a preparation method and application thereof. The chemical general formula of the material is CsI: xMn < 2 + >, yPb < 2 + >, 0 lt; x is less than or equal to 0.3, 0lt; and y < = 0.02. The material takes alkali metal halide CsI as a matrix, a [Mn2I10] 6-dimer luminescence center with a zero-dimensional electronic structure is formed by doping Mn < 2 + > at a high concentration, and Pb < 2 + > with an ns2 electronic structure is introduced to induce a Jahn-Teller effect, so that the formation of self-confinement excitons (STE) is enhanced; the material can be effectively excited by the band from ultraviolet to blue light, and emits broadband near-infrared light with the peak value larger than 1000 nm and the half-peak width larger than 150 nm. The preparation method adopts a solvothermal method, and a high-quality microcrystal or single crystal material is obtained by regulating and controlling parameters such as precursor ratio, doping concentration and reaction temperature. The material breaks through the limitation of traditional near-infrared first-area luminescence, has the characteristics of environmental friendliness and good biocompatibility, can be widely applied to the fields of night vision imaging, biomedical nondestructive testing, optical communication, near-infrared LEDs and the like, and has important scientific value and wide application prospect.

The present application relates to a preparation method of an alkali metal salt of bis(fluorosulfonyl)imide, comprising the following steps: carrying out a metallization reaction on bis(fluorosulfonyl)imide, an alkali metal halide salt and an acid-binding agent at ≥65 °C without adding an additional solvent to prepare the alkali metal salt of bis(fluorosulfonyl)imide. The acidic gas generated by this method can directly react with the acid-binding agent to form a hydrogen halide organic salt. Through the synergistic effects in multiple aspects, the yield and purity of the alkali metal salt of bis(fluorosulfonyl)imide can be effectively improved; moreover, the raw materials are easily available, the operation is simple, no solvent is required, the reaction conditions are relatively mild, the requirements for equipment in the reaction process and the product are relatively low, and industrial production can be carried out.

The invention relates to a rust accelerator that is present as a one-component rust accelerator or as a two-component rust accelerator, comprising as component (a) one or more aliphatic carboxylic acids or carboxylic acid esters in a total amount of 0.5 to 6 parts by weight, as component (b) one or more alkali halides or ammonium chloride in a total amount of 0.002 to 0.5 parts by weight, and as component (c) at least one hydrogen peroxide compound in an amount of 2.0 to 150 parts by weight. The invention also relates to a process for the oxidation of iron-containing metals using the rust accelerator according to the invention.

The invention relates to a carbon dioxide photo-thermal catalytic conversion catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a titanium source, an alkali metal halide, a copper source and a manganese source, and calcining in an inert atmosphere to obtain the carbon dioxide photo-thermal catalytic conversion catalyst. The copper source and the manganese source are jointly loaded on the titanium-based carrier, the synergistic effect of the copper source and the manganese source is achieved, and the photo-thermal catalytic conversion effect of carbon dioxide is improved. According to the invention, the titanium source, the copper source and the manganese source can be uniformly mixed in a calcining state by exerting the solvent medium effect of the alkali metal halide without assistance of a solvent for assisting dissolution. The preparation method is simple in process, raw materials are easy to obtain, and the prepared catalyst is simple in composition, high in methane selectivity, good in economic benefit and easy to popularize and use on a large scale when being used for the photo-thermal catalytic conversion process of carbon dioxide.

The invention discloses a method for preparing a supported metal catalyst-assisted few-walled carbon nanotube. The supported metal catalyst-assisted few-walled carbon nanotube comprises a catalytic active metal, an alkali metal halide eutectic salt and a porous metal oxide carrier. The method comprises the following steps: loading the ternary composite catalyst on a conductive substrate to prepare a working electrode; and at the reaction temperature, introducing gas containing a carbon source into the reactor, and simultaneously applying direct-current voltage or current to the working electrode to carry out chemical vapor deposition reaction. According to the invention, a molten liquid phase formed by eutectic salt at a high temperature is used as an ionic conductor, a high-temperature solid-liquid-gas three-phase electrochemical reaction interface is constructed, and in-situ electrochemical regulation of active sites of the catalyst is realized. According to the method, the intrinsic activity and the thermal stability of the catalyst are improved through the electrochemical polarization effect, meanwhile, the structural selectivity of the product carbon nano tube can be effectively regulated and controlled, and a new way is provided for oriented synthesis of the high-quality few-walled carbon nano tube.

The invention discloses an oligonucleotide purification method which comprises the following steps: loading an oligonucleotide crude product onto an anion exchange column, balancing by using a buffer solution, and then carrying out gradient elution on target oligonucleotide with a hydroxyl protecting group by using a mixture of the buffer solution and a buffer solution containing alkali metal halide, collecting elution fractions containing target oligonucleotides, carrying out ultrafiltration desalination, loading the elution fractions onto the anion exchange column again, balancing the elution fractions with a buffer solution, washing the anion exchange column with an acidic aqueous solution to remove hydroxyl protecting groups of the oligonucleotides, balancing the elution fractions with the buffer solution, and collecting the target oligonucleotides. And carrying out gradient elution on the target oligonucleotide with the hydroxyl protecting group removed by using a buffer solution and a buffer solution containing alkali metal halide. The oligonucleotide obtained by the purification method is high in purity, low in cost and suitable for large-scale production.

The application provides a two-dimensional Cr2C and a preparation method thereof, wherein the preparation method comprises the following steps: step S1, providing a Cr2(AlLi)C solid solution; and step S2, de-alloying AlLi in the Cr2(AlLi)C solid solution to generate the two-dimensional Cr2C. According to the preparation method of the application, the reaction reagents can be selected from water, an aqueous alkali metal halide solution, methanol or a methanol aqueous solution and the like, which are clean and environmentally friendly, and the preparation method has the characteristics of environmental protection, economy and high efficiency, and is different from the acid etching method which is seriously polluted and high in cost. In addition, by using different etching solutions, the types of functional groups of the two-dimensional Cr2C can be selected. In addition, the two-dimensional Cr2C prepared by the preparation method of the embodiment of the application has a smaller thickness, oligolayer Cr2C enes can be obtained, and two-dimensional Cr2C with an accordion shape can also be obtained.

This disclosure proposes a method and application for constructing hierarchical porous carbon materials using low-melting-point eutectic salts in conjunction with bio-templates. The method includes selecting lignocellulosic biomass raw materials with vascular or pore structures, crushing, washing, and drying to obtain biomass powder; mixing at least two alkali metal halides in a eutectic ratio and grinding to obtain a low-melting-point eutectic salt mixture; physically mixing or liquid-phase impregnation mixing the biomass powder and the eutectic salt mixture, followed by drying to obtain a composite precursor; pyrolyzing the composite precursor in a high-temperature reactor under an inert atmosphere to obtain a reaction product; after cooling the reaction product to room temperature, washing it in deionized water to dissolve and separate the inorganic salts; evaporating and crystallizing the washing liquid to obtain a solid product; soaking the washed solid product in dilute acid, washing it with water until neutral, drying, and sieving to obtain the hierarchical porous carbon material.

The invention discloses a composite material and a preparation method thereof, a thin film, a photoelectric device and a display device, the composite material comprises metal oxide nanoparticles and a shell layer coating the surfaces of the metal oxide nanoparticles, and the material of the shell layer comprises alkali metal halide. According to the composite material provided by the technical scheme of the invention, the surfaces of the metal oxide nanoparticles are coated with the alkali metal halide, so that the stability of the metal oxide nanoparticles in the electrifying process is improved, and the electrochemical change is reduced.

The application provides a mass production method for an intermediate valence state vanadium oxide electronic phase change powder and single crystal, belongs to the field of heat-sensitive electronic phase change materials, and particularly relates to a method for realizing mass production of high-purity and high-uniformity polycrystalline or single crystal materials in a precisely controlled atmosphere by using an additive with the dual effects of fluxing agent and heterogeneous seed crystal, fully dissolving a precursor required for synthesizing the system material by means of a molten alkali halide fluxing agent, and fully reacting the precursor in the process, so as to greatly reduce the reaction temperature and reaction time required for material synthesis, realize mass production of the materials in the precisely controlled atmosphere, and continuously regulate the metal insulator transition temperature of the materials in a wide range by further regulating the valence of vanadium in the intermediate valence state vanadium oxide, the type of doped elements and the doping ratio, so that the method has certain application prospects in the fields of strong light protection, infrared camouflage, thermochromism and sudden change type thermistor devices.

The present invention provides a solid electrolyte, a method for preparing the same, its use, and an electrochemical device. The preparation method includes performing ion exchange of molecular sieve-Na in an acidic solution so that the cations in the pores of molecular sieve-Na are exchanged with protons, forming molecular sieve-H by evaporating water molecules after washing and drying, forming OH by bonding oxygen and protons in the aluminum-oxygen tetrahedron of molecular sieve-H, obtaining molecular sieve-X1 by exchanging OH in molecular sieve-H with halogen X1 (X1 = F, Cl, Br, I) through a halogenation reaction, and firing molecular sieve-X1 and molten AX2 to obtain a solid electrolyte. The pH of the acidic solution is 1.2 < pH < 2.1. AX2 includes an alkali metal halide and / or an alkali metal chalcogenide. The firing temperature is 300 to 500 °C. The solid electrolyte has high ionic conductivity and can be used alone as a solid electrolyte.

The present invention discloses a copper-based scintillator nanocrystal and its preparation method and application. The preparation method of the copper-based scintillator nanocrystal includes: preparing a copper-based scintillator precursor solution; atomizing and quenching the copper-based scintillator precursor solution to prepare copper-based scintillator nanocrystals. The present invention utilizes alkali metal halide and cuprous halide as reactants, dissolving them in an aqueous solution of hydrohalic acid, adding a reducing protective agent, and heating to obtain a copper-based scintillator precursor solution; then, utilizing atomization and quenching technology, atomizing the precursor solution and passing it into the pores of solid carbon dioxide, rapidly cooling to precipitate scintillator nanocrystals. The copper-based scintillator prepared by the method of the present invention has high physical purity, good crystallinity, and excellent optical properties, and can realize the particle size control of the scintillator nanocrystals. In addition, the atomization and quenching method is simple in process and low in production cost.

To provide a method for producing an aromatic polyether that enables simple and efficient removal of a solvent and an alkali metal halide from the reaction mixture of the aromatic polyether, and reduces a residual solvent and an inorganic salt contained in the aromatic polyether to or below a specified level.SOLUTION: A method for producing an aromatic polyether, comprising: a reaction step of obtaining the aromatic polyether by reacting a raw material mixture in the presence of a reaction solvent; and a washing step of washing the aromatic polyether obtained in the reaction step using a washing solvent that dissolves both the reaction solvent and an alkali metal halide generated in the reaction step.SELECTED DRAWING: None

The invention provides an alkali metal halide gradient doped perovskite light absorption layer and a full-vacuum preparation method and application thereof, and belongs to the technical field of perovskite materials. The technical concept of gradient doping-step deposition-synergistic passivation is provided, a vacuum evaporation mode is adopted, and the multi-dimensional contradiction between materials and the technology is overcome by combining alkali metal gradient doping and halogen / pseudo-halogen synergistic passivation; an inorganic framework deposition-organic phase vapor infiltration two-step method is adopted in the process level, temperature conflicts are avoided, and the density of the thin film is improved; rb < + > gradient doping is introduced in material design to form a built-in electric field to inhibit Br <-> migration, and meanwhile, a [K-F] < + + > coordination network and Lewis acid-base passivation sites are constructed through K < + > / F- / SCN <-> co-doping, so that the defect density is reduced.

The invention relates to the technical field of cocatalyst preparation, and particularly provides alkylaluminoxane and a preparation method thereof. The preparation method of the alkylaluminoxane comprises the following steps: mixing metal salt containing crystal water with anhydrous alkali metal halide, grinding to form mixed crystals, and under the protection of inert atmosphere and inert solution, enabling the mixed crystals to be in contact and react with alkylaluminoxane to obtain the alkylaluminoxane. The alkylaluminoxane and the preparation method provided by the invention are used for realizing synthesis of alkylaluminoxane with high yield, high safety and high storage stability.

The application relates to a flux synthesis method of doped niobium dioxide sensitive resistance material, belonging to the field of thermosensitive electronic phase change. Specifically, the application relates to a method for reducing reaction temperature by using a flux, and the doped niobium dioxide electronic phase change material is batch-synthesized through high and low valence state niobium precursor batching and flux reaction in an inert or vacuum atmosphere to prepare powder, ceramic or thin film material. The application provides a non-uniform nucleation condition for new phase growth by introducing an alkali metal halide flux with similar lattice parameters of the synthesized material, reduces the free energy of the nucleation and growth of the new phase, greatly reduces the required reaction temperature and reaction time of the material synthesis, and can realize the batch preparation of high-purity and high-uniformity material in a controllable atmosphere. The reaction speed is fast, energy consumption is reduced, and the prepared doped niobium dioxide electronic phase change material has a chemical formula of Nb 1‑x M x O2: M is a rare earth element or a transition group metal element, and has considerable application value in the fields of high-temperature thermosensitive resistance, critical temperature coefficient thermosensitive resistance, nonvolatile storage, sensors and the like.

The application discloses a purification method of oligonucleotide, which comprises the following steps: loading the crude oligonucleotide into an anion exchange column which is equilibrated with a phosphate buffer solution, washing the anion exchange column with the mixture of the phosphate buffer solution and the phosphate buffer solution containing alkali metal halide after equilibrating the anion exchange column with the phosphate buffer solution, equilibrating the anion exchange column with the phosphate buffer solution again, then washing the anion exchange column with an acidic aqueous solution to remove the hydroxyl protecting group of the terminal nucleoside of the oligonucleotide, and equilibrating the anion exchange column with the phosphate buffer solution, finally eluting the target oligonucleotide with the phosphate buffer solution containing alkali metal halide, and collecting the eluent containing the target oligonucleotide. The purification method of the application can efficiently and stably obtain high-purity oligonucleotide without using organic solvents, and is suitable for the purification of oligonucleotide in large-scale commercial process.

The invention discloses a sulfide solid electrolyte, a preparation method and an all-solid-state lithium ion battery, and belongs to the field of lithium ion batteries. The general chemical formula of the sulfide solid electrolyte is xAB-RySz, AB is alkali metal halide, A is one of Li, Na and K, B is one of F, Cl, Br and I, RySz is metal sulfide, R is one or more of Ca, Sr, Ba, Mn, Fe, Pb, Ge, Cr, As, Sb, V, Ga, Sn, Bi, In, Gd, Cu, Zn and Cu, and x is more than or equal to 0.3 and less than or equal to 0.7; according to the invention, RySz is ZnIn2S4. The sulfide solid electrolyte disclosed by the invention has high room-temperature ionic conductivity and good air stability, can realize assembly of a solid-state battery in air, and meanwhile, the working pressure required by the battery is relatively small, so that preparation of a low-pressure even pressure-free all-solid-state battery is expected to be realized.

The invention discloses a composite catalyst, N, N, N-trimethyl-1-adamantyl ammonium hydroxide as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis. The composite catalyst comprises the following components in percentage by mole: 50%-75% of an active component and 25%-50% of an auxiliary agent, the active component is alkali metal halide or alkaline earth metal halide; the auxiliary agent is metal sulfate. The invention also provides application of the composite catalyst in synthesis of N, N, N-trimethyl-1-adamantyl quaternary ammonium salt by taking 1-amantadine and dimethyl carbonate as raw materials. A novel composite catalytic system is adopted, 1-amantadine, dimethyl carbonate and calcium oxide serve as raw materials to prepare N, N, N-trimethyl-1-adamantyl ammonium hydroxide, and the N, N, N-trimethyl-1-adamantyl ammonium hydroxide is used for solving the problems that an existing production technology of N, N, N-trimethyl-1-adamantyl ammonium hydroxide needs two-step methylation, the technological process is complex, an ion exchange or electrolysis technology needs to be used for separation and purification, and the production cost is low. The treatment cost is high.

A process for the cracking of a carbon-containing feedstock to produce olefins, aromatics and / or aliphatic includes contacting, in a reactor system, the carbon-containing feedstock with oxygen gas in the presence of a molten salt matrix consisting of a eutectic mixture of alkali metal carbonates, alkali metal hydroxides, alkali metal nitrates, alkali metal halides, alkaline earth metal carbonates, alkaline earth metal hydroxides, alkali earth nitrates, alkaline earth metal halides, rare earth metal carbonates, transition metal carbonates, transition metal hydroxides, transition metal nitrates, transition metal halides, or a mixture of any two or more thereof, to generate an olefin-containing product stream; and collecting an olefin from the olefin-containing product stream; wherein the oxygen is fed with the carbon-containing feedstock in a gas stream comprising from greater than 0 wt % to about 21 wt % oxygen in an inert gas; and the process is conducted in the absence of a catalyst

The object of the present invention is to provide an antistatic agent that imparts excellent antistatic properties to thermoplastic resins. [Solution] An antistatic agent (Z) comprising a block polymer (A) having blocks of hydrophobic polymer (a) and blocks of hydrophilic polymer (b) as constituent units, an alkyl (alkyl with 6 to 18 carbon atoms) benzenesulfonate (S1), and at least one salt (S2) selected from the group consisting of alkali metal halides and alkali metal halides.

The invention provides a novel oxysulfide and a light absorption property regulation and control method thereof, the chemical formula of the novel oxysulfide is SrGaSbO3S, the novel oxysulfide belongs to an orthorhombic system Pnma, has a two-dimensional layered structure, and is formed by alternately stacking [GaSbO3S] < 2-> and interlayer Sr < 2 + > ions. The material is placed in molten alkali metal halide for annealing treatment, and an amorphous layer is formed on the surface due to ion topology corrosion, so that the optical band gap of the material is obviously narrowed and is reduced to 1.69 eV from 2.11 eV, and the color is changed into orange from light yellow. The oxysulfide and the band gap regulation and control method thereof have important significance in application in the fields of photocatalysis, photoelectric conversion and the like.

The application discloses alkali metal doped perovskite single crystal material and a preparation method and application thereof. A high-concentration alkali metal halide is introduced into a perovskite aqueous phase precursor, and an alkali metal doped perovskite single crystal is precipitated through a cooling method. The traditional cesium lead bromide perovskite light emitting wavelength band is near 520 nm, and wide spectrum emission cannot be realized. The scheme can prepare a centimeter level perovskite CsPb2Br5 single crystal with wide spectrum emission. Test results show that the alkali metal doped perovskite CsPb2Br5 single crystal fluorescence spectrum covers a visible light and near infrared light wavelength band (500-1000 nm).

The invention relates to the technical field of organic synthesis, in particular to a preparation method of p-phenylenediamine, which comprises the following steps: S1, adding a solvent and organic alkali into a reactor, controlling the temperature in a system, adding alkali metal halide, uniformly dispersing, dropwise adding benzoyl chloride into the system, and controlling the temperature of the system for reaction; and S2, adding terephthalamide into the reaction system in the step S1, controlling the temperature of the system for reaction, and after the reaction is finished, performing post-treatment and purification to obtain the p-phenylenediamine. According to the preparation method of p-phenylenediamine, N-halogenated benzamide is generated in situ in a reaction system by adding acyl chloride and alkali metal halide, and acyl chloride by-products can be recycled after the reaction is finished. The high-activity halogen source is generated in situ in a reaction system, the reaction activity of the halogen source can be accurately controlled, and the side reaction of product oxidation caused by excessive halogen sources is avoided. Therefore, the target product p-phenylenediamine with high yield and high purity is obtained.

The present invention provides a radiographic imaging panel, device, system, and scintillator sheet. The radiographic imaging panel includes a substrate on which a plurality of pixels, each including a photoelectric conversion element, are arranged, a scintillator arranged on the substrate, and a protective layer arranged to cover the scintillator. The scintillator includes a plurality of columnar crystals containing an alkali metal halide. The protective layer includes a resin layer containing a resin to which metal oxide particles are added. The thickness of the resin layer from the apex of each of the plurality of columnar crystals to the upper surface of the resin layer is greater than or equal to 10 μm and less than 30 μm, and the particle concentration in the resin layer is greater than or equal to 0.15 vol% and less than 7.5 vol%.

The invention provides a packaging adhesive film for a perovskite assembly and a photovoltaic assembly and application thereof. The adhesive film comprises a packaging adhesive film base material and inorganic salt, wherein the inorganic salt is selected from one or more of alkali metal halide AX, alkaline earth metal halide BX2, lead compound PbX or PbX2; wherein A is an alkali metal element; b is an alkaline earth metal element; x is one or more of Cl ions, Br ions, I ions, S ions and sulfate ions. According to the invention, the inorganic salt is used as the passivation material and is combined with the adhesive film matrix material to prepare the packaging adhesive film, so that the process step of post passivation of the perovskite assembly and corresponding expensive vacuum equipment can be omitted, and the packaging cost is greatly reduced while the service life of the perovskite assembly is prolonged.

The invention relates to the technical field of preparation and stripping of MXene, in particular to end-group-adjustable few-layer MXene as well as preparation and application thereof. The preparation method comprises the following steps: firstly, uniformly mixing MAX, conductive carbon black, PVDF (Polyvinylidene Fluoride) and NMP (N-Methyl Pyrrolidone), coating an interlayer wrapped by carbon cloth, and compacting to obtain an etched anode; a spectrum pure graphite rod is used as a counter electrode; then uniformly mixing the alkali metal halide fused salt and halogenated aluminum salt, placing the mixture in an electrolytic bath, and carrying out heating treatment to obtain a melt electrolyte containing polyanion clusters; inserting an etching anode and a counter electrode into the melt electrolyte, applying a constant voltage between the two electrodes to carry out etching treatment, and collecting a product from the etching anode; taking out the product, washing, and performing ultrasonic stripping to obtain a black suspension; and finally, carrying out vacuum filtration and ultrasonic treatment on the obtained black suspension, centrifuging, and collecting supernate to obtain the end-group-adjustable few-layer MXene. According to the invention, an expandable non-destructive way is established for controlling surface chemical and interlayer stripping of MXene.